文件的复制

 

import java.io.*;
public class Copy {
  public static void main(String[] args) {
   int b = 0;
   FileReader in = null;
   FileWriter out = null;
   try {
     in = new FileReader("G:/test.txt");
     out = new FileWriter("G:/HW.java");
     while((b=in.read())!=-1){
       out.write(b);
     }
     out.close();
     in.close();
    
   } catch (FileNotFoundException e2) {
     System.out.println("找不到指定文件"); System.exit(-1);
   } catch (IOException e1) {
     System.out.println("文件复制错误"); System.exit(-1);
   }
   System.out.println("文件已复制");
  }
}