copythreadprogress.java

一个模拟windows复制文件显示进度的java程序

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

class A
{
	public static void main(String [] args)
	{
		new ProgressFrame();
	}
}

class ProgressFrame extends JFrame 
{

	JButton btn=new JButton("ok");
	public ProgressFrame()
	{

		
		this.getContentPane().add(btn,"South");
	
		btn.addActionListener(new ActionListener()
		{
			public 	void actionPerformed(ActionEvent e)
			{
				new Thread(new Copy(new File("E:\\JDK\\kk.dsw"),new File("kk.dsw"))).start();
				//proBar.setValue(proBar.getValue()+1);
			}
		});
		
		
		
		
		
		setBounds(10,10,450,400);
		setVisible(true);
	}
	
	class Copy implements Runnable
	{
		
		File source,dest;
		FileInputStream in ;
		FileOutputStream out ;
		public Copy(File source,File dest)
		{
			this.source=source;
			this.dest=dest;

       	  try 
       	  {
       	  	in = new FileInputStream(source);
       	 	out = new FileOutputStream(dest);
			 
		  }
		  catch (Exception ex)
		  {
		  }
       	  
       	  //proBar.setMaximum((int)source.length());
       	  
		}
		public void run()
		{
			 int c=0;
			 int readed=0;
			 
			JProgressBar pBar=new JProgressBar(0,100);
			JFrame f=new JFrame();
			f.setSize(500,50);
			f.getContentPane().add(pBar);
			f.setVisible(true);
			
			try {
				
				while ((c = in.read()) != -1)
	        	{
	        			out.write(c);
	        			readed++;
	        			
	        			
	        			int s=(int)(readed*100/source.length());
	        			System.out.println (s);
	        			pBar.setValue(s);
	        			pBar.setStringPainted(true);
        			
	        	
	        	}
	          	 
	
	        	in.close();
	       		out.close();
		    }
		    catch (Exception ex) {
		    }

        	
			
		}
	}
	
}