java 多线程总结

package

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

public class conclusion {
    public static void main(String[] args) {

        new MyThread1().start();

        new Thread(new MyThread2()).start();

        FutureTask futureTask =new FutureTask(new MyThread3());
        new Thread(futureTask).start();
        try {
            futureTask.get();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
    }
}


//1. 继承thread类
class MyThread1 extends Thread{
    @Override
    public void run() {
        System.out.println("thread 1");
    }
}

//2.实现runnable接口
class MyThread2 implements Runnable{

    @Override
    public void run() {
        System.out.println("thread 2");
    }

}

//实现callable接口
class MyThread3 implements Callable {

    @Override
    public Integer call() throws Exception {
        System.out.println("thread 3");
        return null;
    }
}