传统的实现线程的方式为三种,分别为继承Thread类,重写run()方法;实现Runable接口,重写run()方法;实现callable接口,重写call()方法;下面来记录一下最基本的三种编码实现。
一、继承Thread
public class ExtendsThread extends Thread{ public void run(){
System.out.println("Hello Thread");
} public static void main(String[] args) {
ExtendsThread et1 = new ExtendsThread();
ExtendsThread et2 = new ExtendsThread();
et1.start();
et2.start();
}}
二、实现Runnable接口
public class ImplementsRunable implements Runnable { public void run() {
System.out.println("Hello Thread");
} public static void main(String[] args) {
ImplementsRunable ir1 = new ImplementsRunable();
ImplementsRunable ir2 = new ImplementsRunable();
new Thread(ir1).start();
new Thread(ir2).start();
}
}
三、实现callable接口
public class ImplementsCallable implements Callable { private int id; public ImplementsCallable(int id){
this.id = id;
} public String call() throws Exception {
return "This Thread Id Is : "+this.getId();
} public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public static void main(String[] args) throws ExecutionException, InterruptedException {
ExecutorService es = Executors.newCachedThreadPool();
List<Future<String>> results = new ArrayList();
for(int i=1;i<=10;i++){
results.add(es.submit(new ImplementsCallable(i)));
}
Thread.sleep(10000);
for(Future<String> fs : results){
if (fs.isDone()) {
System.out.println(fs.get());
} else {
System.out.println("The Thread is not down yet");
}
}
es.shutdown();
}
}
注:ExecutorService的execute()方法没有返回值,而submit()方法有返回值,类型为Future<T>。