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