Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

import javax.swing.AbstractAction;
import javax.swing.DefaultListModel;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.KeyStroke;

public class Main extends JFrame {
    JComboBox<String> comboBox;
    DefaultListModel<String> model;

    Main() {
        comboBox = new JComboBox<>(new String[] { "111", "222", "333" });
        JList<String> list = new JList<>(model = new DefaultListModel<>());
        add(comboBox, BorderLayout.SOUTH);
        add(new JScrollPane(list));

        addKeyBindings((JComponent) getContentPane());
        addKeyBindings(comboBox);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }

    private void addKeyBindings(JComponent c) {
        c.getInputMap(JComboBox.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke("ENTER"),
                "doSomething");
        c.getActionMap().put("doSomething", new AbstractAction() {

            @Override
            public void actionPerformed(ActionEvent e) {
                Object selectedItem = comboBox.getSelectedItem();
                if (selectedItem != null) {
                    model.addElement((String) selectedItem);
                }
            }
        });
    }

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

}