10例子18.txt

这是一本java基础教程 对新手上路有很大帮助

import javax.swing.*; 
import java.io.*;
import java.awt.*;
import java.awt.event.*;
public class Example10_18{
    public static void main(String args[]){
       byte b[]=new byte[30];
       JTextArea text=new JTextArea(20,20);
       JFrame f=new JFrame();
       f.setSize(330,300);
       f.setVisible(true);
       f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       f.add(text,BorderLayout.CENTER);
       try{   FileInputStream input=new FileInputStream("Example10_1.java");
             ProgressMonitorInputStream in=
             new ProgressMonitorInputStream(f,"读取java文件",input);
             ProgressMonitor p=in.getProgressMonitor();   //获得进度条
             while(in.read(b)!=-1){
                String s=new String(b);
                text.append(s);
                Thread.sleep(1000);  //由于文件较小，为了看清进度条，这里有意延缓1秒
             }
       }
       catch(InterruptedException e){}
       catch(IOException e){}
    }
}