I have problem with the stopwatch i made. For some reason, when i press "start"
it just lags out. Can someone please check the code and tell me whats wrong?
THANK YOU SO MUCH!
Executor
package stopwatchpackage;
public class StopwatchMain {
public static void main(String[]args) {
new StopwatchMain();
}
public StopwatchMain() {
new stopwatch();
}
}Stopwatch class
/**
* ---------------------------------------------------------
* @author
* Date Created: Sunday September 19 2010*
* Last Update: Sunday September 19 2010*
*
*
*
* ---------------------------------------------------------
**/
package stopwatchpackage;
import java.awt.Event.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JTextField;
public class stopwatch extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
// JButtons
private JButton start;
private JButton stop;
private JButton reset;
// JLabel
private JTextField time;
// JPanel
private JPanel buttonPanel;
private JPanel mainpanel = new JPanel();
// boolean
private boolean isRunning = false;
// long
private long startTime;
private long stopTime;
private long Elapsed;
public stopwatch() {
//House Keeping
super("Java Stopwatch by Jeel Shah");
setSize(300,150);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainpanel.setLayout(new FlowLayout());
buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(1,3));
//Labels
time = new JTextField(5);
time.setText("0.00");
start = new JButton("Start");
stop = new JButton("Stop");
reset = new JButton("Reset");
buttonPanel.add(start);
buttonPanel.add(stop);
buttonPanel.add(reset);
time.setLocation(150, 75);
mainpanel.add(time);
mainpanel.add(buttonPanel);
add(mainpanel);
start.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
isRunning = true;
while (isRunning) {
//--- Wait 0.01 seconds, then determine passed time in hundreds of seconds
try {
Thread.sleep(10);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
long hs = (System.currentTimeMillis() - startTime) / 10;
// While running, display the passed time
time.setText( String.format( "%d:%02d.%02d", hs/6000, hs/100%60, hs%100 ));
}
}
}
);
stop.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
isRunning = false;
stopTime = System.currentTimeMillis();
Elapsed = (stopTime - startTime)/1000;
time.setText(""+Elapsed);
}
}
);
reset.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
time.setText("0.0");
}
}
);
}
}