JAVA - 随笔分类 - archur_code

java UDP通信

摘要：服务器端：public class UDPServer{public static void main(String[] args) throws Exception{byte buf[] = new byte[1024];DatagramPacket dp = new DatagramPacket... 阅读全文

posted @ 2014-09-27 22:31 archur_code 阅读(235) 评论(0) 推荐(0)

java TCP通信

摘要：服务器端：public class TCPServer{ public static void main(String[]args){ ServerSocket ss = new ServerSocket(6666); while(true){ Socket s = ss.a... 阅读全文

posted @ 2014-09-27 22:27 archur_code 阅读(184) 评论(0) 推荐(0)

java 线程sleep方法

摘要：public static void main(String[] args) {Runner1 r1 = new Runner1();Thread t = new Thread(r1);t.start();try {Thread.sleep(10000);} catch (InterruptedEx... 阅读全文

posted @ 2014-09-25 19:09 archur_code 阅读(153) 评论(0) 推荐(0)

java 线程1

摘要：public static void main(String[] args) {Runner1 r1 = new Runner1();Thread t = new Thread(r1);t.start();for (int i = 0; i "+i);}}//Runner1实现Runable接口cl... 阅读全文

posted @ 2014-09-25 17:19 archur_code 阅读(155) 评论(0) 推荐(0)

Java TestMap

摘要：private static final Integer ONE = new Integer(1);public static void main(String[] args) {Map m = new HashMap();for (int i = 0; i < args.length; i++) ... 阅读全文

posted @ 2014-09-23 21:26 archur_code 阅读(117) 评论(0) 推荐(0)

Java TestDataStream

摘要：public static void main(String[] args) throws IOException {ByteArrayOutputStream baos = new ByteArrayOutputStream();DataOutputStream dos = new DataOut... 阅读全文

posted @ 2014-09-23 21:25 archur_code 阅读(154) 评论(0) 推荐(0)

Java TestTransform

摘要：public static void main(String[] args) throws IOException {InputStreamReader isr = new InputStreamReader(System.in); BufferedReader br = new BufferedR... 阅读全文

posted @ 2014-09-23 21:24 archur_code 阅读(113) 评论(0) 推荐(0)

java FileReaderWriter

摘要：public static void main(String[] args) throws IOException {FileReader fr = new FileReader("C:/Users/宇超/Desktop/hello.txt");FileWriter fw = new FileWri... 阅读全文

posted @ 2014-09-23 21:23 archur_code 阅读(104) 评论(0) 推荐(0)

Java TestBufferRW

摘要：public static void main(String[] args) throws IOException {BufferedWriter bw = new BufferedWriter(new FileWriter("C:/Users/宇超/Desktop/rand.txt"));Buff... 阅读全文

posted @ 2014-09-23 21:22 archur_code 阅读(105) 评论(0) 推荐(0)

Java TestInputStream

摘要：public static void main(String[] args) throws IOException {FileInputStream in = null;FileOutputStream out = null;int b=0;in = new FileInputStream("C:\... 阅读全文

posted @ 2014-09-23 21:21 archur_code 阅读(163) 评论(0) 推荐(0)

Java实例对象间的比较（实现Comparable接口）

摘要：intcompareTo(To)Compares this object with the specified object for order. Returns a negative integer, zero, or a positive integer as this object is le... 阅读全文

posted @ 2014-09-22 20:15 archur_code 阅读(278) 评论(0) 推荐(0)

java 枚举

摘要：public enum Mycolor{red,green,blue};//定义一种新类型阅读全文

posted @ 2014-09-20 20:41 archur_code 阅读(86) 评论(0) 推荐(0)

递归列出文件树

摘要：private static void tree(File f,int level){String preStr = "";for (int i = 0; i < level; i++) {preStr+=" ";}File [] childs = f.listFiles();for (int i ... 阅读全文

posted @ 2014-09-20 16:42 archur_code 阅读(87) 评论(0) 推荐(0)

文件操作（创建和写）

摘要：String separator = File.separator;String filename = "myfile.txt";String dir = "mydir1"+separator+"mydir2";File f = new File(dir,filename);if(f.exists... 阅读全文

posted @ 2014-09-20 16:33 archur_code 阅读(160) 评论(0) 推荐(0)

将给定字符串转换成double型数组

摘要：public static void main(String[] args) {String str = "1,2,3;4,5;6,7,8,9";String[] s1 = str.split(";");double [][]d;d = new double[s1.length][];for (in... 阅读全文

posted @ 2014-09-20 16:10 archur_code 阅读(1858) 评论(0) 推荐(0)

StringBuffer 的使用

摘要：java.lang.StringBuffer可变的字符串String之间的连接是通过开辟一块新的内存让后将它们拷贝进来StringBuffer则可以直接在后面追加方法: append(charc) delete(intstart, intend) insert(intoffset... 阅读全文

posted @ 2014-09-20 15:26 archur_code 阅读(131) 评论(0) 推荐(0)

String subString方法

摘要：package 字符串2;public class TestString {public static void main(String[] args) { String str = "Returns a new character sequence that is a subsequence of... 阅读全文

posted @ 2014-09-20 14:52 archur_code 阅读(126) 评论(0) 推荐(0)

String 学习1（split valueof）

摘要：Strings are constant; their values cannot be changed after they are created String s1 = "Hello";String s2 = "Hello";System.out.println(s1==s2); //true... 阅读全文

posted @ 2014-09-20 14:27 archur_code 阅读(150) 评论(0) 推荐(0)

随笔分类 - JAVA

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