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JAVA JComboBox

This example shows how to make JComboBox look like a menu. This example has 4 java files: ComboBoxMenuExample.java, ComboMenuBar.java, ArrowIcon.java and BlankIcon.java




import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.plaf.metal.*;
import javax.swing.plaf.basic.*;

 

/**
* @version 1.0 05/10/99
*/
public class ComboBoxMenuExample extends JFrame {

public ComboBoxMenuExample() {
super("ComboBoxMenu Example");

String[] itemStr = {
"name" ,"Red" ,"Blue",
"number" ,"255,0,0" ,"0,0,255",
// separator
"system" ,"control" ,"controlHighlight" ,"controlShadow",
"text"
};

JMenuItem[] menuItems = new JMenuItem[7];
menuItems[0] = new JMenuItem(itemStr[ 1]);
menuItems[1] = new JMenuItem(itemStr[ 2]);
menuItems[2] = new JMenuItem(itemStr[ 4]);
menuItems[3] = new JMenuItem(itemStr[ 5]);
menuItems[4] = new JMenuItem(itemStr[ 8]);
menuItems[5] = new JMenuItem(itemStr[ 9]);
menuItems[6] = new JMenuItem(itemStr[10]);

JMenu[] menus = new JMenu[4];
menus[0] = new JMenu(itemStr[0]);
menus[1] = new JMenu(itemStr[3]);
menus[2] = new JMenu(itemStr[6]);
menus[3] = new JMenu(itemStr[7]);

menus[0].add(menuItems[0]);
menus[0].add(menuItems[1]);
menus[1].add(menuItems[2]);
menus[1].add(menuItems[3]);
menus[3].add(menuItems[4]);
menus[3].add(menuItems[5]);
menus[2].add(menus[3]);
menus[2].add(menuItems[6]);

JMenu menu = ComboMenuBar.createMenu(menuItems[0].getText());
menu.add(menus[0]);
menu.add(menus[1]);
menu.addSeparator();
menu.add(menus[2]);

ComboMenuBar comboMenu = new ComboMenuBar(menu);


JComboBox combo = new JComboBox();
combo.addItem(itemStr[ 1]);
combo.addItem(itemStr[ 2]);
combo.addItem(itemStr[ 4]);
combo.addItem(itemStr[ 5]);
combo.addItem(itemStr[ 8]);
combo.addItem(itemStr[ 9]);
combo.addItem(itemStr[10]);

getContentPane().setLayout(new FlowLayout());
getContentPane().add(new ComboPanel("ComboBox Menu", comboMenu));
getContentPane().add(new ComboPanel("ComboBox" , combo));
}

class ComboPanel extends JPanel {
ComboPanel(String title, JComponent c) {
setLayout(new FlowLayout());
setBorder(new TitledBorder(title));
add(c);
}
}

public static void main (String args[]) {
ComboBoxMenuExample frame = new ComboBoxMenuExample();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.setSize(370, 100);
frame.setVisible(true);
}
}

 


 

 


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Best books about JAVA programming from Amazon
Professional Java, JDK 5 Edition (Paperback Simply Java Programming: An Application-Driven Tutorial Approach (Paperback) Effective Java Programming Language Guide (Paperback) Head First Java, 2nd Edition (Paperback) Java : An Introduction to Problem Solving and Programming (4th Edition)

 

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