How to Insert an item at the beginning of a JList Model

How to Insert an item at the beginning of a JList Model

Its pretty easy to insert an item at the beginning of a JList Model. Open your IDE and run below code.

Code to Insert an item at the beginning of a JList Model

[

import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import java.awt.event.MouseListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JOptionPane;

import javax.swing.JScrollPane;
public class JavaJListExample extends JFrame   {
    public JList list;
    public JButton b;

    JavaJListExample()
    {
        super("JList");
        DefaultListModel model=new DefaultListModel();
        model.addElement("WaterMelon");
        model.addElement("Orange");
        model.addElement("Pinenaple");
        model.addElement("Apple");
        model.addElement("Bananana");


        list=new JList(model);

        list.setVisibleRowCount(3);

        JScrollPane pane=new JScrollPane(list);
        pane.setBounds(50, 20, 100, 100);
        add(pane);
        list.addMouseListener(new MouseAdapter()
        {
            public void mouseClicked(MouseEvent evt)
            {
                list=(JList)evt.getSource();
                if(evt.getClickCount()>=1)
                {
                    int position =0;
                    String s=JOptionPane.showInputDialog(null, "Enter Favourite fruit", 
                            "",JOptionPane.INFORMATION_MESSAGE);
                    model.add(position,s);
                }
            }
        });

        setSize(500,200);
        setLayout(null);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
    }

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

    }

}

]

Code Explanation

Code that inserts item at the beginning of JList is [list.addMouseListener(new MouseAdapter()

        {
            public void mouseClicked(MouseEvent evt)
            {
                list=(JList)evt.getSource();
                if(evt.getClickCount()>=1)
                {
                    int position =0;
                    String s=JOptionPane.showInputDialog(null, "Enter Favourite fruit", 
                            "",JOptionPane.INFORMATION_MESSAGE);
                    model.add(position,s);
                }
            }

        });
]
[JOptionPane.showInputDialog()]-returns the string to be added to JList model.