重学JAVA基础(四):线程的创建与执行

1.继承Thread

　　

public class TestThread extends Thread{

    public void run(){
        System.out.println(Thread.currentThread().getName());
    }
    
    public static void main(String[] args) {
        Thread t = new TestThread();
        t.start();
    }
}

 

2.实现Runnable

public class TestRunnable implements Runnable
{

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName());
        
    }

    public static void main(String[] args) {
        Thread t = new Thread(new TestRunnable());
        t.start();
    }
}

 

3.线程池

public class TestThreadPool {
    
    public static ExecutorService singlePool = Executors.newSingleThreadExecutor();
    
    private static ExecutorService fixedPool = Executors.newFixedThreadPool(2);
    
    private static ExecutorService cachedPool = Executors.newCachedThreadPool();
    
    private static ThreadPoolExecutor tpe = new ThreadPoolExecutor(5, 10, 5000, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(), new DefaultThreadFactory(),new ThreadPoolExecutor.AbortPolicy());

    private static class DefaultThreadFactory implements ThreadFactory{
        @Override
        public Thread newThread(Runnable r) {
            Thread t = new Thread(r);
            return t;
        }
    }
    
    public static void main(String[] args) {
        singlePool.execute(new TestThreadP());
        fixedPool.execute(new TestThreadP());
        cachedPool.execute(new TestThreadP());
        tpe.execute(new TestThreadP());
    }
    
    
}
class TestThreadP implements Runnable{
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName());
    }
    
}