import java.awt.Font; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; public class Main { public static int time=0; public static JLabel text; public static boolean w; public static void main(String[] args) { // TODO Auto-generated method stub JFrame frame=new JFrame(); frame.setBounds(300,200,200,400); JPanel mainPanel=new JPanel(); frame.add(mainPanel); mainPanel.setLayout(new GridLayout(2,1)); text=new JLabel("0"); text.setFont(new Font("",0,40)); mainPanel.add(text); JPanel buttons=new JPanel(); mainPanel.add(buttons); buttons.setLayout(new GridLayout(1,2)); JButton start=new JButton("Start"); buttons.add(start); JButton stop=new JButton("Stop"); buttons.add(stop); start.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent arg0) { // TODO Auto-generated method stub Second s=new Second(); w=true; s.start(); start.setEnabled(false); }}); stop.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent arg0) { // TODO Auto-generated method stub w=false; start.setEnabled(true); }}); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }