outputstreamtest.java

java I/0流的代码程序

import java.io.*;
import java.awt.*;
import java.awt.event.*;

public class OutputStreamTest
{
    static Frame f=new Frame("测试输入流");
    public static void main(String[] args)
    {
        int b;
        TextArea text=new TextArea(30,60);
        byte butter[]=new byte[2500];
        f.setSize(100,100);
        f.setVisible(true);
        f.add(text);
        f.pack();
        f.addWindowListener(new WindowAdapter()
                               {
                                  public void windowClosing(WindowEvent e)
                                  {f.setVisible(false);System.exit(0);}
                               }
                            );
        try
        {
            File file=new File("OutputStreamTest.java");
            FileInputStream readfile=new FileInputStream(file);
            while((b=readfile.read(butter,0,2500))!=-1)
            {
              String str=new String(butter,0,2500);
              System.out.println(str);
              text.append(str+'\n');
            }
            readfile.close();
        }
        catch(IOException e)
        {System.out.println("File read error");}


    }
}