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- import javax.swing.JComponent;
- import java.awt.Color;
- import java.awt.Graphics;
- import java.awt.Graphics2D;
- import java.awt.geom.Ellipse2D;
- public class TrafficLightComponent extends JComponent
- {
- public void paintComponent(Graphics g)
- {
- Graphics2D g2 = (Graphics2D) g;
- g.setColor(Color.RED);
- g.fillOval(10, 10, 40, 40);
- g.setColor(Color.YELLOW);
- g.fillOval(10, 60, 40, 40);
- g.setColor(Color.GREEN);
- g.fillOval(10, 110, 40, 40);
- }
- }
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