Main.java revision 6ff6ec6b6361db707e4b0318075fc38dd319a49a 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17public class Main {
18    public static void main(String[] args) {
19        checkExceptions();
20        checkTiming();
21    }
22
23    public static void sleep(int msec) {
24        try {
25            Thread.sleep(msec);
26        } catch (InterruptedException ie) {
27            System.err.println("sleep interrupted");
28        }
29    }
30
31    static void checkExceptions() {
32        try {
33            System.out.println(PartialInit.FIELD0);
34            System.err.println("Construction of PartialInit succeeded unexpectedly");
35        } catch (ExceptionInInitializerError eiie) {
36            System.out.println("Got expected EIIE for FIELD0");
37        }
38
39        try {
40            System.out.println(PartialInit.FIELD0);
41            System.err.println("Load of FIELD0 succeeded unexpectedly");
42        } catch (NoClassDefFoundError ncdfe) {
43            System.out.println("Got expected NCDFE for FIELD0");
44        }
45        try {
46            System.out.println(PartialInit.FIELD1);
47            System.err.println("Load of FIELD1 succeeded unexpectedly");
48        } catch (NoClassDefFoundError ncdfe) {
49            System.out.println("Got expected NCDFE for FIELD1");
50        }
51    }
52
53    static void checkTiming() {
54        FieldThread fieldThread = new FieldThread();
55        MethodThread methodThread = new MethodThread();
56
57        fieldThread.start();
58        methodThread.start();
59
60        /* start class init */
61        IntHolder zero = SlowInit.FIELD0;
62
63        /* wait for children to complete */
64        try {
65            fieldThread.join();
66            methodThread.join();
67        } catch (InterruptedException ie) {
68            System.err.println(ie);
69        }
70
71        /* print all values */
72        System.out.println("Fields (main thread): " +
73            SlowInit.FIELD0.getValue() + SlowInit.FIELD1.getValue() +
74            SlowInit.FIELD2.getValue() + SlowInit.FIELD3.getValue());
75    }
76
77    static class FieldThread extends Thread {
78        public void run() {
79            /* allow class init to start */
80            Main.sleep(200);
81
82            /* collect fields; should delay until class init completes */
83            int field0, field1, field2, field3;
84            field0 = SlowInit.FIELD0.getValue();
85            field1 = SlowInit.FIELD1.getValue();
86            field2 = SlowInit.FIELD2.getValue();
87            field3 = SlowInit.FIELD3.getValue();
88
89            /* let MethodThread print first */
90            Main.sleep(400);
91            System.out.println("Fields (child thread): " +
92                field0 + field1 + field2 + field3);
93        }
94    }
95
96    static class MethodThread extends Thread {
97        public void run() {
98            /* allow class init to start */
99            Main.sleep(200);
100
101            /* use a method that shouldn't be accessible yet */
102            SlowInit.printMsg("MethodThread message");
103        }
104    }
105}
106