1 import java.io.*;
2
3 public class delet {
4 public static void main(String[]args){
5 String str = "212313撒旦 大是";
6 File file = new File("data.txt");
7 if(file.exists()){
8 try {
9 file.createNewFile();
10 } catch (IOException e) {
11 e.printStackTrace();
12 }
13
14 }else{
15 System.out.println("fill");
16 }
17 try{
18 FileWriter writer = new FileWriter(file,true);
19 writer.write(str);
20 writer.close();
21 } catch (Exception e) {
22 e.printStackTrace();
23 }
24 try{
25 FileReader reader = null;
26 try {
27 reader = new FileReader(file);
28 char a[] = new char[1024];
29 int length = reader.read(a);
30 System.out.println(new String(a,0,length));
31 reader.close();
32 } catch (IOException e) {
33 e.printStackTrace();
34 }
35
36
37 }
38 }
39 }
