IO流

Posted 2022-01-15 bnvf

 1 package Suchas;
 2  import java.io.*;
 3 
 4 public class FileIO 
 5 
 6     public FileIO(String str)
 7      
 8          File f = new File("data.txt");
 9          try 
10          
11              File file = new File("data.txt");
12              FileWriter fw = new FileWriter(file);
13              BufferedWriter bw = new BufferedWriter(fw);
14             bw.write(str);
15              bw.close();
16           catch (IOException e)
17          
18             e.printStackTrace();
19         
20     
21     public static void main(String[] args) 
22     
23          String str = "[email protected]#%&*软件工程";
24          new File(str);
25  
26      
27  
28  

 1 package Suchas;
 2  import java.io.BufferedReader;
 3  import java.io.File;
 4  import java.io.FileNotFoundException;
 5  import java.io.FileReader;
 6  import java.io.IOException;
 7  public class Filedemo
 8  
 9      public Filedemo()
10      
11          File f = new File("data.txt");
12              try 
13                  BufferedReader br = new BufferedReader(new FileReader(f));
14                 String str = br.readLine();
15                  System.out.println(str);
16                  br.close();
17              catch (FileNotFoundException e) 
18              
19                  e.printStackTrace();
20               catch (IOException e) 
21              
22                  e.printStackTrace();
23                  
24      
25      public static void main(String[] args) 
26      
27          new Filedemo();
28  
29      
30  
31