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ExecutorTest.java
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82 lines (70 loc) · 2.25 KB
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package Thread.createThread;
import java.util.ArrayList;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
public class ExecutorTest {
public static void cachedThreadPoolTest(){
// 1.线程池的newCachedThreadPool
ExecutorService executorService = Executors.newCachedThreadPool();
for (int i = 0; i < 5; i++) {
executorService.execute(new LiftOff());
//sleep()函数的新
//TimeUnit.MILLISECONDS.sleep(100);
//Thread.yield();
}
}
public static void fixedThreadPoolTest() {
// 2.固定大小的线程池：newFixedThreadPool
ExecutorService executorService2 = Executors.newFixedThreadPool(5);
for (int i = 0; i < 5; i++) {
executorService2.execute(new LiftOff());
}
// shutDown方法：防止其他任务进入Executor。这个程序将在执行完Executor中所有的任务之后退出
executorService2.shutdown();
}
//newSingleThreadExecutor
public static void singleThreadExecutor(){
ExecutorService executorService=Executors.newSingleThreadExecutor();
ArrayList<Future<String>> results=new ArrayList<Future<String>>();
for(int i=0;i<10;i++){
//只能通过executorService.submit方法添加Callable
results.add(executorService.submit(new TaskWithResult(i)));
}
for(Future<String> future:results){
try {
//get()方法将会被阻塞，直到完成
System.out.println(future.get());
} catch (InterruptedException | ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static void main(String[] args) {
cachedThreadPoolTest();
//fixedThreadPoolTest();
//singleThreadExecutor();
/*for(int i=0;i<10;i++){
Thread daemonThread=new Thread(new SimpleDaemon());
daemonThread.setDaemon(true);
daemonThread.start();
}
System.out.println("all daemon start");
try {
TimeUnit.MILLISECONDS.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/
}
}
class SimpleDaemon implements Runnable{
@Override
public void run() {
//TimeUnit.MILLISECONDS.sleep(100);
System.out.println(Thread.currentThread());
}
}