在java线程中,线程的状态分为6种。官方文档的解释是:
/** * Thread state for a thread which has not yet started. */ 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. */ 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}. */ 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. */ 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> */ TIMED_WAITING, /** * Thread state for a terminated thread. * The thread has completed execution. */ TERMINATED;
NEW:Thread刚刚new出来。
RUNNABLE:start方法已运行,所有条件都就绪。只等该线程获得CPU运行时间。
BLOCKED:等待进入临界区。
WAITING:在使用了wait方法后,等待线程获取CPU时间。
TIMED_WAITING:在使用了wait(long),join(long),sleep(long)等带有限定时间的方法后。
TERMINATED:run方法执行完毕。
interrupt()是对象实例方法
在使用了interrupt()后,线程会将中断标志设置为true。如果线程处于waiting或timed_waiting状态,则会产生一个InterruptedException。
isInterrupted()是对象实例方法
在使用isInterrupted()后,如果中断标志为true则返回true。
Tests whether the current thread has been interrupted. The * <i>interrupted status</i> of the thread is cleared by this method. In * other words, if this method were to be called twice in succession, the * second call would return false (unless the current thread were * interrupted again, after the first call had cleared its interrupted * status and before the second call had examined it). * * <p>A thread interruption ignored because a thread was not alive * at the time of the interrupt will be reflected by this method * returning false.
interrpupted()方法是Thread类的静态方法
第一次使用该方法如果已经中断,则第二次使用时会取消掉该中断。
这就是这三个方法的不同。
时间: 2024-11-08 23:44:20