io流文件输入输出’

 package syj;
2 import java.io.*;
3 public class syj4 {
4     public static void main(String[] args) {
5         // TODO 自动生成的方法存根
6          File file = new File("data.txt");
7          String syj = "12345abcdef@#%&*软件工程 ";
8          try {
9              FileWriter t = new FileWriter (file);
10              BufferedWriter out = new BufferedWriter (t);
11              out.write(syj);
12              out.close();
13              t.close();         
14              } catch (Exception e) {
15                 e.printStackTrace();
16             }
17          try {
18              FileReader fr = new FileReader(file);
19              BufferedReader in = new BufferedReader(fr);
20              String ss = in.readLine();
21              System.out.println("文件中的信息是："+ ss);
22              in.close();
23              fr.close();
24              }catch (Exception e) {
25                 e.printStackTrace();
26             }
27         }
28 }