FramesGC.java revision 12677:a4299d47bd00 
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
24import java.awt.*;
25import java.awt.image.BufferedImage;
26import java.lang.ref.PhantomReference;
27import java.lang.ref.ReferenceQueue;
28import java.util.ArrayList;
29import 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
41public 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}
160