Java - Drop Down Menu
How To Make A Drop And Down Menu In Java Eclipse
In this Java Tutorial we will see How To Make A Drop N Down Menu Using Panel Buttons And Timer In Java Using Eclipse .
Project Source Code:
package p;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.border.EmptyBorder;
import javax.swing.JButton;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class drop_down_menu extends JFrame {
private JPanel contentPane;
Timer tm1,tm2,tm3;
// the panels default height = 60
Integer pl1 = 60,pl2 = 60,pl3 = 60;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
drop_down_menu frame = new drop_down_menu();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public drop_down_menu() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 550, 435);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JPanel panel = new JPanel();
panel.setBounds(376, 11, 148, 60);
contentPane.add(panel);
panel.setLayout(null);
JButton btnNewButton = new JButton("New button");
btnNewButton.setBackground(Color.ORANGE);
btnNewButton.setBounds(0, 0, 148, 60);
panel.add(btnNewButton);
JButton button = new JButton("New button");
button.setBackground(Color.ORANGE);
button.setBounds(0, 61, 148, 60);
panel.add(button);
JButton button_1 = new JButton("New button");
button_1.setBackground(Color.ORANGE);
button_1.setBounds(0, 122, 148, 60);
panel.add(button_1);
JButton button_2 = new JButton("New button");
button_2.setBackground(Color.ORANGE);
button_2.setBounds(0, 183, 148, 60);
panel.add(button_2);
JButton button_3 = new JButton("New button");
button_3.setBackground(Color.ORANGE);
button_3.setBounds(0, 243, 148, 60);
panel.add(button_3);
JPanel panel_1 = new JPanel();
panel_1.setLayout(null);
panel_1.setBounds(211, 11, 148, 60);
contentPane.add(panel_1);
JButton button_4 = new JButton("New button");
button_4.setBackground(Color.ORANGE);
button_4.setBounds(0, 0, 148, 60);
panel_1.add(button_4);
JButton button_5 = new JButton("New button");
button_5.setBackground(Color.ORANGE);
button_5.setBounds(0, 61, 148, 60);
panel_1.add(button_5);
JButton button_6 = new JButton("New button");
button_6.setBackground(Color.ORANGE);
button_6.setBounds(0, 122, 148, 60);
panel_1.add(button_6);
JButton button_7 = new JButton("New button");
button_7.setBackground(Color.ORANGE);
button_7.setBounds(0, 183, 148, 60);
panel_1.add(button_7);
JButton button_8 = new JButton("New button");
button_8.setBackground(Color.ORANGE);
button_8.setBounds(0, 243, 148, 60);
panel_1.add(button_8);
JPanel panel_2 = new JPanel();
panel_2.setLayout(null);
panel_2.setBounds(42, 11, 148, 60);
contentPane.add(panel_2);
JButton button_9 = new JButton("New button");
button_9.setBackground(Color.ORANGE);
button_9.setBounds(0, 0, 148, 60);
panel_2.add(button_9);
JButton button_10 = new JButton("New button");
button_10.setBackground(Color.ORANGE);
button_10.setBounds(0, 61, 148, 60);
panel_2.add(button_10);
JButton button_11 = new JButton("New button");
button_11.setBackground(Color.ORANGE);
button_11.setBounds(0, 122, 148, 60);
panel_2.add(button_11);
JButton button_12 = new JButton("New button");
button_12.setBackground(Color.ORANGE);
button_12.setBounds(0, 183, 148, 60);
panel_2.add(button_12);
JButton button_13 = new JButton("New button");
button_13.setBackground(Color.ORANGE);
button_13.setBounds(0, 243, 148, 60);
panel_2.add(button_13);
tm1 = new Timer(20, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// 300 the maximum height
if(pl1 > 300)
{
tm1.stop();
}
else{
panel.setSize(panel.getWidth(),pl1);
pl1 += 20;
}
}
});
tm2 = new Timer(20, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(pl2 > 300)
{
tm2.stop();
}
else{
panel_1.setSize(panel_1.getWidth(),pl2);
pl2 += 20;
}
}
});
tm3 = new Timer(20, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(pl3 > 300)
{
tm3.stop();
}
else{
panel_2.setSize(panel_2.getWidth(),pl3);
pl3 += 20;
}
}
});
btnNewButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent arg0) {
// set the panels to the dafault height
panel_1.setSize(panel_1.getWidth(), pl2);
panel_2.setSize(panel_2.getWidth(), pl3);
tm1.start();
}
@Override
public void mouseExited(MouseEvent e) {
tm1.stop();
pl1 = 60;
}
});
button_4.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent arg0) {
panel.setSize(panel.getWidth(), pl1);
panel_2.setSize(panel_2.getWidth(), pl3);
tm2.start();
}
@Override
public void mouseExited(MouseEvent e) {
tm2.stop();
pl2 = 60;
}
});
button_9.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
panel_1.setSize(panel_1.getWidth(), pl2);
panel.setSize(panel.getWidth(), pl1);
tm3.start();
}
@Override
public void mouseExited(MouseEvent e) {
tm3.stop();
pl3 = 60;
}
});
}
}
// OUTPUT :
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