MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.Frame;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.InputMap;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JRootPane;
import javax.swing.KeyStroke;

public class MainClass {

    public static void main(final String args[]) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setSize(500, 300);
        frame.setVisible(true);

        EscapeDialog esc = new EscapeDialog(frame);
        esc.setSize(200, 200);
        esc.setVisible(true);

    }
}

class EscapeDialog extends JDialog {
    public EscapeDialog(Frame owner) {
        super(owner, true);
        getContentPane().add(new JComboBox());
    }

    protected JRootPane createRootPane() {
        JRootPane rootPane = new JRootPane();
        KeyStroke stroke = KeyStroke.getKeyStroke("ESCAPE");
        Action actionListener = new AbstractAction() {
            public void actionPerformed(ActionEvent actionEvent) {
                setVisible(false);
            }
        };
        InputMap inputMap = rootPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
        inputMap.put(stroke, "ESCAPE");
        rootPane.getActionMap().put("ESCAPE", actionListener);

        return rootPane;
    }
}