test/jdk/javax/swing/ComponentInputMap/4248723/bug4248723.java

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 * version 2 for more details (a copy is included in the LICENSE file that
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/*
 * @test
 * @bug 4248723
 * @summary Tests that ComponentInputMap doesn't throw NPE when deserializing
 * @run main bug4248723
 */

import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import javax.swing.ComponentInputMap;
import javax.swing.JButton;
import javax.swing.KeyStroke;

public class bug4248723 {
    public static Object serializeAndDeserialize(Object toWrite)
            throws ClassNotFoundException, IOException {
        ByteArrayOutputStream ostream = new ByteArrayOutputStream();
        ObjectOutputStream p = new ObjectOutputStream(ostream);
        p.writeObject(toWrite);
        p.flush();
        byte[] data = ostream.toByteArray();
        ostream.close();

        ByteArrayInputStream istream = new ByteArrayInputStream(data);
        ObjectInputStream q = new ObjectInputStream(istream);
        Object retValue = q.readObject();
        istream.close();
        return retValue;
    }

    public static void main(String[] argv) {
        ComponentInputMap cim = new ComponentInputMap(new JButton());
        cim.put(KeyStroke.getKeyStroke(
                KeyEvent.VK_B, InputEvent.CTRL_DOWN_MASK), "A");
        try {
            cim = (ComponentInputMap)serializeAndDeserialize(cim);
        } catch (ClassNotFoundException|IOException ignore) {
            // Should not cause test to fail so silently ignore these
        }
    }
}