ComboBoxDemo.java

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class ComboBoxDemo implements ActionListener

{ 

    private JFrame frame;

	private JComboBox cb;

	private JLabel label;

		

	public ComboBoxDemo()

	{

		frame = new JFrame("A Simple Swing App");

		//frame.setSize(600, 400);

		Toolkit tk = frame.getToolkit();

		Dimension dim = tk.getScreenSize();

		int width = (int)dim.getWidth();

		int height = (int)dim.getHeight();

		frame.setSize(width, height);

		 

		frame.setLayout(new FlowLayout());	

		

		cb = new JComboBox();

		cb.addItem("Banana"); cb.addItem("Apple"); cb.addItem("Orange"); 

		cb.addItem("Grape");  cb.addItem("Mango"); cb.addItem("Pineapple");			

		

		cb.addActionListener(this);

		frame.add(cb);

		

		label = new JLabel("I show the selected item");

		label.setFont(new Font("Verdana", Font.BOLD, 18));

		label.setForeground(Color.RED);

		frame.add(label);

				

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		frame.setVisible(true);

	}

		public void actionPerformed(ActionEvent ae)

	{   label.setText((String)cb.getSelectedItem());		 

	}

	

	public static void main(String[] args)

	{   new ComboBoxDemo();

	}

}