Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Dimension;
import java.awt.FlowLayout;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Main {

    public static void main(String[] args) {
        Object[] items = new Object[] { "Dog", "Cat", "Other" };
        DefaultComboBoxModel dcbm = new DefaultComboBoxModel(items);
        JComboBox comboBox = new JComboBox(dcbm);
        comboBox.setPreferredSize(new Dimension(200, 20));
        comboBox.addItemListener(e -> {
            Object selectedItem = comboBox.getSelectedItem();
            boolean editable = selectedItem instanceof String && ((String) selectedItem).equals("Other");
            comboBox.setEditable(editable);
        });
        comboBox.getEditor().addActionListener(e -> {
            Object newItem = comboBox.getEditor().getItem();
            DefaultComboBoxModel d = (DefaultComboBoxModel) comboBox.getModel();
            d.addElement(newItem);
            d.setSelectedItem(newItem);

        });

        JPanel content = new JPanel(new FlowLayout());
        content.add(new JLabel("Test:"));
        content.add(comboBox);

        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(content);
        frame.pack();
        frame.setVisible(true);
    }
}