java实现多线程的三种方式 dome代码

dome实现

public class TestThread extends Thread{
    
    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            System.out.println("第"+(i+1)+"次打印");
        }
    }

    
    public static void main(String[] args) {
        TestThread testThread = new TestThread();
        //自动调用线程类的run方法
        testThread.start();
    }
}

运行结果

dome实现

public class TestRunnable implements Runnable {
    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            System.out.println("TestRunnable类第"+(i+1)+"次打印");
        }
    }

    
    public static void main(String[] args) {
        //创建业务实现类
        TestRunnable testRunnable = new TestRunnable();
        //创建代理线程
        Thread thread = new Thread(testRunnable);
        //线程启动
        thread.start();

    }
}

运行结果

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


public class TestCallable implements Callable {
    @Override
    public Integer call() throws Exception {
        int i;
        for (i = 0; i < 20; i++) {
            System.out.println("TestCallable类第" + (i + 1) + "次打印");
        }
        return i;
    }

    
    public static void main(String[] args) {
        //获取线程池服务
        ExecutorService es = Executors.newCachedThreadPool();
        //提交处理逻辑
        es.submit(new TestCallable());
        //关闭服务
        es.shutdown();
    }
}

运行结果