一个高深的多线程有关问题—— 多线程中的多态机制

一个高深的多线程问题—— 多线程中的多态机制
线程thread类中的start方法是如何调用到实现runnable接口的类中的run方法的？
我查看了jvm的源代码，但是还是没有找到答案，欢迎大家各抒己见咯！

[解决办法]

Java code

public Thread() {    this(null, null, newName());}public Thread(Runnable runnable) {    this(null, runnable, newName());}public Thread(ThreadGroup group, Runnable runnable, String threadName) {    super();    if (threadName==null) throw new NullPointerException();    this.name = threadName;        // We avoid the public API 'setName', since it does redundant work (checkAccess)    this.runnable = runnable;    // No API available here, so just direct access to inst. var.    Thread currentThread  = currentThread();    this.isDaemon = currentThread.isDaemon(); // We avoid the public API 'setDaemon', since it does redundant work (checkAccess)    if (group == null) {        SecurityManager currentManager = System.getSecurityManager();         // if there is a security manager...        if (currentManager != null)            // Ask SecurityManager for ThreadGroup            group = currentManager.getThreadGroup();    }    if (group == null)        // Same group as Thread that created us        group = currentThread.getThreadGroup();    initialize(false, group, currentThread);    setPriority(currentThread.getPriority());    // In this case we can call the public API according to the spec - 20.20.10}public void run() {    if (runnable != null) {        runnable.run();    }}
[解决办法]
看了下，是调用了native方法，这不是多态，是用了JNI
[解决办法]
Java code
public synchronized void start() {     synchronized(lock) {         if (started) {             // K0341 = Thread is already started             throw new IllegalThreadStateException(com.ibm.oti.util.Msg.getString("K0341"));         }         boolean success = false;         threadGroup.add(this);        try {             startImpl();             success = true;         } finally {             if (!success) {                  threadGroup.remove(this);             }         }    } }private native void startImpl();