🚀 go-pugleaf

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import java.io.*;
public class FileIO{
  public static void main(String args[]){
    try{
      FileInputStream fin=new FileInputStream(FileDescriptor.in);
      FileOutputStream fout=new FileOutputStream(new File("KeyIn"));
      System.out.println(fin+" available"+fin.available());
      System.out.println("Key in 5 chars(end with a return)...");
      int data;
      for(int i=0; i<5; i++){
        data=fin.read();
        fout.write(data);
        System.out.println(fin+" available"+fin.available());
      }
      fout.close();

      fin=new FileInputStream(new File("KeyIn"));
      fout=new FileOutputStream(FileDescriptor.out);
      while(fin.available()>0){
        data=fin.read();
        fout.write(data);
      }
      fout.write('\n');
      fin.close();
      fout.close();
    }catch(FileNotFoundException e){
      System.out.println("error "+e);
    }catch(IOException e){
      System.out.println("error "+e);
    }
  }
}

***********************************************************
�����ϵĽ��
***********************************************************
java.io.FileInputStream@xxxxxxxx available 0
Key in 5 chars(end with a return)...
12345    <--����
java.io.FileInputStream@xxxxxxxx available 5
java.io.FileInputStream@xxxxxxxx available 4
java.io.FileInputStream@xxxxxxxx available 3
java.io.FileInputStream@xxxxxxxx available 2
java.io.FileInputStream@xxxxxxxx available 1
12345


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