package SwingGui.sky.com;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;public class SimpleGui implements ActionListener {JFrame frame;JLabel label;int x =70;int y = 70;public static void main(String [] args) {SimpleGui gui = new SimpleGui();gui.go();}public void go() {frame = new JFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JButton labelButton = new JButton("Change Label");labelButton.addActionListener(new LabelListener());JButton colorButton = new JButton("Change Circle");colorButton.addActionListener(new ColorListener());label = new JLabel("I'am a label");MyDrawPanel drawPanel = new MyDrawPanel();frame.getContentPane().add(drawPanel);        frame.getContentPane().add(BorderLayout.SOUTH, colorButton);frame.getContentPane().add(BorderLayout.CENTER, drawPanel);frame.getContentPane().add(BorderLayout.EAST, labelButton);frame.getContentPane().add(BorderLayout.WEST, label);frame.setSize(800, 500);frame.setVisible(true);for (int i = 0; i < 130; i++) {x++;y++;drawPanel.repaint();try {Thread.sleep(20);} catch (Exception ex) {}}}@Override public void actionPerformed(ActionEvent event) {JButton button=(JButton) event.getSource(); button.setText("I'v been clicked!..");button.setBackground(Color.blue);}class LabelListener implements ActionListener {public void actionPerformed(ActionEvent event) {label.setText("Ouch");}}class ColorListener implements ActionListener {public void actionPerformed(ActionEvent event) {frame.repaint();}}class MyDrawPanel extends JPanel {public void paintComponent(Graphics g) {g.setColor(Color.white);g.fillRect(0, 0, this.getWidth(), this.getHeight());g.setColor(Color.green);g.fillOval(x, y, 40, 40);}}
}