Mega Code Archive
A progress bar is used for lengthy tasks
<![CDATA[
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JProgressBar;
import javax.swing.Timer;
public class ProgressBar {
public static void main(String[] args) {
final Timer timer;
final JProgressBar progressBar = new JProgressBar();
final JButton button = new JButton("Start");
JFrame f = new JFrame();
f.setLayout(new FlowLayout());
f.add(progressBar);
f.add(button);
ActionListener updateProBar = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
int val = progressBar.getValue();
if (val >= 100) {
// timer.stop();
button.setText("End");
return;
}
progressBar.setValue(++val);
}
};
timer = new Timer(50, updateProBar);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (timer.isRunning()) {
timer.stop();
button.setText("Start");
} else if (button.getText() != "End") {
timer.start();
button.setText("Stop");
}
}
});
f.pack();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setResizable(false);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
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