import javax.swing.JFrame; import javax.swing.JProgressBar; import javax.swing.JButton; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; class Program extends JFrame { JProgressBar folyamatsav; JButton gomb; Program() { folyamatsav = new JProgressBar(); gomb = new JButton("Növel"); folyamatsav.setMinimum(0); folyamatsav.setMaximum(100); folyamatsav.setValue(20); folyamatsav.setBounds(50, 50, 200, 30); gomb.setBounds(100, 100, 100, 30); gomb.addActionListener(new Gomb_Click()); add(folyamatsav); add(gomb); setLayout(null); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(400, 300); setVisible(true); } class Gomb_Click implements ActionListener { public void actionPerformed(ActionEvent e) { int a = folyamatsav.getValue(); a++; folyamatsav.setValue(a); } } public static void main(String[] args) { new Program(); } }