Thread: Roll Dice Program Button

Guys How to disabled button "STOP" and When you click a button"ROLL" now the button "Roll" are disabled and "STOP" are enabled.. Who knows ?

sorry for my grammar.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
	public class LabEx4 extends JFrame{
 
	private boolean stop = false;
	private JLabel rollgame, rid1, rid2, rid3, rid4, rid5, rid6, led1, led2, led3, led4, led5, led6;
	private JButton Roll, Stop;
	private StartButtonHandler startB;
	private StopButtonHandler stopB;
	private int pict = 1;
 
 
	public void Runner(){
	rollgame = new JLabel("Rolling Dice for Games");
	rollgame.setFont(new Font("Grease", Font.BOLD, 40));
 
	ImageIcon rd1 = new ImageIcon(
	getClass().getResource("Dice1.jpg"));
	rid1 = new JLabel(rd1);
	rid1.setVisible(true);
 
	ImageIcon rd2 = new ImageIcon(
	getClass().getResource("Dice2.jpg"));
	rid2 = new JLabel(rd2);
	rid2.setVisible(false);
 
	ImageIcon rd3 = new ImageIcon(
	getClass().getResource("Dice3.jpg"));
	rid3 = new JLabel(rd3);
	rid3.setVisible(false);
 
	ImageIcon rd4 = new ImageIcon(
	getClass().getResource("Dice4.jpg"));
	rid4 = new JLabel(rd4);
	rid4.setVisible(false);
 
	ImageIcon rd5 = new ImageIcon(
	getClass().getResource("Dice5.jpg"));
	rid5 = new JLabel(rd5);
	rid5.setVisible(false);
 
	ImageIcon rd6 = new ImageIcon(
	getClass().getResource("Dice6.jpg"));
	rid6 = new JLabel(rd6);
	rid6.setVisible(false);
 
	ImageIcon ld1 = new ImageIcon(
	getClass().getResource("Dice1.jpg"));
	led1 = new JLabel(ld1);
	led1.setVisible(true);
 
	ImageIcon ld2 = new ImageIcon(
	getClass().getResource("Dice2.jpg"));
	led2 = new JLabel(ld2);
	led2.setVisible(false);
 
	ImageIcon ld3 = new ImageIcon(
	getClass().getResource("Dice3.jpg"));
	led3 = new JLabel(ld3);
	led3.setVisible(false);
 
	ImageIcon ld4 = new ImageIcon(
	getClass().getResource("Dice4.jpg"));
	led4 = new JLabel(ld4);
	led4.setVisible(false);
 
	ImageIcon ld5 = new ImageIcon(
	getClass().getResource("Dice5.jpg"));
	led5 = new JLabel(ld5);
	led5.setVisible(false);
 
	ImageIcon ld6 = new ImageIcon(
	getClass().getResource("Dice6.jpg"));
	led6 = new JLabel(ld6);
	led6.setVisible(false);
 
	Container pane = getContentPane();
	pane.setLayout(new FlowLayout(FlowLayout.CENTER, 10,10));
	pane.setBackground(Color.WHITE);
 
	pane.add(rollgame);
	pane.add(rid1);
	pane.add(rid2);
	pane.add(rid3);
	pane.add(rid4);
	pane.add(rid5);
	pane.add(rid6);
	pane.add(led1);
	pane.add(led2);
	pane.add(led3);
	pane.add(led4);
	pane.add(led5);
	pane.add(led6);
 
	JButton Roll = new JButton("ROLL");
	Roll.setFont(new Font("Georgia", Font.BOLD, 20));
	Roll.setPreferredSize(new Dimension(200,60));
	startB = new StartButtonHandler();
	Roll.addActionListener(startB);
 
	JButton Stop = new JButton("STOP");
	Stop.setFont(new Font("Georgia", Font.BOLD, 20));
	Stop.setPreferredSize(new Dimension(200,60));
	stopB = new StopButtonHandler();
	Stop.addActionListener(stopB);
 
	JPanel pan = new JPanel();
	pan.setLayout(new FlowLayout(FlowLayout.CENTER, 45,40));
	pan.setBackground(Color.WHITE);
	pan.add(Roll);
	pane.add(pan, BorderLayout.CENTER);
	pan.add(Stop);
 
	setDefaultCloseOperation(EXIT_ON_CLOSE);
	setTitle("Two Roll Dice");
	setSize(600, 500);
	setLocation(180,50);
	setResizable(false);
	setVisible(true);
 
	}
		private class StartButtonHandler implements ActionListener{
		public void actionPerformed(ActionEvent ev){
		stop = false;
 
		Thread to = new Thread(){
		public void run(){
			while(!stop){
				try{
					if(pict == 1){
					rid1.setVisible(true);
					rid2.setVisible(false);
					rid3.setVisible(false);
					rid4.setVisible(false);
					rid5.setVisible(false);
					rid6.setVisible(false);
					led1.setVisible(false);
					led2.setVisible(false);
					led3.setVisible(false);
					led4.setVisible(false);
					led5.setVisible(false);
					led6.setVisible(true);
					pict++;
					sleep(200);
					}
 
					else if(pict == 2){
					rid1.setVisible(false);
					rid2.setVisible(true);
					rid3.setVisible(false);
					rid4.setVisible(false);
					rid5.setVisible(false);
					rid6.setVisible(false);
					led1.setVisible(false);
					led2.setVisible(false);
					led3.setVisible(false);
					led4.setVisible(false);
					led5.setVisible(true);
					led6.setVisible(false);
					pict++;
					sleep(200);
 
					}
					else if(pict == 3){
					rid1.setVisible(false);
					rid2.setVisible(false);
					rid3.setVisible(true);
					rid4.setVisible(false);
					rid5.setVisible(false);
					rid6.setVisible(false);
					led1.setVisible(false);
					led2.setVisible(false);
					led3.setVisible(false);
					led4.setVisible(true);
					led5.setVisible(false);
					led6.setVisible(false);
					pict++;
					sleep(200);
					}
 
					else if(pict == 4){
					rid1.setVisible(false);
					rid2.setVisible(false);
					rid3.setVisible(false);
					rid4.setVisible(false);
					rid5.setVisible(true);
					rid6.setVisible(false);
					led1.setVisible(false);
					led2.setVisible(false);
					led3.setVisible(true);
					led4.setVisible(false);
					led5.setVisible(false);
					led6.setVisible(false);
					pict++;
					sleep(200);
					}
 
					else if(pict == 5){
					rid1.setVisible(false);
					rid2.setVisible(false);
					rid3.setVisible(false);
					rid4.setVisible(false);
					rid5.setVisible(true);
					rid6.setVisible(false);
					led1.setVisible(false);
					led2.setVisible(false);
					led3.setVisible(false);
					led4.setVisible(false);
					led5.setVisible(true);
					led6.setVisible(false);
					pict++;
					sleep(200);
					}
 
					else{
					rid1.setVisible(false);
					rid2.setVisible(false);
					rid3.setVisible(false);
					rid4.setVisible(false);
					rid5.setVisible(false);
					rid6.setVisible(true);
					led1.setVisible(false);
					led2.setVisible(false);
					led3.setVisible(false);
					led4.setVisible(false);
					led5.setVisible(false);
					led6.setVisible(true);
					pict=1;
					sleep(200);
				}
			}
				catch(InterruptedException e){
					System.out.println(e);
					}
				}
			}
		};
		to.start();
		}
	}
 
	private class StopButtonHandler implements ActionListener{
		public void actionPerformed(ActionEvent ev){
			stop = true;
		}
	}
}

Main class

public class MainEx4 {
 
   public static void main(String [] args){
 
	javax.swing.SwingUtilities.invokeLater(new Runnable() {
		public void run() {
			new LabEx4().Runner();
			}
		});
	}
}