Java 创建线程有哪几种方法

class SampleThread extends Thread {
    //重写run方法，线程运行后，跑的就是run方法 
    public void run(){
       //System.out.println("");
    }
 
    public static void main(String[] args){
       Thread t1 = new SampleThread();
       Thread t2 = new SampleThread();
       t1.start();  //线程运行,调用的 run()方法.
       t2.start(); //线程运行,调用的 run()方法..  
    }
} 

class A implements Runnable{
 
    @Override
    public void run() {
        // implement run method here 
    }
 
    public static void main() {
        final A obj = new A();
 
        Thread t1 = new Thread(new A());
 
        t1.start();
    }
 
}

class MyCallable implements Callable {
    @Override
    public Integer call() throws Exception {
        int sum = 0;
        for (int i = 1; i <= 100; i++) {
            sum += i;
        }
        return sum;
    }
 
    public static void main(String[] args) throws Exception {
        MyCallable mc = new MyCallable(); //实例化 callable
 
        FutureTask oneTask = new FutureTask(mc); //用FutureTask包裹
        Thread oneThread = new Thread(oneTask); //用Thread包裹
        oneThread.start();
        System.out.print(oneTask.get()); //获取返回值
    }
}

FutureTask<Integer> task=new FutureTask<Integer>(()->{
	throw new Exception("自定义异常");
});
 
new Thread(task).start();
 
try {
	System.out.println(task.get());
} catch (Exception e) {
	System.out.println(e.getMessage());
}

ExecutorService es = Executors.newCachedThreadPool();
Runnable r = <your runnable here>;
es.execute(r);