Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.BorderLayout;
import java.awt.ItemSelectable;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

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

public class Main {

    public static void main(final String args[]) {
        final String labels[] = { "A", "B", "C", "D", "E" };
        JFrame frame = new JFrame("Selecting JComboBox");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JComboBox comboBox = new JComboBox(labels);
        frame.add(comboBox, BorderLayout.SOUTH);

        ActionListener actionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                System.out.println("Command: " + actionEvent.getActionCommand());
                ItemSelectable is = (ItemSelectable) actionEvent.getSource();
                System.out.println(", Selected: " + selectedString(is));
            }
        };
        comboBox.addActionListener(actionListener);
        comboBox.removeActionListener(actionListener);
        frame.setSize(400, 200);
        frame.setVisible(true);

    }

    static private String selectedString(ItemSelectable is) {
        Object selected[] = is.getSelectedObjects();
        return ((selected.length == 0) ? "null" : (String) selected[0]);
    }
}