- public synchronized void start() {
- /**
- * This method is not invoked for the main method thread or "system"
- * group threads created/set up by the VM. Any new functionality added
- * to this method in the future may have to also be added to the VM.
- *
- * A zero status value corresponds to state "NEW".
- */
- if (threadStatus != 0)
- throw new IllegalThreadStateException();
- /* Notify the group that this thread is about to be started
- * so that it can be added to the group's list of threads
- * and the group's unstarted count can be decremented. */
- group.add(this);
- boolean started = false;
- try {
- start0();
- started = true;
- } finally {
- try {
- if (!started) {
- group.threadStartFailed(this);
- }
- } catch (Throwable ignore) {
- /* do nothing. If start0 threw a Throwable then
- it will be passed up the call stack */
- }
- }
- }
- private native void start0();
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最终调用的是native的方法,如果你复写start而没有达到调用平台的开启线程的方法的话,线程应该是启动不了的 |