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Java JComboBox

The object of Choice class is used to show popup menu of choices. Choice selected by user is shown on the top of a menu. It inherits JComponent class.

JComboBox class declaration

Let's see the declaration for javax.swing.JComboBox class.

public class JComboBox extends JComponent implements ItemSelectable, ListDataListener, ActionListener, Accessible

Commonly used Constructors:

Constructor	Description
JComboBox()	Creates a JComboBox with a default data model.
JComboBox(Object[] items)	Creates a JComboBox that contains the elements in the specified array.
JComboBox(Vector items)	Creates a JComboBox that contains the elements in the specified Vector.

Commonly used Methods:

Methods	Description
void addItem(Object anObject)	It is used to add an item to the item list.
void removeItem(Object anObject)	It is used to delete an item to the item list.
void removeAllItems()	It is used to remove all the items from the list.
void setEditable(boolean b)	It is used to determine whether the JComboBox is editable.
void addActionListener(ActionListener a)	It is used to add the ActionListener.
void addItemListener(ItemListener i)	It is used to add the ItemListener.

Java JComboBox Example

import javax.swing.*;  
public class ComboBoxExample {  
JFrame f;  
ComboBoxExample(){  
    f=new JFrame("ComboBox Example");  
    String country[]={"India","Aus","U.S.A","England","Newzealand"};      
    JComboBox cb=new JComboBox(country);  
    cb.setBounds(50, 50,90,20);  
    f.add(cb);      
    f.setLayout(null);  
    f.setSize(400,500);  
    f.setVisible(true);       
}  
public static void main(String[] args) {  
    new ComboBoxExample();       
}  
} 

Output:

Java JComboBox Example with ActionListener

import javax.swing.*;  
import java.awt.event.*;  
public class ComboBoxExample {  
JFrame f;  
ComboBoxExample(){  
    f=new JFrame("ComboBox Example"); 
    final JLabel label = new JLabel();        
    label.setHorizontalAlignment(JLabel.CENTER);
    label.setSize(400,100);
    JButton b=new JButton("Show");
    b.setBounds(200,100,75,20);
    String languages[]={"C","C++","C#","Java","PHP"};      
    final JComboBox cb=new JComboBox(languages);  
    cb.setBounds(50, 100,90,20);  
    f.add(cb); f.add(label); f.add(b);  
    f.setLayout(null);  
    f.setSize(350,350);  
    f.setVisible(true);     
    b.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {     
String data = "Programming language Selected: " 
   + cb.getItemAt(cb.getSelectedIndex());
label.setText(data);
}
}); 	    
}  
public static void main(String[] args) {  
    new ComboBoxExample();       
}  
}  

Output:

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Java Tutorial

Control Statements

Java Object Class

Java Inheritance

Java Polymorphism

Java Abstraction

Java Encapsulation

Java Array

Java OOPs Misc

Java String

Java String Methods

Java Regex

Exception Handling

Java Inner Class

Java Multithreading

Java Synchronization

Java I/O

Java Serialization

Java Networking

Java AWT & Events

Java Swing

Java Swing Apps

LayoutManagers

JavaFX Tutorial

JavaFX 2D Shapes

JavaFX Text

JavaFX Effects

JavaFX Transformation

JavaFX Animation

JavaFX 3D Shapes

JavaFX Layouts

JavaFX UI

JavaFX Charts

JavaFX CSS

Media with JavaFX

JavaFX Event Handling

Java Applet

Java Reflection

Java 8 Date Time

Java Date (Classical)

Java Date Format

Current Date Time

Java Conversion

Java Collections

Java JDBC

Java New Features

Java 9 Features

Java 8 Features

Java 7 Features

Java 4/5 Features

RMI

Internationalization

Java JComboBox

JComboBox class declaration

Commonly used Constructors:

Commonly used Methods:

Java JComboBox Example

Java JComboBox Example with ActionListener

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