1 /* 2 * Copyright (C) 2014 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 17 import java.util.Map; 18 19 public class Main implements Runnable { 20 static final int numberOfThreads = 5; 21 static final int totalOperations = 1000; 22 23 public static void main(String[] args) throws Exception { 24 final Thread[] threads = new Thread[numberOfThreads]; 25 for (int t = 0; t < threads.length; t++) { 26 threads[t] = new Thread(new Main()); 27 threads[t].start(); 28 } 29 for (Thread t : threads) { 30 t.join(); 31 } 32 System.out.println("Finishing"); 33 } 34 35 public void test_getId() { 36 if (Thread.currentThread().getId() <= 0) { 37 System.out.println("current thread's ID is not positive"); 38 } 39 // Check all the current threads for positive IDs. 40 Map<Thread, StackTraceElement[]> stMap = Thread.getAllStackTraces(); 41 for (Thread thread : stMap.keySet()) { 42 if (thread.getId() <= 0) { 43 System.out.println("thread's ID is not positive: " + thread.getName()); 44 } 45 } 46 } 47 48 public void run() { 49 for (int i = 0; i < totalOperations; ++i) { 50 test_getId(); 51 } 52 } 53 } 54
