109 lines
3.8 KiB
Java
109 lines
3.8 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @key headful
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* @bug 6542439
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* @summary Verifies memory leak in BasicComboBoxUI and MetalComboBoxButton
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* @run main TestMemLeakComboBox
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*/
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import java.awt.Graphics;
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import java.awt.Component;
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import java.awt.Container;
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import java.awt.Dimension;
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import java.awt.FlowLayout;
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import javax.swing.JFrame;
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import javax.swing.JPanel;
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import javax.swing.JComboBox;
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import javax.swing.CellRendererPane;
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import javax.swing.SwingUtilities;
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import javax.swing.UIManager;
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import javax.swing.UnsupportedLookAndFeelException;
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public class TestMemLeakComboBox {
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private static JFrame frame;
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private static String failed = null;
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private static void setLookAndFeel(UIManager.LookAndFeelInfo laf) {
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try {
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UIManager.setLookAndFeel(laf.getClassName());
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} catch (UnsupportedLookAndFeelException ignored) {
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System.out.println("Unsupported L&F: " + laf.getClassName());
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} catch (ClassNotFoundException | InstantiationException
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| IllegalAccessException e) {
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throw new RuntimeException(e);
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}
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}
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private static class MyPanel extends JPanel {
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public void paint(Graphics g) {
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super.paint(g);
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for (Component child : getComponents()) {
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verifyChild(child);
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}
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}
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private void verifyChild(Component c) {
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if (c instanceof JComboBox) {
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for (Component child : ((Container)c).getComponents()) {
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if (child instanceof CellRendererPane &&
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((CellRendererPane)child).getComponentCount() > 0) {
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failed = new String("CellRendererPane still has children for: " + c);
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}
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}
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}
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}
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}
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public static void main(String[] args) throws Exception {
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for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
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System.out.println("Testing l&f : " + laf.getClassName());
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SwingUtilities.invokeAndWait(() -> setLookAndFeel(laf));
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test();
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if (failed != null) {
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throw new RuntimeException(failed);
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}
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}
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}
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private static void test() throws Exception {
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try {
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SwingUtilities.invokeAndWait(() -> {
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frame = new JFrame();
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JPanel panel = new MyPanel();
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panel.setPreferredSize(new Dimension(100, 100));
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panel.setLayout(new FlowLayout());
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panel.add(new JComboBox(new String[]{"one", "two", "three"}));
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frame.add(panel);
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frame.pack();
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frame.setVisible(true);
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});
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} finally {
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if (frame != null) {
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SwingUtilities.invokeAndWait(() -> frame.dispose());
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}
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}
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}
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}
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