继承Thread类
class MyThread extends Thread {public void run() {// 线程执行的代码}}public class Main {public static void main(String[] args) {MyThread thread1 = new MyThread();MyThread thread2 = new MyThread();thread1.start();thread2.start();}}
实现Runnable接口
class MyRunnable implements Runnable {public void run() {// 线程执行的代码}}public class Main {public static void main(String[] args) {MyRunnable myRunnable = new MyRunnable();Thread thread1 = new Thread(myRunnable);Thread thread2 = new Thread(myRunnable);thread1.start();thread2.start();}}
实现Callable接口并通过FutureTask包装器
class MyCallable implements Callable{ public Integer call() {// 线程执行的代码,返回计算结果return 0;}}public class Main {public static void main(String[] args) throws ExecutionException, InterruptedException {MyCallable myCallable = new MyCallable();FutureTaskfutureTask = new FutureTask<>(myCallable); Thread thread = new Thread(futureTask);thread.start();Integer result = futureTask.get(); // 获取计算结果}}

使用ExecutorService, Callable, Future
ExecutorService executor = Executors.newFixedThreadPool(2);Futurefuture = executor.submit(new MyCallable()); // 可以在这里做其他事情Integer result = future.get(); // 获取计算结果executor.shutdown();
以上方法都可以用于实现多线程计算,但使用`ExecutorService`的方法更加灵活和高效,特别是当你需要管理多个线程时。使用`ExecutorService`可以控制线程池的大小,复用线程,以及优雅地关闭线程池。
请根据你的具体需求选择合适的方法来实现多线程计算
