1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.awt.*;
  25 import java.awt.image.BufferedImage;
  26 import java.lang.ref.PhantomReference;
  27 import java.lang.ref.ReferenceQueue;
  28 import java.util.ArrayList;
  29 import java.util.Vector;
  30 
  31 /*
  32  * @test
  33  * @summary Verify that disposed frames are collected with GC
  34  * @author Dmitriy Ermashov (dmitriy.ermashov@oracle.com)
  35  * @library ../../../../lib/testlibrary
  36  * @build ExtendedRobot
  37  * @run main/othervm -Xmx20m FramesGC
  38  */
  39 
  40 
  41 public class FramesGC {
  42 
  43     ExtendedRobot robot;
  44     ArrayList<PhantomReference<Frame>> refs = new ArrayList<PhantomReference<Frame>>();
  45     ReferenceQueue<Frame> que = new ReferenceQueue<Frame>();
  46 
  47     public static void main(String []args) throws Exception {
  48         new FramesGC().doTest();
  49     }
  50 
  51     FramesGC() throws Exception{
  52         robot = new ExtendedRobot();
  53     }
  54 
  55     void doTest() throws Exception {
  56         for( int i = 1; i <= 3; i++) {
  57             final int j = i;
  58             EventQueue.invokeAndWait(() -> {
  59                 createFrame(j);
  60             });
  61         }
  62         robot.waitForIdle();
  63 
  64         for (Frame f : Frame.getFrames())
  65             f.dispose();
  66 
  67         robot.waitForIdle();
  68 
  69         Vector garbage = new Vector();
  70         while (true) {
  71             try {
  72                 garbage.add(new byte[1000]);
  73             } catch (OutOfMemoryError er) {
  74                 break;
  75             }
  76         }
  77         garbage = null;
  78 
  79         int count = 1;
  80         for(; count <= 3; count++)
  81             if(que.remove(5000) == null)
  82                 break;
  83 
  84         System.out.println("Total no of instances eligible for GC = " + count);
  85         if(count < 3)
  86             throw new RuntimeException("Count = "+count+". Test failed!");
  87 
  88     }
  89 
  90     void createFrame(int i){
  91         Frame frame = new Frame("Frame " + i);
  92 
  93         Button button=new Button("Press Me");
  94         TextArea textArea=new TextArea(5,5);
  95         TextField textField=new TextField(10);
  96         Choice choice=new Choice();
  97         choice.add("One");
  98         choice.add("Two");
  99         choice.add("Three");
 100         choice.add("Four");
 101         choice.add("Five");
 102         List list = new List();
 103         list.add("One");
 104         list.add("Two");
 105         list.add("Three");
 106         list.add("Four");
 107         list.add("Five");
 108         Checkbox checkBox= new Checkbox("Hai");
 109         Scrollbar scrollBar=new Scrollbar(Scrollbar.VERTICAL,0,1,0,200);
 110         CheckboxGroup checkboxGroup=new CheckboxGroup();
 111         Checkbox radioButton=new Checkbox("Hello" ,true, checkboxGroup);
 112         Canvas canvas=new Canvas();
 113         canvas.setSize(100, 100);
 114         canvas.setBackground(java.awt.Color.red);
 115         Label label=new Label("I am label.!");
 116         Cursor customCursor=null;
 117 
 118         frame.setLayout(new java.awt.FlowLayout());
 119 
 120         button.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
 121         label.setCursor(new Cursor(Cursor.TEXT_CURSOR));
 122         choice.setCursor(new Cursor(Cursor.WAIT_CURSOR));
 123         list.setCursor(new Cursor(Cursor.HAND_CURSOR));
 124         checkBox.setCursor(new Cursor(Cursor.MOVE_CURSOR));
 125         radioButton.setCursor(new Cursor(Cursor.SE_RESIZE_CURSOR));
 126         scrollBar.setCursor(new Cursor(Cursor.NW_RESIZE_CURSOR));
 127         canvas.setCursor(new Cursor(Cursor.W_RESIZE_CURSOR));
 128         textField.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
 129 
 130         /* create a custom cursor */
 131         Toolkit toolkit = Toolkit.getDefaultToolkit();
 132         Dimension d = toolkit.getBestCursorSize(32,32);
 133         int color = toolkit.getMaximumCursorColors();
 134 
 135         if(!d.equals(new Dimension(0,0)) && color != 0 )
 136             customCursor = toolkit.createCustomCursor(new BufferedImage( 16, 16, BufferedImage.TYPE_INT_RGB ), new Point(10, 10), "custom cursor.");
 137         else
 138             System.err.println("Platform doesn't support to create a custom cursor.");
 139 
 140         textArea.setCursor(customCursor);
 141         frame.add(label);
 142         frame.add(button);
 143         frame.add(choice);
 144         frame.add(list);
 145         frame.add(checkBox);
 146         frame.add(radioButton);
 147         frame.add(scrollBar);
 148         frame.add(canvas);
 149         frame.add(textArea);
 150         frame.add(textField);
 151         frame.add(button);
 152 
 153         frame.setLocation(20, 140 * i);
 154         frame.pack();
 155         frame.setVisible(true);
 156         refs.add(new PhantomReference<Frame>(frame, que));
 157     }
 158 
 159 }