Java 7 day 

 1 package Joker;
 2 
 3 import java.io.File;
 4 import java.io.FileOutputStream;
 5 import java.io.IOException;
 6 
 7 /*
 8  * FileOutputStream
 9  * write(int b):写出一个字符内容
10  * write(byte[] b):写出输出的所有内容
11  * write(byte[] b，int off,int len):
12  * 
13  * getByte:字符串转换成字符数组
14  * 
15  * close:彻底关闭
16  * 
17  * flush:清空
18  */
19 public class XXX {
20     public static void main(String[] args) throws IOException {
21         File f=new File("C:\\Users\\Administrator\\a");
22         boolean a=f.createNewFile();
23         FileOutputStream fo=new FileOutputStream(f);
24         //fo.write(97);
25         byte[] b=new byte[]{98,99,100};
26         //fo.write(b,1,2);
27         fo.write("五一放假没事干\r\n闲来无事学Java".getBytes());
28     }
29 }

 

posted @ 2021-04-30 14:50  WakkJoker  阅读(35)  评论(0)    收藏  举报