Java/traffic light at lab-cycle · Ashil10/Java · GitHub

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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class trafflight extends JFrame implements ActionListener{
JRadioButton bg,br,by;
JTextField lg,lr,ly,text;
	trafflight()
	{	setVisible(true);
		setLayout(null);
		setSize(600,600);
		bg=new JRadioButton("Green");
		by=new JRadioButton("Yellow");
		br=new JRadioButton("Red");

		bg.setBounds(200, 50, 100, 50);
		br.setBounds(300, 50, 100, 50);
		by.setBounds(400, 50, 100, 50);
		add(bg);
		add(br);
		add(by);
		lg=new JTextField();
		lr=new JTextField();
		ly=new JTextField();
		text=new JTextField();
		lg.setBounds(300, 200, 50, 50);
		lr.setBounds(300, 300, 50, 50);
		ly.setBounds(300, 400, 50, 50);
		text.setBounds(250,150,200,50);
		add(lg);
		add(ly);
		add(lr);
		add(text);
		bg.addActionListener((ActionListener) this);
		br.addActionListener((ActionListener) this);
		by.addActionListener((ActionListener) this);
	}
public void actionPerformed(ActionEvent e)
{
	if(e.getSource()==bg)
	{
		lg.setBackground(Color.GREEN);
		ly.setBackground(null);
		lr.setBackground(null);
		text.setText("Go");
	}
	else if(e.getSource()==br)
	{
		lg.setBackground(null);
		ly.setBackground(null);
		lr.setBackground(Color.red);
		text.setText("Stop");
	}
	else if(e.getSource()==by)
	{
		lg.setBackground(null);
		ly.setBackground(Color.YELLOW);
		lr.setBackground(null);
		text.setText("Go slow");
	}
}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
new trafflight();
	}
}