1.判断线程池中所有线程是否执行完毕
package com.luna.thread;
import java.util.Random;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
public class ThreadsIsDone {
public static void main(String[] args) {
// 创建一个10个线程的线程池
ThreadPoolExecutor pool = new ThreadPoolExecutor(10, 10, 0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>());
for (int i = 0; i < 10; i++) {
pool.submit(new Runnable() {
public void run() {
System.out.println(
"当前线程:" + Thread.currentThread().getName() + ",打印随机数:" + new Random().nextInt(1000));
}
});
}
System.out.println("pool.getTaskCount():" + pool.getTaskCount());
System.out.println("pool.getCompletedTaskCount():" + pool.getCompletedTaskCount());
//当线程池完成的线程数等于线程池中的总线程数
boolean allThreadsIsDone = pool.getTaskCount() == pool.getCompletedTaskCount();
System.out.println(allThreadsIsDone);
if (allThreadsIsDone) {
System.out.println("全部执行完成");
}
while (!allThreadsIsDone) {
allThreadsIsDone = pool.getTaskCount() == pool.getCompletedTaskCount();
if (allThreadsIsDone) {
System.out.println("全部执行完成");
}
}
}
}
- 当调用ExecutorService的shutdown()和awaitTermination()
package com.luna.thread;
import java.util.Random;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
public class ThreadDone {
public static void main(String[] args) {
// 创建一个10个线程的线程池
ThreadPoolExecutor pool = new ThreadPoolExecutor(10, 10, 0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>());
for (int i = 0; i < 10; i++) {
pool.submit(new Runnable() {
public void run() {
System.out.println(
"当前线程:" + Thread.currentThread().getName() + ",打印随机数:" + new Random().nextInt(1000));
}
});
}
pool.shutdown();
try {
pool.awaitTermination(Long.MAX_VALUE, TimeUnit.DAYS);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("all thread complete");
}
}