Java之线程编程的4种方法实现案例讲解

public class T4 {
	public static void main(String[] args) {
		System.out.println(Thread.currentThread());
		Thread t1 = new A1();
		t1.start();
	}
}
class A1 extends Thread{
	@Override
	public void run() {
		for(int i=0;i<10;i++) {
			System.out.println("Thread:"+Thread.currentThread().getName());
		}
	}
}

public class T3 {
	public static void main(String[] args) {
		System.out.println("Thread:"+Thread.currentThread().getName());
		Thread t1 = new Thread(new A2());
		t1.start();
	}

}
class A2 implements Runnable{
	@Override
	public void run() {
		int res =0;
		for(int i=0;i<10;i++) {
			res+=i;
		System.out.println("Thread:"+Thread.currentThread().getName());
		}
	}
}

import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;

public class T2 {
	public static void main(String[] args) throws Exception {
		System.out.println("Test3:" + Thread.currentThread().getName());
		Callable c = new A4();
		FutureTask ft = new FutureTask(c);
		Thread t1 = new Thread(ft);
		t1.start();
		Object res = ft.get();
		System.out.println("结果:" + res);
	}
}
class A4 implements Callable {
	@Override
	public Object call() throws Exception {
		int res = 0;
		for (int i = 0; i < 10; i++) {
			res += i;
			System.out.println("Thread:" + Thread.currentThread().getName());
		}
		return res;
	}
}

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class T1 {
	public static void main(String[] args) throws Exception {
		Future[] arr = new Future[5];
		ExecutorService es = Executors.newFixedThreadPool(3);
		for (int i = 0; i < 5; i++) {
			arr[i] = es.submit(new A4());
		}
		for (Future f : arr) {
			Object res = f.get();
			System.out.println("结果为：" + res);
		}
		es.shutdown();
	}
}

class A4 implements Callable {
	@Override
	public Object call() throws Exception {
		int res = 0;
		for (int i = 0; i < 10; i++) {
			res += i;
			System.out.println("Thread" + Thread.currentThread().getName());
		}
		return res;
	}
}