test/jdk/java/awt/Label/NullLabelTest.java

/*
 * Copyright (c) 2005, 2023, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
  @test
  @bug 6215905
  @summary Tests that passing null value to Label.setText(String) doesn't
            lead to VM crash.
  @key headful
  @run main NullLabelTest
*/

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Label;
import java.awt.Frame;

public class NullLabelTest {

    static Frame frame;
    public static void main(String[] args) throws Exception {
        EventQueue.invokeAndWait(() -> {
            try {
                frame = new Frame();
                Label l = new Label("A");
                frame.add(l);
                frame.setLayout(new BorderLayout());
                frame.setSize(200, 200);
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
                l.setText(null);
            } finally {
                if (frame != null) {
                    frame.dispose();
                }
            }
        });
    }
}