Thread狀態

Thread thread1=new Thread(new ExtendThread(), "thread1 "); Thread thread2=new Thread(thread1, "thread2 "); thread1.start();
thread2.start();

thread1.start();       // START

這會拋出錯誤訊息IllegalMonitorStateException 

因為Thread已進入

所以到了RUNNABLE狀態,start只有New狀態下才可呼叫

Thread有以下幾種狀態

NEW
RUNNABLE
BLOCKED
WAITING
TIMED_WAITING
TERMINATED