openjdk源码
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/*
* Copyright (c) 2013, 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.
*/
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.List;
import java.awt.peer.ListPeer;
/**
* @test
* @bug 7090424
* @author Sergey Bylokhov
*/
public final class ListRepaint extends List {
public static void main(final String[] args) {
for (int i = 0; i < 10; ++i) {
final Frame frame = new Frame();
frame.setSize(300, 300);
frame.setLocationRelativeTo(null);
ListRepaint list = new ListRepaint();
list.add("1");
list.add("2");
list.add("3");
list.add("4");
list.select(0);
frame.add(list);
frame.setVisible(true);
sleep();
list.test();
frame.dispose();
}
}
private static void sleep() {
try {
Thread.sleep(2000);
} catch (InterruptedException ignored) {
}
}
@Override
public void paint(final Graphics g) {
super.paint(g);
if (!EventQueue.isDispatchThread()) {
throw new RuntimeException("Wrong thread");
}
test();
}
void test() {
select(0);
((ListPeer) getPeer()).select(getSelectedIndex());
setFont(null);
setFont(getFont());
getPeer().setFont(getFont());
setBackground(null);
setBackground(getBackground());
getPeer().setBackground(getBackground());
setForeground(null);
setForeground(getForeground());
getPeer().setForeground(getForeground());
setEnabled(isEnabled());
getPeer().setEnabled(isEnabled());
}
}