50 lines
1.2 KiB
Java
50 lines
1.2 KiB
Java
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import java.awt.*;
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import javax.swing.*;
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import java.awt.event.*;
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class Observer implements ActionListener {
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public Observer() {
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}
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public void actionPerformed(ActionEvent evt) {
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String name = evt.getActionCommand();
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JPanel f = (JPanel)((JButton)evt.getSource()).getParent();
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if (name == "Jaune") {
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f.setBackground(Color.YELLOW);
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} else if (name == "Cyan") {
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f.setBackground(Color.CYAN);
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} else if (name == "Magenta") {
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f.setBackground(Color.MAGENTA);
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}
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}
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}
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public class Fond {
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public static void main(String[] args) {
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JFrame f = new JFrame("Fond");
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f.setSize(200, 200);
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f.setLocation(100, 100);
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f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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f.setLayout(new GridLayout(1, 3));
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JButton b1 = new JButton("Jaune");
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JButton b2 = new JButton("Cyan");
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JButton b3 = new JButton("Magenta");
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Observer observer = new Observer();
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b1.addActionListener(observer);
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b2.addActionListener(observer);
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b3.addActionListener(observer);
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f.add(b1);
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f.add(b2);
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f.add(b3);
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f.setVisible(true);
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}
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}
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