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| 14. 8. 2. JToggleButton is a button that has two states. Pressed and not pressed. |
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import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
public class ToggleButton extends JDialog implements ActionListener {
private JToggleButton red = new JToggleButton("red");
private JToggleButton green = new JToggleButton("green");
private JToggleButton blue = new JToggleButton("blue");
private JPanel display = new JPanel();
public ToggleButton() {
JPanel bottom = new JPanel();
JPanel leftPanel = new JPanel();
red.addActionListener(this);
green.addActionListener(this);
blue.addActionListener(this);
leftPanel.add(red);
leftPanel.add(green);
leftPanel.add(blue);
bottom.add(leftPanel);
display.setBackground(Color.black);
bottom.add(display);
add(bottom);
pack();
setResizable(false);
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
setVisible(true);
}
public static void main(String[] args) {
new ToggleButton();
}
public void actionPerformed(ActionEvent e) {
Color color = display.getBackground();
int red = color.getRed();
int green = color.getGreen();
int blue = color.getBlue();
if (e.getActionCommand() == "red") {
if (red == 0) {
red = 255;
} else {
red = 0;
}
}
if (e.getActionCommand() == "green") {
if (green == 0) {
green = 255;
} else {
green = 0;
}
}
if (e.getActionCommand() == "blue") {
if (blue == 0) {
blue = 255;
} else {
blue = 0;
}
}
Color setCol = new Color(red, green, blue);
display.setBackground(setCol);
}
}
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