--- /dev/null 2018-02-27 13:53:36.000000000 +0530 +++ new/test/jdk/java/awt/ScrollPane/bug8195738Test.java 2018-02-27 13:53:34.930244600 +0530 @@ -0,0 +1,92 @@ +/* + * Copyright (c) 2018, 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 + * @key headful + * @bug 8195738 + * @summary scroll poistion in ScrollPane is reset after calling validate() + * @run main/othervm bug8195738Test + */ + +import java.awt.ScrollPane; +import java.awt.BorderLayout; +import java.awt.GridLayout; +import java.awt.Button; +import java.awt.Dimension; +import java.awt.Frame; +import java.awt.Panel; +import java.awt.Point; +import java.awt.Robot; +import java.awt.AWTException; + +public class bug8195738Test extends Frame { + ScrollPane pane; + + public bug8195738Test() { + setBounds(300, 300, 300, 300); + pane = new ScrollPane(ScrollPane.SCROLLBARS_NEVER); + add(pane, BorderLayout.NORTH); + pane.add(new InnerPanel()); + } + + public static void main(String[] args) throws AWTException { + Robot robot = new Robot(); + final bug8195738Test obj = new bug8195738Test(); + obj.setVisible(true); + + // set to some scroll position + obj.pane.setScrollPosition(600, 200); + + // get the newly set position + Point scrollPosition = obj.pane.getScrollPosition(); + + // call validate multiple times + obj.pane.validate(); + robot.delay(1000); + obj.pane.validate(); + robot.delay(1000); + + // compare position after calling the validate function + if(!scrollPosition.equals(obj.pane.getScrollPosition())) { + obj.dispose(); + throw new RuntimeException("Scrolling position is changed in ScrollPane"); + } + + obj.dispose(); + return; + } + + class InnerPanel extends Panel { + public InnerPanel() { + this.setLayout(new GridLayout(2, 4)); + for (int i = 1; i <= 8; i++) { + this.add(new Button("Button" + i)); + } + } + + public Dimension getPreferredSize() { + return new Dimension(980, 200); + } + } +}