97 lines
3.4 KiB
Java
97 lines
3.4 KiB
Java
/*
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* Copyright (c) 2015, 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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import java.awt.EventQueue;
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import javax.swing.JFrame;
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import javax.swing.JScrollPane;
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import javax.swing.JTextArea;
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/**
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* @test
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* @key headful
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* @bug 8072775
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* @run main/othervm -Xmx80m TextViewOOM
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*/
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public class TextViewOOM {
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private static JFrame frame;
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private static JTextArea ta;
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private static final String STRING = "\uDC00\uD802\uDFFF";
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private static final int N = 5000;
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private static void createAndShowGUI() {
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frame = new JFrame();
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final JScrollPane jScrollPane1 = new JScrollPane();
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ta = new JTextArea();
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ta.setEditable(false);
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ta.setColumns(20);
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ta.setRows(5);
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jScrollPane1.setViewportView(ta);
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frame.add(ta);
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frame.pack();
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frame.setLocationRelativeTo(null);
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frame.setVisible(true);
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}
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public static void main(final String[] args) throws Exception {
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/* Create and display the form */
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EventQueue.invokeAndWait(TextViewOOM::createAndShowGUI);
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for (int i = 0; i < 10; i++) {
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System.gc();
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Thread.sleep(1000);
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}
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long mem = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
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System.err.println("Memory before creating the text: "+mem);
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final StringBuilder sb = new StringBuilder(N * STRING.length());
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for (int i = 0; i < N; i++) {
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sb.append(STRING);
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}
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for (int i = 0; i < 10; i++) {
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System.gc();
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Thread.sleep(1000);
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}
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mem = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
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System.err.println("Memory after creating the text: "+mem);
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EventQueue.invokeAndWait(() -> {
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ta.setText(sb.toString());
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for (int i = 0; i < 10; i++) {
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System.gc();
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try {Thread.sleep(200);} catch (InterruptedException iex) {}
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}
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long mem1 = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
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System.err.println("Memory after setting the text: " + mem1);
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});
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for (int i = 0; i < 10; i++) {
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System.gc();
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Thread.sleep(1000);
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}
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mem = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
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System.err.println("Final memory after everything: " + mem);
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EventQueue.invokeAndWait(frame::dispose);
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}
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}
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