java多线程基础：线程的状态_thread的state枚举类在哪里-优快云博客

本文链接：https://blog.youkuaiyun.com/KeepStrong/article/details/80303361

本文详细介绍了Java中线程的六种状态，包括初始状态、运行状态、堵塞状态、等待状态、超时等待状态和终止状态，并解释了每种状态的具体含义及应用场景。

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打开jdk源码，在Thread类中找到State枚举类。

 /**
     * A thread state.  A thread can be in one of the following states:
     * <ul>
     * <li>{@link #NEW}<br>
     *     A thread that has not yet started is in this state.
     *     </li>
     * <li>{@link #RUNNABLE}<br>
     *     A thread executing in the Java virtual machine is in this state.
     *     </li>
     * <li>{@link #BLOCKED}<br>
     *     A thread that is blocked waiting for a monitor lock
     *     is in this state.
     *     </li>
     * <li>{@link #WAITING}<br>
     *     A thread that is waiting indefinitely for another thread to
     *     perform a particular action is in this state.
     *     </li>
     * <li>{@link #TIMED_WAITING}<br>
     *     A thread that is waiting for another thread to perform an action
     *     for up to a specified waiting time is in this state.
     *     </li>
     * <li>{@link #TERMINATED}<br>
     *     A thread that has exited is in this state.
     *     </li>
     * </ul>
     *
     * <p>
     * A thread can be in only one state at a given point in time.
     * These states are virtual machine states which do not reflect
     * any operating system thread states.
     *
     * @since   1.5
     * @see #getState
     */
    public enum State {
      
        NEW,

   
        RUNNABLE,

   
        BLOCKED,

    
        WAITING,


        TIMED_WAITING,

    
        TERMINATED;
    }

一共有6个状态。

NEW：初始状态，线程被构造，还未执行start（）方法。（在构造方法中是这个状态）

RUNNABLE:运行状态，java 中把就绪和运行两种状态都成为运行中。（正常运行中是这个状态）

BLOCKED:堵塞状态，表示线程堵塞于锁.。（等待锁是这个状态）

WAITTING:等待状态，表示线程进入等待需要其他线程唤醒（调用wait后是这个状态）

TIME_WAITTING:超时等待状态，不同于WAITTING，到达指定时间，自动返回。（wait(long)是这个状态）

TERMINATED:终止状态，代表当前线程执行结束。（线程结束）