🚀 go-pugleaf

I write a program to get a pictrue in a web server,after the picture was changed,I found my program can not get the new pictrue if i do not restart my program.
I used JDK 1.4.1_02.
Can you help me?
Following is my code:

package test;

import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.io.*;
import java.net.*;

public class Frame1 extends JFrame
{
    Image imageLogo = null;
    String strWelcomeInfo = "";
    String strHomePage = "";

    JPanel contentPane;
    BorderLayout borderLayout1 = new BorderLayout();
    JPanel jPanel1 = new JPanel();
    JPanel jPanel2 = new JPanel();
    JButton jButton1 = new JButton();
    JButton jButton2 = new JButton();
    JLabel lblLogo = new JLabel();
    JButton jButton3 = new JButton();

    //Construct the frame
    public Frame1()
    {
        enableEvents(AWTEvent.WINDOW_EVENT_MASK);
        try
        {
            jbInit();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    //Component initialization
    private void jbInit()
        throws Exception
    {
        contentPane = (JPanel)this.getContentPane();
        contentPane.setLayout(borderLayout1);
        this.setSize(new Dimension(400, 300));
        this.setTitle("Frame Title");
        jButton1.setText("close");
        jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));
        jButton2.setText("Refresh");
        jButton2.addActionListener(new Frame1_jButton2_actionAdapter(this));
        jButton3.setText("clear");
    jButton3.addActionListener(new Frame1_jButton3_actionAdapter(this));
    contentPane.add(jPanel1, BorderLayout.CENTER);
        jPanel1.add(lblLogo, null);
        contentPane.add(jPanel2, BorderLayout.SOUTH);
        jPanel2.add(jButton3, null);
    jPanel2.add(jButton2, null);
        jPanel2.add(jButton1, null);
    }

    //Overridden so we can exit when window is closed
    protected void processWindowEvent(WindowEvent e)
    {
        super.processWindowEvent(e);
        if (e.getID() == WindowEvent.WINDOW_CLOSING)
        {
            System.exit(0);
        }
    }

    void jButton1_actionPerformed(ActionEvent e)
    {
        System.exit(0);
    }

    void jButton2_actionPerformed(ActionEvent e)
    {
        try
        {
            URL url = new URL("http://127.0.0.1/image/logo.gif");
            this.imageLogo = Toolkit.getDefaultToolkit().getImage(url);
            this.lblLogo.setIcon(new ImageIcon(this.imageLogo));
            Toolkit.getDefaultToolkit().sync();
        }
        catch (Exception ex)
        {
            System.out.println("error : " + ex);
        }
    }

    void jButton3_actionPerformed(ActionEvent e)
    {
        this.lblLogo.setIcon(null);
    }
    public static void main(String[] args)
    {
        try
        {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        (new Frame1()).show();
    }

}

class Frame1_jButton1_actionAdapter implements java.awt.event.ActionListener
{
    Frame1 adaptee;

    Frame1_jButton1_actionAdapter(Frame1 adaptee)
    {
        this.adaptee = adaptee;
    }

    public void actionPerformed(ActionEvent e)
    {
        adaptee.jButton1_actionPerformed(e);
    }
}

class Frame1_jButton2_actionAdapter implements java.awt.event.ActionListener
{
    Frame1 adaptee;

    Frame1_jButton2_actionAdapter(Frame1 adaptee)
    {
        this.adaptee = adaptee;
    }

    public void actionPerformed(ActionEvent e)
    {
        adaptee.jButton2_actionPerformed(e);
    }
}

class Frame1_jButton3_actionAdapter implements java.awt.event.ActionListener
{
    Frame1 adaptee;

    Frame1_jButton3_actionAdapter(Frame1 adaptee)
    {
    this.adaptee = adaptee;
    }
    public void actionPerformed(ActionEvent e)
    {
    adaptee.jButton3_actionPerformed(e);
    }
}