Java線程中start()和run()的區別

run():不管是通過實現Runnable接口還是繼承Thread類（其實Thread中的run方法也是調用了Runnable接口的run方法），調用run()方法僅僅是相當於調用了一個方法，沒有啓用新的線程。

start():會啓動一個新線程，運行重寫的run(）代碼。

例子：

public class MyThread {

    public static void main(String[] args) {
        SThread sThread = new SThread();
        sThread.run();
        sThread.start();
        S2Thread s2Thread = new S2Thread();
        s2Thread.run();
    }
}
class SThread extends Thread {
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + " run method run() by Class Thread");
    }
}
class S2Thread implements Runnable {
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + " run method run() by Interface Runnable");
    }
}

結果：

main run method run() by Class Thread
Thread-0 run method run() by Class Thread
main run method run() by Interface Runnable

參考文章：線程中run()和start()的區別