How to removeAllItems from JComboBox.

How to removeAllItems from JComboBox.

It's pretty easy to removeItems from JComboBox once you have added them using JComboBox:addItems methods.

Removing all JComboBox Items

[

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JComboBox;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JOptionPane;
import javax.swing.UIManager;


public class JComboBoxRemoveItems extends JFrame implements ActionListener{
    public JButton b;
    public JComboBox box;

    public JComboBoxRemoveItems()
    {
        super("Remove JComboBox Items");
        String names []={"Eric","Mutua","James","Bill","Obama"};

        try{UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
        }
        catch(Exception e){}

        box=new JComboBox(names);

        box.setBounds(50,50,150,30);
        add(box);
        b=new JButton("Remove");
        b.setBounds(50, 100, 150, 30);
        add(b);
        b.addActionListener(this);

        setSize(400,400);
        setLayout(null);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);

    }
    public void actionPerformed(ActionEvent event)
    {
        box.removeAllItems();

        JOptionPane.showMessageDialog(this,"All items removed ",
                "Removing Item from JcomboBox",JOptionPane.INFORMATION_MESSAGE);

    }
    public static void main(String args[])
    {
        new  JComboBoxRemoveItems();

    }

}

]

See also:

• JComboBox:addItem(Object o)

• JComboBox:addItemListener

• JComboBox:removeItem