progressmonitorexp.java

Java课堂练习

/**
 * @(#)ProgressMonitorExp.java
 *
 *
 * @author 
 * @version 1.00 2007/11/19
 */
import javax.swing.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;


public class ProgressMonitorExp {
        
    /**
     * Creates a new instance of <code>ProgressMonitorExp</code>.
     */
    public ProgressMonitorExp() {
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
     byte b[]=new byte[30];
     JTextArea  text=new JTextArea(20,20);
     JFrame  frm=new JFrame();
     frm.setSize(300,300);
     frm.setVisible(true);
     frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     frm.add(new JScrollPane(text),BorderLayout.CENTER);
     frm.validate();
     try {
      FileInputStream  input=new FileInputStream("4.txt");
      ProgressMonitorInputStream input_progress=new ProgressMonitorInputStream(null,"读取java文件",input);
      ProgressMonitor p=input_progress.getProgressMonitor();
      while (input_progress.read(b)!=-1) {
      	String s=new String(b);
      	text.append(s);
      	Thread.sleep(200);      
      }
     }
     catch (Exception e) { }     
    }
}