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JComboBox

ComboBox

ComboBox is a drop down list from where user can select one or more items. JComboBox class is used to create object of ComboBox. To populate JComboBox object array of String is passed. Event on JComboxBox object is handled by object of ActionListener interface; actionPerformed method of this interface is defined to handled event on the jcombobox object. 

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;  
public class uiExample implements ActionListener{    
JFrame f;    
JComboBox cb;
JRadioButton rb ;
JLabel jlselected;
JButton btn;
public uiExample(){    
    f=new JFrame("ComboBox Example");    
    String movies[]={"Scareface","Heat","Carlito's Way","Doggie day Afternoon","Serpico","God Father-II","Johny and Frankie"};        
    cb=new JComboBox(movies);    
    cb.setBounds(50, 50,150,30);   
	rb = new JRadioButton("IMS");
	rb.setBounds(210,100,200,200);
	btn = new JButton("Submit!!!");
	btn.setBounds(10,100,200,200);
	f.add(btn);
	f.add(rb);
    jlselected = new JLabel("Selected Movie");
    jlselected.setBounds(210,50,200,30);
    f.add(cb);  
    f.add(jlselected);      
    f.setLayout(null);    
    f.setSize(450,400);    
    f.setVisible(true); 
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    cb.setMaximumRowCount(2);
    cb.setEditable(true);
    //cb.setSelectedIndex(3);   
    //System.out.println("Selected Index: "+cb.getSelectedItem());
    btn.addActionListener(this);
}
public void actionPerformed(ActionEvent ae){
    String str = "";
	str += "Selected: "+cb.getSelectedItem()+", "+cb.getSelectedIndex();
	if(rb.isSelected()) str += " " +rb.getText();
	jlselected.setText(""+str);
}
public static void main(String[] args) {    
    new uiExample();         
}    
}