Java2实用教程（第二版）程序代码——第二十章 输入输出流
1
//例子1
2import java.io.*;
3class Example20_1
4
{ public static void main(String args[])
5
{ File f1=new File("F:\\8000","Example20_1.java");
6
File f2=new File("F:\\8000");
7 System.out.println("文件Example20_1是可读的吗:"+f1.canRead());
8 System.out.println("文件Example20_1的长度:"+f1.length());
9 System.out.println("文件Example20_1的绝对路径:"+f1.getAbsolutePath());
10 System.out.println("F:\\8000:是目录吗？"+f2.isDirectory());
11
}
12
}
13
14//例子2
15import java.io.*;
16class FileAccept implements FilenameFilter
17{ String str=null;
18 FileAccept(String s)
19 { str="."+s;
20 }
21 public boolean accept(File dir,String name)
22 { return name.endsWith(str);
23 }
24}
25public class Example20_2
26{ public static void main(String args[])
27 { File dir=new File("F:/8000");
28 FileAccept acceptCondition=new FileAccept("java");
29 String fileName[]=dir.list(acceptCondition);
30 for(int i=0;i<5;i++)
31 { System.out.println(fileName[i]);
32 }
33 }
34}
35
36//例子3
37import java.io.*;import java.awt.*;import java.awt.event.*;
38class Example20_3
39{ public static void main(String args[])
40 { int b;
41 TextArea text;
42 Frame window=new Frame();
43 byte tom[]=new byte[25];
44 window.setSize(100,100);text=new TextArea(10,16);
45 window.setVisible(true);window.add(text,BorderLayout.CENTER);
46 window.pack();
47 window.addWindowListener(new WindowAdapter()
48 { public void windowClosing(WindowEvent e)
49 { System.exit(0);
50 }
51 });
52
53 try{ File f=new File("F:\\8000","Example20_1.java");
54 FileInputStream readfile=new FileInputStream(f);
55 while((b=readfile.read(tom,0,25))!=-1)
56 {
57 String s=new String (tom,0,b);
58 System.out.println(s);
59 text.append(s);
60 }
61 readfile.close();
62 }
63 catch(IOException e)
64 { System.out.println("File read Error");
65 }
66 }
67}
68
69//例子4
70import java.io.*;
71class Example20_4
72{ public static void main(String args[])
73 { int b;
74 byte buffer[]=new byte[100];
75 try{ System.out.println("输入一行文本，并存入磁盘：");
76 b=System.in.read(buffer); //把从键盘敲入的字符存入buffer。
77 FileOutputStream writefile=new FileOutputStream("line.txt");
78 writefile.write(buffer,0,b); // 通过流把 buffer写入到文件line.txt。
79 }
80 catch(IOException e)
81 { System.out.println("Error ");
82 }
83 }
84}
85
86//例子5
87import java.io.*;import java.awt.*;import java.awt.event.*;
88class Example20_5
89{ public static void main(String args[])
90 { char a[]="今晚10点发起总攻".toCharArray();
91 int n=0,m=0;
92 try{ File f=new File("F:\\8000","secret.txt");
93 for(int i=0;i<a.length;i++)
94 { a[i]=(char)(a[i]^'R');
95 }
96 FileWriter out=new FileWriter(f);
97 out.write(a,0,a.length);
98 out.close();
99 FileReader in=new FileReader(f);
100 int length=(int)f.length();
101 char tom[]=new char[length];
102 while((n=in.read(tom,0,length))!=-1)
103 { String s=new String (tom,0,n);
104 m=n;
105 System.out.println("密文:"+s);
106 }
107 in.close();
108 for(int i=0;i<m;i++)
109 { tom[i]=(char)(tom[i]^'R');
110 }
111 String 明文=new String(tom,0,m);
112 System.out.println("明文:"+明文);
113 }
114 catch(IOException e)
115 { System.out.println("File read Error");
116 }
117 }
118}
119
120//例子6
121import java.io.*;
122import java.awt.*;
123import java.awt.event.*;
124class EWindow extends Frame implements ActionListener
125{ TextArea text;
126 Button buttonRead,buttonWrite;
127 BufferedReader bufferIn;
128 FileReader in;
129 BufferedWriter bufferOut;
130 FileWriter out;
131 EWindow()
132 { super("流的读取");
133 text=new TextArea(10,10);text.setBackground(Color.cyan);
134 buttonRead =new Button("读取");
135 buttonRead.addActionListener(this);
136 buttonWrite =new Button("写出");
137 buttonWrite.addActionListener(this);
138 setLayout(new BorderLayout());
139 setSize(340,340);
140 setVisible(true);
141 add(text,BorderLayout.CENTER);
142 Panel pNorth=new Panel();
143 pNorth.add(buttonRead);pNorth.add(buttonWrite);
144 pNorth.validate();
145 add(BorderLayout.NORTH,pNorth);
146 addWindowListener(new WindowAdapter()
147 { public void windowClosing(WindowEvent e)
148 { System.exit(0);
149 }
150 });
151 }
152 public void actionPerformed(ActionEvent e)
153 { String s;
154 if(e.getSource()==buttonRead)
155 { try{ text.setText(null);
156 File f=new File("F:\\8000\\","E.java");
157 in=new FileReader(f);
158 bufferIn=new BufferedReader(in);
159 while((s=bufferIn.readLine())!=null)
160 { text.append(s+'\n');
161 }
162 bufferIn.close();
163 in.close();
164 }
165 catch(IOException exp){System.out.println(exp);}
166 }
167 if(e.getSource()==buttonWrite)
168 { try { File f=new File("F:\\8000\\","E.java");
169 FileWriter out=new FileWriter(f);
170 BufferedWriter bufferOut=new BufferedWriter(out);
171 bufferOut.write(text.getText(),0,(text.getText()).length());
172 bufferOut.flush();
173 bufferOut.close();
174 out.close();
175 }
176 catch(IOException exp){ System.out.println(exp);}
177 }
178 }
179}
180public class Example20_6
181{ public static void main(String args[])
182 { EWindow w=new EWindow();
183 w.validate();
184 }
185}
186
187//例子7
188import java.util.*;import java.io.*;
189import java.awt.*;import java.awt.event.*;
190class EWindow extends Frame implements ActionListener,ItemListener
191{ String str[]=new String[7];String s;
192 FileReader file;
193 BufferedReader in;
194 Button start,next;
195 Checkbox box[];
196 TextField 题目,分数;
197 int score=0;
198 CheckboxGroup age=new CheckboxGroup();
199 EWindow()
200 { super("英语单词学习");
201 分数=new TextField(10);题目=new TextField(70);
202 start=new Button("重新练习");start.addActionListener(this);
203 next=new Button("下一题目");next.addActionListener(this);
204 box=new Checkbox[4];
205 for(int i=0;i<=3;i++)
206 { box[i]=new Checkbox("",false,age);
207 box[i].addItemListener(this);
208 }
209 try { file=new FileReader("English.txt");
210 in=new BufferedReader(file);
211 }
212 catch(IOException e){}
213 setBounds(100,100,400,320); setVisible(true);
214 setLayout(new GridLayout(4,1));
215 setBackground(Color.pink);
216 Panel p1=new Panel(),p2=new Panel(),
217 p3=new Panel() ,p4=new Panel(),p5=new Panel();
218 p1.add(new Label("题目:"));p1.add(题目);
219 p2.add(new Label("选择答案："));
220 for(int i=0;i<=3;i++)
221 { p2.add(box[i]);
222 }
223 p3.add(new Label("您的得分:"));p3.add(分数);
224 p4.add(start); p4.add(next);
225 add(p1); add(p2);add(p3); add(p4);
226 addWindowListener(new WindowAdapter()
227 {public void windowClosing(WindowEvent e)
228 { System.exit(0);
229 }
230 });
231 reading();
232 }
233 public void reading()
234 { int i=0;
235 try { s=in.readLine();
236 if(!(s.startsWith("endend")))
237 { StringTokenizer tokenizer=new StringTokenizer(s,"#");
238 while(tokenizer.hasMoreTokens())
239 { str[i]=tokenizer.nextToken();
240 i++;
241 }
242 题目.setText(str[0]);
243 for(int j=1;j<=4;j++)
244 { box[j-1].setLabel(str[j]);
245 }
246 }
247 else if(s.startsWith("endend"))
248 { 题目.setText("学习完毕");
249 for(int j=0;j<4;j++)
250 { box[j].setLabel("end");
251 in.close();file.close();
252 }
253 }
254 }
255 catch(Exception exp){ 题目.setText("无试题文件") ; }
256 }
257 public void actionPerformed(ActionEvent event)
258 { if(event.getSource()==start)
259 { score=0;
260 分数.setText("得分： "+score);
261 try { file=new FileReader("English.txt");
262 in=new BufferedReader(file);
263 }
264 catch(IOException e){}
265 reading();
266 }
267 if(event.getSource()==next)
268 { reading();
269 for(int j=0;j<4;j++)
270 {
271 box[j].setEnabled(true);
272 }
273 }
274 }
275 public void itemStateChanged(ItemEvent e)
276 { for(int j=0;j<4;j++)
277 { if(box[j].getLabel().equals(str[5])&&box[j].getState())
278 { score++;
279 分数.setText("得分： "+score);
280 }
281 box[j].setEnabled(false);
282 }
283 }
284}
285public class Example20_7
286{ public static void main(String args[])
287 { EWindow w=new EWindow();
288 w.pack();
289 }
290}
291
292//例子8
293import java.awt.*;import java.io.*;
294import java.awt.event.*;
295public class Example20_8
296{ public static void main(String args[])
297 { FileWindows win=new FileWindows();
298 }
299}
300class FileWindows extends Frame implements ActionListener
301{ FileDialog filedialog_save,filedialog_load;//声明2个文件对话筐
302 MenuBar menubar;
303 Menu menu;
304 MenuItem itemOpen,itemSave;
305 TextArea text;
306 BufferedReader in;
307 FileReader file_reader;
308 BufferedWriter out;
309 FileWriter tofile;
310 FileWindows()
311 { super("带文件对话框的窗口");
312 setSize(260,270);
313 setVisible(true);
314 menubar=new MenuBar();
315 menu=new Menu("文件");
316 itemOpen=new MenuItem("打开文件");
317 itemSave=new MenuItem("保存文件");
318 itemOpen.addActionListener(this);
319 itemSave.addActionListener(this);
320 menu.add(itemOpen);
321 menu.add(itemSave);
322 menubar.add(menu);
323 setMenuBar(menubar);
324 filedialog_save=new FileDialog(this,"保存文件话框",FileDialog.SAVE);
325 filedialog_load=new FileDialog(this,"打开文件话框",FileDialog.LOAD);
326 filedialog_save.addWindowListener(new WindowAdapter()
327 {public void windowClosing(WindowEvent e)
328 { filedialog_save.setVisible(false);
329 }
330 });
331 filedialog_load.addWindowListener(new WindowAdapter()//对话框增加适配器
332 {public void windowClosing(WindowEvent e)
333 { filedialog_load.setVisible(false);
334 }
335 });
336 addWindowListener(new WindowAdapter()
337 {public void windowClosing(WindowEvent e)
338 { System.exit(0);}
339 });
340 text=new TextArea(10,10);
341 add(text,BorderLayout.CENTER);
342 }
343 public void actionPerformed(ActionEvent e)
344 { if(e.getSource()==itemOpen)
345 { filedialog_load.setVisible(true);
346 text.setText(null);
347 String s;
348 if(filedialog_load.getFile()!=null)
349 {
350 try{ File file= new
351 File(filedialog_load.getDirectory(),filedialog_load.getFile());
352 file_reader=new FileReader(file);
353 in=new BufferedReader(file_reader);
354 while((s=in.readLine())!=null)
355 text.append(s+'\n');
356 in.close();
357 file_reader.close();
358 }
359 catch(IOException e2){}
360 }
361 }
362 else if(e.getSource()==itemSave)
363 { filedialog_save.setVisible(true);
364 if(filedialog_save.getFile()!=null)
365 {
366 try {
367 File file=new
368 File(filedialog_save.getDirectory(),filedialog_save.getFile());
369 tofile=new FileWriter(file);
370 out=new BufferedWriter(tofile);
371 out.write(text.getText(),0,(text.getText()).length());
372 out.flush();
373 out.close();
374 tofile.close();
375 }
376 catch(IOException e2){}
377 }
378 }
379 }
380}
381
382//例子9
383import java.awt.*;import java.io.*;
384import java.awt.event.*;
385public class Example20_9
386{ public static void main(String args[])
387 { try{
388 Runtime ce=Runtime.getRuntime();
389 ce.exec("java Example20_8");
390 File file=new File("c:/windows","Notepad.exe");
391 ce.exec(file.getAbsolutePath());
392 }
393 catch(Exception e){}
394 }
395}
396
397//例子10
398import java.io.*;
399public class Example20_10
400{ public static void main(String args[])
401 { RandomAccessFile in_and_out=null;
402 int data[]={1,2,3,4,5,6,7,8,9,10};
403 try{ in_and_out=new RandomAccessFile("tom.dat","rw");
404 }
405 catch(Exception e){}
406 try{ for(int i=0;i<data.length;i++)
407 { in_and_out.writeInt(data[i]);
408 }
409 for(long i=data.length-1;i>=0;i--) //一个int型数据占4个字节，我们从
410 { in_and_out.seek(i*4); //文件的第36个字节读取最后面的一个整数，
411 //每隔4个字节往前读取一个整数：
412 System.out.print(","+in_and_out.readInt());
413 }
414 in_and_out.close();
415 }
416 catch(IOException e){}
417 }
418}
419
420//例子11
421import java.io.*;
422class Example20_11
423{ public static void main(String args[])
424 { try{ RandomAccessFile in=new RandomAccessFile("Example20_11.java","rw");
425 long filePoint=0;
426 long fileLength=in.length();
427 while(filePoint<fileLength)
428 { String s=in.readLine();
429 System.out.println(s);
430 filePoint=in.getFilePointer();
431 }
432 in.close();
433 }
434 catch(Exception e){}
435 }
436}
437
438//例子12
439import java.io.*;
440import javax.swing.*;
441import java.awt.*;import
442java.awt.event.*;
443import javax.swing.border.*;
444class InputArea extends Panel
445implements ActionListener
446{ File f=null;
447 RandomAccessFile out;
448 Box baseBox ,boxV1,boxV2;
449 TextField name,email,phone;
450 Button button;
451 InputArea(File f)
452 { setBackground(Color.cyan);
453 this.f=f;
454 name=new TextField(12);
455 email=new TextField(12);
456 phone=new TextField(12);
457 button=new Button("录入");
458 button.addActionListener(this);
459 boxV1=Box.createVerticalBox();
460 boxV1.add(new Label("输入姓名"));
461 boxV1.add(Box.createVerticalStrut(8));
462 boxV1.add(new Label("输入email"));
463 boxV1.add(Box.createVerticalStrut(8));
464 boxV1.add(new Label("输入电话"));
465 boxV1.add(Box.createVerticalStrut(8));
466 boxV1.add(new Label("单击录入"));
467 boxV2=Box.createVerticalBox();
468 boxV2.add(name);
469 boxV2.add(Box.createVerticalStrut(8));
470 boxV2.add(email);
471 boxV2.add(Box.createVerticalStrut(8));
472 boxV2.add(phone);
473 boxV2.add(Box.createVerticalStrut(8));
474 boxV2.add(button);
475 baseBox=Box.createHorizontalBox();
476 baseBox.add(boxV1);
477 baseBox.add(Box.createHorizontalStrut(10));
478 baseBox.add(boxV2);
479 add(baseBox);
480 }
481 public void actionPerformed(ActionEvent e)
482 { try{
483 RandomAccessFile out=new RandomAccessFile(f,"rw");
484 if(f.exists())
485 { long length=f.length();
486 out.seek(length);
487 }
488 out.writeUTF("姓名:"+name.getText());
489 out.writeUTF("eamil:"+email.getText());
490 out.writeUTF("电话:"+phone.getText());
491 out.close();
492 }
493 catch(IOException ee){}
494 }
495}
496
497public class Example20_12 extends Frame implements ActionListener
498{ File file=null;
499 MenuBar bar;
500 Menu fileMenu;
501 MenuItem 录入,显示;
502 TextArea show;
503 InputArea inputMessage;
504 CardLayout card=null; //卡片式布局.
505 Panel pCenter;
506 Example20_12()
507 {
508 file=new File("通讯录.txt");
509 录入=new MenuItem("录入");
510 显示=new MenuItem("显示");
511 bar=new MenuBar();
512 fileMenu=new Menu("菜单选项");
513 fileMenu.add(录入);
514 fileMenu.add(显示);
515 bar.add(fileMenu);
516 setMenuBar(bar);
517 录入.addActionListener(this);
518 显示.addActionListener(this);
519 inputMessage=new InputArea(file);
520 show=new TextArea(12,20);
521 card=new CardLayout();
522 pCenter=new Panel();
523 pCenter.setLayout(card);
524 pCenter.add("录入",inputMessage);
525 pCenter.add("显示",show);
526
527 add(pCenter,BorderLayout.CENTER);
528 addWindowListener(new WindowAdapter()
529 { public void windowClosing(WindowEvent e)
530 {
531 System.exit(0);
532 }
533 });
534 setVisible(true);
535 setBounds(100,50,420,380);
536 validate();
537 }
538 public void actionPerformed(ActionEvent e)
539 {
540 if(e.getSource()==录入)
541 {
542 card.show(pCenter,"录入");
543 }
544 else if(e.getSource()==显示)
545 { int number=1;
546 card.show(pCenter,"显示");
547 try{ RandomAccessFile in=new RandomAccessFile(file,"r");
548 String 姓名=null;
549 while((姓名=in.readUTF())!=null)
550 { show.append("\n"+number+" "+姓名);
551 show.append(in.readUTF()); //读取email.
552 show.append(in.readUTF()); //读取phone
553 show.append("\n------------------------- ");
554 number++;
555 }
556 in.close();
557 }
558 catch(Exception ee){}
559 }
560 }
561 public static void main(String args[])
562 { new Example20_12();
563 }
564}
565
566//例子13
567import java.io.*;
568public class Example20_13
569{ public static void main(String args[])
570 { try
571 { FileOutputStream fos=new FileOutputStream("jerry.dat");
572 DataOutputStream out_data=new DataOutputStream(fos);
573 out_data.writeInt(100);out_data.writeInt(10012);
574 out_data.writeLong(123456);
575 out_data.writeFloat(3.1415926f); out_data.writeFloat(2.789f);
576 out_data.writeDouble(987654321.1234);
577 out_data.writeBoolean(true);out_data.writeBoolean(false);
578 out_data.writeChars("i am ookk");
579 }
580 catch(IOException e){}
581 try
582 { FileInputStream fis=new FileInputStream("jerry.dat");
583 DataInputStream in_data=new DataInputStream(fis);
584 System.out.println(":"+in_data.readInt());//读取第1个int整数。
585 System.out.println(":"+in_data.readInt());//读取第2个int整数。
586 System.out.println(":"+in_data.readLong()); //读取long整数 。
587 System.out.println(":"+in_data.readFloat());//读取第1个float数。
588 System.out.println(":"+in_data.readFloat());//读取第2个float数。
589 System.out.println(":"+in_data.readDouble());
590 System.out.println(":"+in_data.readBoolean());//读取第1个boolean。
591 System.out.println(":"+in_data.readBoolean());//读取第2个boolean。
592 char c;
593 while((c=in_data.readChar())!='\0') //'\0'表示空字符。
594 System.out.print(c);
595 }
596 catch(IOException e){}
597 }
598}
599
600//例子14
601import java.awt.*;import java.awt.event.*;
602import java.io.*;
603public class Example20_14 extends Frame implements ActionListener
604{ TextArea text=null; Button 读入=null,写出=null;
605 FileInputStream file_in=null; FileOutputStream file_out=null;
606 ObjectInputStream object_in=null; //对象输入流。
607 ObjectOutputStream object_out=null; //对象输出流。
608 Example20_14()
609 { setLayout(new FlowLayout()); text=new TextArea(6,10);
610 读入=new Button("读入对象"); 写出=new Button("写出对象");
611 读入.addActionListener(this);写出.addActionListener(this);
612 setVisible(true); add(text);add(读入);add(写出);
613 addWindowListener(new WindowAdapter()
614 { public void windowClosing(WindowEvent e)
615 { System.exit(0);
616 }
617 });
618 pack();setSize(300,300);
619 }
620 public void actionPerformed(ActionEvent e)
621 { if(e.getSource()==写出)
622 { try{ file_out=new FileOutputStream("tom.txt");
623 object_out=new ObjectOutputStream(file_out);//创建对象输出流。
624 object_out.writeObject(text); //写对象到文件中。
625 object_out.close();
626 }
627 catch(IOException event){}
628 }
629 else if(e.getSource()==读入)
630 { try{ file_in=new FileInputStream("tom.txt");
631 object_in=new ObjectInputStream(file_in); //创建对象输入流。
632 TextArea temp=(TextArea)object_in.readObject();//从文件中读入对象。
633 temp.setBackground(Color.pink); this.add(temp);//添加该对象到窗口。
634 this.pack();this.setSize(600,600);
635 object_in.close();
636 }
637 catch(ClassNotFoundException event)
638 { System.out.println("不能读出对象");
639 }
640 catch(IOException event)
641 { System.out.println("can not read file");
642 }
643 }
644 }
645 public static void main(String args[])
646 { Example20_14 win=new Example20_14();
647 }
648}
649
650//例子15
651import java.io.*;
652class Student implements Serializable//实现接口Serializable的Student类。
653{ String name=null;double height;
654 Student(String name,double height)
655 { this.name=name;this.height=height;
656 }
657 public void setHeight (double c)
658 { this.height=c;
659 }
660}
661public class Example20_15
662{ public static void main(String args[])
663 { Student zhang=new Student("zhang ping",1.65);
664 try{ FileOutputStream file_out=new FileOutputStream("s.txt");
665 ObjectOutputStream object_out=new ObjectOutputStream(file_out);
666 object_out.writeObject(zhang);
667 System.out.println(zhang.name+"的身高是："+zhang.height);
668 FileInputStream file_in=new FileInputStream("s.txt");
669 ObjectInputStream object_in=new ObjectInputStream(file_in);
670 zhang=(Student)object_in.readObject();
671 zhang.setHeight(1.78); //修改身高。
672 System.out.println(zhang.name+"现在的身高是："+zhang.height);
673 }
674 catch(ClassNotFoundException event)
675 { System.out.println("不能读出对象");
676 }
677 catch(IOException event)
678 { System.out.println("can not read file"+event);
679 }
680 }
681}
682
683//例子16
684import java.awt.*;import java.io.*;import java.awt.event.*;
685public class Example20_16
686{ public static void main(String args[])
687 { JDK f=new JDK();
688 f.pack();
689 f.addWindowListener(new WindowAdapter() //窗口增加适配器。
690 {public void windowClosing(WindowEvent e)
691 { System.exit(0);
692 }
693 });
694 f.setBounds(100,120,700,360);
695 f.setVisible(true);
696 }
697}
698class JDK extends Frame implements ActionListener,Runnable
699{ Thread compiler=null; //负责编译的线程。
700 Thread run_prom=null; //负责运行程序的线程。
701 boolean bn=true;
702 CardLayout mycard;
703 Panel p=new Panel();
704 File file_saved=null;
705 TextArea input_text=new TextArea(),//程序输入区。
706 compiler_text=new TextArea(), //编译出错显示区。
707 dos_out_text=new TextArea(); //程序运行时，负责显示在dos窗口的输出信息。
708 Button button_input_text,button_compiler_text,
709 button_compiler,button_run_prom,button_see_doswin;
710 TextField input_flie_name_text=new TextField("输入被编译的文件名字.java");
711 TextField run_file_name_text=new TextField("输入应用程序主类的名字");
712 JDK()
713 { super("Java编程小软件");
714 mycard=new CardLayout();
715 compiler=new Thread(this);
716 run_prom=new Thread(this);
717 button_input_text=new Button("程序输入区(白色)");
718 button_compiler_text=new Button("编译结果区(粉色)");
719 button_compiler=new Button("编译程序");
720 button_run_prom=new Button("运行应用程序");
721 button_see_doswin=new Button("查看应用程序运行时在dos窗口输出的信息");
722 p.setLayout(mycard);
723 p.add("input",input_text);p.add("compiler",compiler_text);
724 p.add("dos",dos_out_text);
725 add(p,"Center");
726 add( button_see_doswin,"South");
727 compiler_text.setBackground(Color.pink);
728 dos_out_text.setBackground(Color.blue);
729 Panel p1=new Panel();p1.setLayout(new GridLayout(4,2));
730 p1.add(new Label("按扭输入源程序："));p1.add(button_input_text);
731 p1.add(new Label("按扭看编译结果："));p1.add(button_compiler_text);
732 p1.add(input_flie_name_text); p1.add(button_compiler);
733 p1.add(run_file_name_text); p1.add(button_run_prom);
734 add(p1,BorderLayout.NORTH);
735 button_input_text.addActionListener(this);
736 button_compiler_text.addActionListener(this);
737 button_compiler.addActionListener(this);
738 button_run_prom.addActionListener(this);
739 button_see_doswin.addActionListener(this);
740 }
741 public void actionPerformed(ActionEvent e)
742 { if(e.getSource()==button_input_text)
743 { mycard.show(p,"input");
744 }
745 else if(e.getSource()==button_compiler_text)
746 { mycard.show(p,"compiler");
747 }
748 else if(e.getSource()==button_see_doswin)
749 { mycard.show(p,"dos");
750 }
751 else if(e.getSource()==button_compiler)
752 { if(!(compiler.isAlive()))
753 { compiler=new Thread(this);
754 }
755 try{ compiler.start();
756 }
757 catch(Exception eee){}
758 mycard.show(p,"compiler");
759 }
760 else if(e.getSource()==button_run_prom)
761 { if(!(run_prom.isAlive()))
762 { run_prom =new Thread(this);
763 }
764 try{ run_prom.start();
765 }
766 catch(Exception eee){}
767 mycard.show(p,"dos");
768 }
769 }
770 public void run()
771 { if(Thread.currentThread()==compiler)
772 { compiler_text.setText(null);
773 String temp=input_text.getText().trim();
774 byte buffer[]=temp.getBytes();
775 int b=buffer.length;
776 String flie_name=input_flie_name_text.getText().trim();
777 try{ file_saved=new File(flie_name);
778 FileOutputStream writefile=new FileOutputStream(file_saved);
779 writefile.write(buffer,0,b);writefile.close();
780 }
781 catch(IOException e5)
782 { System.out.println("Error ");
783 }
784 try{ Runtime ce=Runtime.getRuntime();
785 InputStream in=
786 ce.exec("javac "+flie_name).getErrorStream();
787 BufferedInputStream bin=new BufferedInputStream(in);
788 byte shuzu[]=new byte[100];
789 int n;boolean bn=true;
790 while((n=bin.read(shuzu,0,100))!=-1)
791 { String s=null;
792 s=new String(shuzu,0,n);
793 compiler_text.append(s);
794 if(s!=null) bn=false;
795 }
796 if(bn)
797 { compiler_text.append("编译正确");
798 }
799 }
800 catch(IOException e1){}
801 }
802 else if(Thread.currentThread()==run_prom)
803 { dos_out_text.setText(null);
804 try{ Runtime ce=Runtime.getRuntime();
805 String path=run_file_name_text.getText().trim();
806 InputStream in=ce.exec("java "+path).getInputStream();
807 BufferedInputStream bin=new BufferedInputStream(in);
808 byte zu[]=new byte[150];
809 int m;String s=null;
810 while((m=bin.read(zu,0,150))!=-1)
811 { s=new String(zu,0,m);
812 dos_out_text.append(s);
813 }
814 }
815 catch(IOException e1){}
816 }
817 }
818}
819
//例子12
import java.io.*;3
class Example20_1 4
{ public static void main(String args[])
5
{ File f1=new File("F:\\8000","Example20_1.java");
6
File f2=new File("F:\\8000");7
System.out.println("文件Example20_1是可读的吗:"+f1.canRead());8
System.out.println("文件Example20_1的长度:"+f1.length());9
System.out.println("文件Example20_1的绝对路径:"+f1.getAbsolutePath());10
System.out.println("F:\\8000:是目录吗？"+f2.isDirectory());11
}12
}13
14
//例子215
import java.io.*;16
class FileAccept implements FilenameFilter 17
{ String str=null;18
FileAccept(String s)19
{ str="."+s;20
}21
public boolean accept(File dir,String name)22
{ return name.endsWith(str);23
} 24
}25
public class Example20_226
{ public static void main(String args[])27
{ File dir=new File("F:/8000");28
FileAccept acceptCondition=new FileAccept("java");29
String fileName[]=dir.list(acceptCondition);30
for(int i=0;i<5;i++)31
{ System.out.println(fileName[i]);32
}33
}34
}35
36
//例子337
import java.io.*;import java.awt.*;import java.awt.event.*;38
class Example20_339
{ public static void main(String args[])40
{ int b;41
TextArea text;42
Frame window=new Frame();43
byte tom[]=new byte[25];44
window.setSize(100,100);text=new TextArea(10,16);45
window.setVisible(true);window.add(text,BorderLayout.CENTER);46
window.pack();47
window.addWindowListener(new WindowAdapter()48
{ public void windowClosing(WindowEvent e)49
{ System.exit(0);50
}51
}); 52
53
try{ File f=new File("F:\\8000","Example20_1.java");54
FileInputStream readfile=new FileInputStream(f);55
while((b=readfile.read(tom,0,25))!=-1) 56
{57
String s=new String (tom,0,b);58
System.out.println(s);59
text.append(s); 60
}61
readfile.close();62
}63
catch(IOException e)64
{ System.out.println("File read Error");65
}66
}67
}68
69
//例子470
import java.io.*;71
class Example20_472
{ public static void main(String args[])73
{ int b;74
byte buffer[]=new byte[100];75
try{ System.out.println("输入一行文本，并存入磁盘：");76
b=System.in.read(buffer); //把从键盘敲入的字符存入buffer。77
FileOutputStream writefile=new FileOutputStream("line.txt");78
writefile.write(buffer,0,b); // 通过流把 buffer写入到文件line.txt。79
}80
catch(IOException e)81
{ System.out.println("Error ");82
}83
}84
}85
86
//例子587
import java.io.*;import java.awt.*;import java.awt.event.*;88
class Example20_589
{ public static void main(String args[])90
{ char a[]="今晚10点发起总攻".toCharArray(); 91
int n=0,m=0;92
try{ File f=new File("F:\\8000","secret.txt");93
for(int i=0;i<a.length;i++)94
{ a[i]=(char)(a[i]^'R');95
}96
FileWriter out=new FileWriter(f);97
out.write(a,0,a.length);98
out.close();99
FileReader in=new FileReader(f);100
int length=(int)f.length();101
char tom[]=new char[length];102
while((n=in.read(tom,0,length))!=-1) 103
{ String s=new String (tom,0,n);104
m=n; 105
System.out.println("密文:"+s);106
}107
in.close();108
for(int i=0;i<m;i++)109
{ tom[i]=(char)(tom[i]^'R');110
}111
String 明文=new String(tom,0,m);112
System.out.println("明文:"+明文);113
}114
catch(IOException e)115
{ System.out.println("File read Error");116
}117
}118
}119
120
//例子6121
import java.io.*;122
import java.awt.*;123
import java.awt.event.*;124
class EWindow extends Frame implements ActionListener125
{ TextArea text; 126
Button buttonRead,buttonWrite;127
BufferedReader bufferIn; 128
FileReader in;129
BufferedWriter bufferOut; 130
FileWriter out;131
EWindow()132
{ super("流的读取");133
text=new TextArea(10,10);text.setBackground(Color.cyan);134
buttonRead =new Button("读取"); 135
buttonRead.addActionListener(this);136
buttonWrite =new Button("写出"); 137
buttonWrite.addActionListener(this);138
setLayout(new BorderLayout());139
setSize(340,340);140
setVisible(true);141
add(text,BorderLayout.CENTER);142
Panel pNorth=new Panel();143
pNorth.add(buttonRead);pNorth.add(buttonWrite);144
pNorth.validate();145
add(BorderLayout.NORTH,pNorth);146
addWindowListener(new WindowAdapter()147
{ public void windowClosing(WindowEvent e)148
{ System.exit(0);149
}150
});151
} 152
public void actionPerformed(ActionEvent e)153
{ String s;154
if(e.getSource()==buttonRead)155
{ try{ text.setText(null);156
File f=new File("F:\\8000\\","E.java");157
in=new FileReader(f);158
bufferIn=new BufferedReader(in);159
while((s=bufferIn.readLine())!=null)160
{ text.append(s+'\n'); 161
}162
bufferIn.close();163
in.close();164
}165
catch(IOException exp){System.out.println(exp);} 166
}167
if(e.getSource()==buttonWrite)168
{ try { File f=new File("F:\\8000\\","E.java");169
FileWriter out=new FileWriter(f);170
BufferedWriter bufferOut=new BufferedWriter(out);171
bufferOut.write(text.getText(),0,(text.getText()).length());172
bufferOut.flush();173
bufferOut.close();174
out.close();175
}176
catch(IOException exp){ System.out.println(exp);}177
}178
}179
}180
public class Example20_6181
{ public static void main(String args[])182
{ EWindow w=new EWindow();183
w.validate();184
}185
}186
187
//例子7188
import java.util.*;import java.io.*;189
import java.awt.*;import java.awt.event.*;190
class EWindow extends Frame implements ActionListener,ItemListener191
{ String str[]=new String[7];String s;192
FileReader file;193
BufferedReader in; 194
Button start,next;195
Checkbox box[];196
TextField 题目,分数;197
int score=0; 198
CheckboxGroup age=new CheckboxGroup();199
EWindow()200
{ super("英语单词学习");201
分数=new TextField(10);题目=new TextField(70);202
start=new Button("重新练习");start.addActionListener(this);203
next=new Button("下一题目");next.addActionListener(this);204
box=new Checkbox[4];205
for(int i=0;i<=3;i++)206
{ box[i]=new Checkbox("",false,age);207
box[i].addItemListener(this); 208
} 209
try { file=new FileReader("English.txt");210
in=new BufferedReader(file);211
}212
catch(IOException e){} 213
setBounds(100,100,400,320); setVisible(true);214
setLayout(new GridLayout(4,1));215
setBackground(Color.pink);216
Panel p1=new Panel(),p2=new Panel(),217
p3=new Panel() ,p4=new Panel(),p5=new Panel();218
p1.add(new Label("题目:"));p1.add(题目);219
p2.add(new Label("选择答案：")); 220
for(int i=0;i<=3;i++)221
{ p2.add(box[i]);222
} 223
p3.add(new Label("您的得分:"));p3.add(分数);224
p4.add(start); p4.add(next);225
add(p1); add(p2);add(p3); add(p4);226
addWindowListener(new WindowAdapter()227
{public void windowClosing(WindowEvent e)228
{ System.exit(0); 229
}230
});231
reading();232
} 233
public void reading()234
{ int i=0; 235
try { s=in.readLine();236
if(!(s.startsWith("endend")))237
{ StringTokenizer tokenizer=new StringTokenizer(s,"#"); 238
while(tokenizer.hasMoreTokens())239
{ str[i]=tokenizer.nextToken();240
i++;241
}242
题目.setText(str[0]);243
for(int j=1;j<=4;j++)244
{ box[j-1].setLabel(str[j]);245
} 246
}247
else if(s.startsWith("endend"))248
{ 题目.setText("学习完毕"); 249
for(int j=0;j<4;j++)250
{ box[j].setLabel("end"); 251
in.close();file.close();252
} 253
}254
}255
catch(Exception exp){ 题目.setText("无试题文件") ; } 256
}257
public void actionPerformed(ActionEvent event)258
{ if(event.getSource()==start)259
{ score=0;260
分数.setText("得分： "+score);261
try { file=new FileReader("English.txt");262
in=new BufferedReader(file);263
}264
catch(IOException e){} 265
reading(); 266
}267
if(event.getSource()==next)268
{ reading();269
for(int j=0;j<4;j++)270
{ 271
box[j].setEnabled(true); 272
}273
}274
}275
public void itemStateChanged(ItemEvent e)276
{ for(int j=0;j<4;j++)277
{ if(box[j].getLabel().equals(str[5])&&box[j].getState())278
{ score++;279
分数.setText("得分： "+score);280
}281
box[j].setEnabled(false); 282
}283
}284
}285
public class Example20_7286
{ public static void main(String args[])287
{ EWindow w=new EWindow();288
w.pack();289
}290
}291
292
//例子8293
import java.awt.*;import java.io.*;294
import java.awt.event.*;295
public class Example20_8296
{ public static void main(String args[])297
{ FileWindows win=new FileWindows();298
}299
}300
class FileWindows extends Frame implements ActionListener301
{ FileDialog filedialog_save,filedialog_load;//声明2个文件对话筐302
MenuBar menubar;303
Menu menu;304
MenuItem itemOpen,itemSave;305
TextArea text;306
BufferedReader in; 307
FileReader file_reader;308
BufferedWriter out; 309
FileWriter tofile;310
FileWindows()311
{ super("带文件对话框的窗口"); 312
setSize(260,270); 313
setVisible(true); 314
menubar=new MenuBar(); 315
menu=new Menu("文件"); 316
itemOpen=new MenuItem("打开文件");317
itemSave=new MenuItem("保存文件"); 318
itemOpen.addActionListener(this); 319
itemSave.addActionListener(this);320
menu.add(itemOpen);321
menu.add(itemSave); 322
menubar.add(menu); 323
setMenuBar(menubar); 324
filedialog_save=new FileDialog(this,"保存文件话框",FileDialog.SAVE);325
filedialog_load=new FileDialog(this,"打开文件话框",FileDialog.LOAD);326
filedialog_save.addWindowListener(new WindowAdapter()327
{public void windowClosing(WindowEvent e)328
{ filedialog_save.setVisible(false);329
}330
});331
filedialog_load.addWindowListener(new WindowAdapter()//对话框增加适配器332
{public void windowClosing(WindowEvent e)333
{ filedialog_load.setVisible(false);334
}335
});336
addWindowListener(new WindowAdapter() 337
{public void windowClosing(WindowEvent e)338
{ System.exit(0);}339
});340
text=new TextArea(10,10);341
add(text,BorderLayout.CENTER);342
}343
public void actionPerformed(ActionEvent e) 344
{ if(e.getSource()==itemOpen)345
{ filedialog_load.setVisible(true);346
text.setText(null);347
String s;348
if(filedialog_load.getFile()!=null)349
{350
try{ File file= new 351
File(filedialog_load.getDirectory(),filedialog_load.getFile());352
file_reader=new FileReader(file);353
in=new BufferedReader(file_reader);354
while((s=in.readLine())!=null)355
text.append(s+'\n'); 356
in.close();357
file_reader.close();358
}359
catch(IOException e2){}360
}361
}362
else if(e.getSource()==itemSave)363
{ filedialog_save.setVisible(true);364
if(filedialog_save.getFile()!=null)365
{366
try {367
File file=new368
File(filedialog_save.getDirectory(),filedialog_save.getFile());369
tofile=new FileWriter(file);370
out=new BufferedWriter(tofile);371
out.write(text.getText(),0,(text.getText()).length());372
out.flush();373
out.close();374
tofile.close();375
}376
catch(IOException e2){}377
}378
}379
} 380
}381
382
//例子9383
import java.awt.*;import java.io.*;384
import java.awt.event.*;385
public class Example20_9386
{ public static void main(String args[])387
{ try{388
Runtime ce=Runtime.getRuntime();389
ce.exec("java Example20_8");390
File file=new File("c:/windows","Notepad.exe");391
ce.exec(file.getAbsolutePath());392
}393
catch(Exception e){} 394
} 395
}396
397
//例子10398
import java.io.*;399
public class Example20_10400
{ public static void main(String args[])401
{ RandomAccessFile in_and_out=null;402
int data[]={1,2,3,4,5,6,7,8,9,10};403
try{ in_and_out=new RandomAccessFile("tom.dat","rw");404
}405
catch(Exception e){}406
try{ for(int i=0;i<data.length;i++)407
{ in_and_out.writeInt(data[i]);408
} 409
for(long i=data.length-1;i>=0;i--) //一个int型数据占4个字节，我们从410
{ in_and_out.seek(i*4); //文件的第36个字节读取最后面的一个整数，411
//每隔4个字节往前读取一个整数：412
System.out.print(","+in_and_out.readInt());413
}414
in_and_out.close();415
}416
catch(IOException e){} 417
}418
}419
420
//例子11421
import java.io.*;422
class Example20_11 423
{ public static void main(String args[])424
{ try{ RandomAccessFile in=new RandomAccessFile("Example20_11.java","rw");425
long filePoint=0;426
long fileLength=in.length();427
while(filePoint<fileLength)428
{ String s=in.readLine();429
System.out.println(s);430
filePoint=in.getFilePointer();431
}432
in.close();433
}434
catch(Exception e){}435
}436
}437
438
//例子12439
import java.io.*;440
import javax.swing.*;441
import java.awt.*;import 442
java.awt.event.*;443
import javax.swing.border.*;444
class InputArea extends Panel 445
implements ActionListener446
{ File f=null;447
RandomAccessFile out;448
Box baseBox ,boxV1,boxV2; 449
TextField name,email,phone;450
Button button;451
InputArea(File f)452
{ setBackground(Color.cyan);453
this.f=f;454
name=new TextField(12);455
email=new TextField(12); 456
phone=new TextField(12);457
button=new Button("录入");458
button.addActionListener(this);459
boxV1=Box.createVerticalBox();460
boxV1.add(new Label("输入姓名"));461
boxV1.add(Box.createVerticalStrut(8));462
boxV1.add(new Label("输入email"));463
boxV1.add(Box.createVerticalStrut(8));464
boxV1.add(new Label("输入电话"));465
boxV1.add(Box.createVerticalStrut(8));466
boxV1.add(new Label("单击录入"));467
boxV2=Box.createVerticalBox();468
boxV2.add(name);469
boxV2.add(Box.createVerticalStrut(8));470
boxV2.add(email);471
boxV2.add(Box.createVerticalStrut(8));472
boxV2.add(phone);473
boxV2.add(Box.createVerticalStrut(8));474
boxV2.add(button);475
baseBox=Box.createHorizontalBox();476
baseBox.add(boxV1);477
baseBox.add(Box.createHorizontalStrut(10));478
baseBox.add(boxV2);479
add(baseBox); 480
}481
public void actionPerformed(ActionEvent e)482
{ try{483
RandomAccessFile out=new RandomAccessFile(f,"rw");484
if(f.exists())485
{ long length=f.length();486
out.seek(length);487
}488
out.writeUTF("姓名:"+name.getText());489
out.writeUTF("eamil:"+email.getText());490
out.writeUTF("电话:"+phone.getText());491
out.close();492
}493
catch(IOException ee){}494
}495
}496
497
public class Example20_12 extends Frame implements ActionListener498
{ File file=null;499
MenuBar bar;500
Menu fileMenu;501
MenuItem 录入,显示;502
TextArea show;503
InputArea inputMessage;504
CardLayout card=null; //卡片式布局.505
Panel pCenter;506
Example20_12()507
{ 508
file=new File("通讯录.txt");509
录入=new MenuItem("录入");510
显示=new MenuItem("显示");511
bar=new MenuBar();512
fileMenu=new Menu("菜单选项");513
fileMenu.add(录入);514
fileMenu.add(显示);515
bar.add(fileMenu);516
setMenuBar(bar);517
录入.addActionListener(this);518
显示.addActionListener(this);519
inputMessage=new InputArea(file);520
show=new TextArea(12,20); 521
card=new CardLayout();522
pCenter=new Panel();523
pCenter.setLayout(card);524
pCenter.add("录入",inputMessage);525
pCenter.add("显示",show);526
527
add(pCenter,BorderLayout.CENTER);528
addWindowListener(new WindowAdapter()529
{ public void windowClosing(WindowEvent e)530
{531
System.exit(0);532
}533
});534
setVisible(true);535
setBounds(100,50,420,380);536
validate();537
}538
public void actionPerformed(ActionEvent e)539
{540
if(e.getSource()==录入)541
{542
card.show(pCenter,"录入");543
}544
else if(e.getSource()==显示)545
{ int number=1;546
card.show(pCenter,"显示");547
try{ RandomAccessFile in=new RandomAccessFile(file,"r");548
String 姓名=null; 549
while((姓名=in.readUTF())!=null) 550
{ show.append("\n"+number+" "+姓名);551
show.append(in.readUTF()); //读取email.552
show.append(in.readUTF()); //读取phone553
show.append("\n------------------------- ");554
number++;555
}556
in.close();557
}558
catch(Exception ee){}559
}560
}561
public static void main(String args[])562
{ new Example20_12();563
}564
}565
566
//例子13567
import java.io.*;568
public class Example20_13569
{ public static void main(String args[])570
{ try 571
{ FileOutputStream fos=new FileOutputStream("jerry.dat");572
DataOutputStream out_data=new DataOutputStream(fos);573
out_data.writeInt(100);out_data.writeInt(10012);574
out_data.writeLong(123456); 575
out_data.writeFloat(3.1415926f); out_data.writeFloat(2.789f);576
out_data.writeDouble(987654321.1234);577
out_data.writeBoolean(true);out_data.writeBoolean(false);578
out_data.writeChars("i am ookk");579
} 580
catch(IOException e){}581
try582
{ FileInputStream fis=new FileInputStream("jerry.dat");583
DataInputStream in_data=new DataInputStream(fis);584
System.out.println(":"+in_data.readInt());//读取第1个int整数。585
System.out.println(":"+in_data.readInt());//读取第2个int整数。586
System.out.println(":"+in_data.readLong()); //读取long整数 。587
System.out.println(":"+in_data.readFloat());//读取第1个float数。588
System.out.println(":"+in_data.readFloat());//读取第2个float数。589
System.out.println(":"+in_data.readDouble()); 590
System.out.println(":"+in_data.readBoolean());//读取第1个boolean。591
System.out.println(":"+in_data.readBoolean());//读取第2个boolean。592
char c;593
while((c=in_data.readChar())!='\0') //'\0'表示空字符。594
System.out.print(c);595
} 596
catch(IOException e){}597
}598
}599
600
//例子14601
import java.awt.*;import java.awt.event.*;602
import java.io.*;603
public class Example20_14 extends Frame implements ActionListener604
{ TextArea text=null; Button 读入=null,写出=null;605
FileInputStream file_in=null; FileOutputStream file_out=null;606
ObjectInputStream object_in=null; //对象输入流。607
ObjectOutputStream object_out=null; //对象输出流。608
Example20_14()609
{ setLayout(new FlowLayout()); text=new TextArea(6,10);610
读入=new Button("读入对象"); 写出=new Button("写出对象");611
读入.addActionListener(this);写出.addActionListener(this);612
setVisible(true); add(text);add(读入);add(写出);613
addWindowListener(new WindowAdapter()614
{ public void windowClosing(WindowEvent e)615
{ System.exit(0);616
}617
});618
pack();setSize(300,300);619
}620
public void actionPerformed(ActionEvent e)621
{ if(e.getSource()==写出)622
{ try{ file_out=new FileOutputStream("tom.txt");623
object_out=new ObjectOutputStream(file_out);//创建对象输出流。624
object_out.writeObject(text); //写对象到文件中。625
object_out.close();626
}627
catch(IOException event){}628
}629
else if(e.getSource()==读入)630
{ try{ file_in=new FileInputStream("tom.txt");631
object_in=new ObjectInputStream(file_in); //创建对象输入流。632
TextArea temp=(TextArea)object_in.readObject();//从文件中读入对象。633
temp.setBackground(Color.pink); this.add(temp);//添加该对象到窗口。634
this.pack();this.setSize(600,600);635
object_in.close();636
}637
catch(ClassNotFoundException event)638
{ System.out.println("不能读出对象");639
}640
catch(IOException event)641
{ System.out.println("can not read file");642
}643
}644
}645
public static void main(String args[])646
{ Example20_14 win=new Example20_14();647
}648
}649
650
//例子15651
import java.io.*;652
class Student implements Serializable//实现接口Serializable的Student类。653
{ String name=null;double height; 654
Student(String name,double height)655
{ this.name=name;this.height=height;656
}657
public void setHeight (double c)658
{ this.height=c;659
}660
}661
public class Example20_15662
{ public static void main(String args[])663
{ Student zhang=new Student("zhang ping",1.65);664
try{ FileOutputStream file_out=new FileOutputStream("s.txt");665
ObjectOutputStream object_out=new ObjectOutputStream(file_out);666
object_out.writeObject(zhang); 667
System.out.println(zhang.name+"的身高是："+zhang.height); 668
FileInputStream file_in=new FileInputStream("s.txt");669
ObjectInputStream object_in=new ObjectInputStream(file_in);670
zhang=(Student)object_in.readObject();671
zhang.setHeight(1.78); //修改身高。672
System.out.println(zhang.name+"现在的身高是："+zhang.height);673
}674
catch(ClassNotFoundException event)675
{ System.out.println("不能读出对象");676
}677
catch(IOException event)678
{ System.out.println("can not read file"+event);679
}680
}681
}682
683
//例子16684
import java.awt.*;import java.io.*;import java.awt.event.*;685
public class Example20_16686
{ public static void main(String args[])687
{ JDK f=new JDK();688
f.pack();689
f.addWindowListener(new WindowAdapter() //窗口增加适配器。690
{public void windowClosing(WindowEvent e)691
{ System.exit(0);692
}693
});694
f.setBounds(100,120,700,360);695
f.setVisible(true);696
}697
}698
class JDK extends Frame implements ActionListener,Runnable699
{ Thread compiler=null; //负责编译的线程。700
Thread run_prom=null; //负责运行程序的线程。701
boolean bn=true;702
CardLayout mycard;703
Panel p=new Panel();704
File file_saved=null;705
TextArea input_text=new TextArea(),//程序输入区。706
compiler_text=new TextArea(), //编译出错显示区。707
dos_out_text=new TextArea(); //程序运行时，负责显示在dos窗口的输出信息。708
Button button_input_text,button_compiler_text,709
button_compiler,button_run_prom,button_see_doswin;710
TextField input_flie_name_text=new TextField("输入被编译的文件名字.java");711
TextField run_file_name_text=new TextField("输入应用程序主类的名字");712
JDK()713
{ super("Java编程小软件");714
mycard=new CardLayout();715
compiler=new Thread(this);716
run_prom=new Thread(this);717
button_input_text=new Button("程序输入区(白色)");718
button_compiler_text=new Button("编译结果区(粉色)");719
button_compiler=new Button("编译程序");720
button_run_prom=new Button("运行应用程序");721
button_see_doswin=new Button("查看应用程序运行时在dos窗口输出的信息");722
p.setLayout(mycard);723
p.add("input",input_text);p.add("compiler",compiler_text);724
p.add("dos",dos_out_text);725
add(p,"Center");726
add( button_see_doswin,"South"); 727
compiler_text.setBackground(Color.pink);728
dos_out_text.setBackground(Color.blue);729
Panel p1=new Panel();p1.setLayout(new GridLayout(4,2));730
p1.add(new Label("按扭输入源程序："));p1.add(button_input_text);731
p1.add(new Label("按扭看编译结果："));p1.add(button_compiler_text); 732
p1.add(input_flie_name_text); p1.add(button_compiler);733
p1.add(run_file_name_text); p1.add(button_run_prom);734
add(p1,BorderLayout.NORTH); 735
button_input_text.addActionListener(this);736
button_compiler_text.addActionListener(this);737
button_compiler.addActionListener(this); 738
button_run_prom.addActionListener(this);739
button_see_doswin.addActionListener(this);740
}741
public void actionPerformed(ActionEvent e) 742
{ if(e.getSource()==button_input_text)743
{ mycard.show(p,"input");744
}745
else if(e.getSource()==button_compiler_text)746
{ mycard.show(p,"compiler");747
}748
else if(e.getSource()==button_see_doswin)749
{ mycard.show(p,"dos");750
}751
else if(e.getSource()==button_compiler)752
{ if(!(compiler.isAlive()))753
{ compiler=new Thread(this);754
}755
try{ compiler.start();756
}757
catch(Exception eee){}758
mycard.show(p,"compiler");759
}760
else if(e.getSource()==button_run_prom)761
{ if(!(run_prom.isAlive()))762
{ run_prom =new Thread(this);763
}764
try{ run_prom.start();765
}766
catch(Exception eee){} 767
mycard.show(p,"dos");768
}769
}770
public void run()771
{ if(Thread.currentThread()==compiler)772
{ compiler_text.setText(null); 773
String temp=input_text.getText().trim(); 774
byte buffer[]=temp.getBytes(); 775
int b=buffer.length;776
String flie_name=input_flie_name_text.getText().trim();777
try{ file_saved=new File(flie_name);778
FileOutputStream writefile=new FileOutputStream(file_saved);779
writefile.write(buffer,0,b);writefile.close();780
}781
catch(IOException e5)782
{ System.out.println("Error ");783
}784
try{ Runtime ce=Runtime.getRuntime();785
InputStream in=786
ce.exec("javac "+flie_name).getErrorStream();787
BufferedInputStream bin=new BufferedInputStream(in);788
byte shuzu[]=new byte[100];789
int n;boolean bn=true;790
while((n=bin.read(shuzu,0,100))!=-1)791
{ String s=null;792
s=new String(shuzu,0,n);793
compiler_text.append(s);794
if(s!=null) bn=false;795
}796
if(bn) 797
{ compiler_text.append("编译正确"); 798
} 799
} 800
catch(IOException e1){} 801
}802
else if(Thread.currentThread()==run_prom)803
{ dos_out_text.setText(null);804
try{ Runtime ce=Runtime.getRuntime();805
String path=run_file_name_text.getText().trim();806
InputStream in=ce.exec("java "+path).getInputStream();807
BufferedInputStream bin=new BufferedInputStream(in);808
byte zu[]=new byte[150];809
int m;String s=null;810
while((m=bin.read(zu,0,150))!=-1)811
{ s=new String(zu,0,m);812
dos_out_text.append(s);813
}814
} 815
catch(IOException e1){} 816
} 817
}818
}819
