JAVA中线程的6种状态

下面是jdk源码中关于java线程状态的源码。

public enum State {
	/**
	 * Thread state for a thread which has not yet started.
	 * 线程刚刚被创建，还没有开始。
	 */
	NEW,

	/**
	 * Thread state for a runnable thread.  A thread in the runnable
	 * state is executing in the Java virtual machine but it may
	 * be waiting for other resources from the operating system
	 * such as processor.
	 * 线程已经交由jvm执行了，但是有可能还在等待操作系统的其他资源的准备就绪，比如说处理器。
	 */
	RUNNABLE,

	/**
	 * Thread state for a thread blocked waiting for a monitor lock.
	 * A thread in the blocked state is waiting for a monitor lock
	 * to enter a synchronized block/method or
	 * reenter a synchronized block/method after calling
	 * {@link Object#wait() Object.wait}.
	 * 线程正在等待获取监视器锁，
	 * 当： 1.进入synchronized修饰的代码块/方法时 2.当调用了object.wait方法之后，重新进入synchronized修饰的代码块或者方法
	 */
	BLOCKED,

	/**
	 * Thread state for a waiting thread.
	 * A thread is in the waiting state due to calling one of the
	 * following methods:
	 * <ul>
	 *   <li>{@link Object#wait() Object.wait} with no timeout</li>
	 *   <li>{@link #join() Thread.join} with no timeout</li>
	 *   <li>{@link LockSupport#park() LockSupport.park}</li>
	 * </ul>
	 *
	 * <p>A thread in the waiting state is waiting for another thread to
	 * perform a particular action.
	 *
	 * For example, a thread that has called <tt>Object.wait()</tt>
	 * on an object is waiting for another thread to call
	 * <tt>Object.notify()</tt> or <tt>Object.notifyAll()</tt> on
	 * that object. A thread that has called <tt>Thread.join()</tt>
	 * is waiting for a specified thread to terminate.
	 * 线程处于等待状态
	 * 当调用了如下方法时：1.object.wait 2.thread.join 3.LockSupport.park
	 */
	WAITING,

	/**
	 * Thread state for a waiting thread with a specified waiting time.
	 * A thread is in the timed waiting state due to calling one of
	 * the following methods with a specified positive waiting time:
	 * <ul>
	 *   <li>{@link #sleep Thread.sleep}</li>
	 *   <li>{@link Object#wait(long) Object.wait} with timeout</li>
	 *   <li>{@link #join(long) Thread.join} with timeout</li>
	 *   <li>{@link LockSupport#parkNanos LockSupport.parkNanos}</li>
	 *   <li>{@link LockSupport#parkUntil LockSupport.parkUntil}</li>
	 * </ul>
	 * 带时间的等待
	 * 当调用了如下的方法时： 1.thread.sleep 2.Object.wait(long) 
	 * 3.Thread.join(long) 4.LockSupport.parkNanos 5.LockSupport.parkUntil
	 */
	TIMED_WAITING,

	/**
	 * Thread state for a terminated thread.
	 * The thread has completed execution.
	 * 退出状态
	 * 线程已经执行完成
	 */
	TERMINATED;
}