Java tutorial
import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JProgressBar; public class Main extends JFrame { JProgressBar bar = new JProgressBar(); JButton step = new JButton("Step"); public Main() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); step.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int value = bar.getValue() + 7; if (value > bar.getMaximum()) { value = bar.getMaximum(); } bar.setValue(value); } }); getContentPane().add(bar, BorderLayout.NORTH); getContentPane().add(step, BorderLayout.EAST); pack(); setVisible(true); } public static void main(String arg[]) { new Main(); } }