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Here is your resolved Program. James May i Know you are using which editor???
import javax.swing.*; import java.awt.*; import java.awt.event.*; public class trafficlights extends JFrame { private JButton redB,yellowB,greenB; private JButton stopB,lookB,goB; private StopButtonHandler sHandler; private LookButtonHandler lHandler; private GoButtonHandler gHandler; private Container pane; private static final int WIDTH = 456; private static final int HEIGHT = 100; public trafficlights() { redB = new JButton("Red"); yellowB = new JButton("Yellow "); greenB = new JButton("Green "); redB.setForeground(Color.white); yellowB.setForeground(Color.white); greenB.setForeground(Color.white); stopB = new JButton("Stop"); sHandler = new StopButtonHandler(); stopB.addActionListener(sHandler); lookB = new JButton("Look"); lHandler = new LookButtonHandler(); lookB.addActionListener(lHandler); goB = new JButton("Go"); gHandler = new GoButtonHandler(); goB.addActionListener(gHandler); Container pane = getContentPane(); pane.setLayout(new GridLayout (2, 3)); pane.add(redB); pane.add(yellowB); pane.add(greenB); pane.add(stopB); pane.add(lookB); pane.add(goB); setSize(WIDTH, HEIGHT); setVisible(true); setDefaultCloseOperation(EXIT_ON_CLOSE); } private class StopButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { redB.setForeground(Color.red); yellowB.setForeground(Color.white); greenB.setForeground(Color.white); } } private class LookButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { yellowB.setForeground(Color.yellow); redB.setForeground(Color.white); greenB.setForeground(Color.white); } } private class GoButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { greenB.setForeground(Color.green); redB.setForeground(Color.white); yellowB.setForeground(Color.white); } } public static void main(String [] args) { trafficlights demoObject = new trafficlights(); } } |
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