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Java線程狀態(tài)舉例分析

本篇內(nèi)容主要講解“Java線程狀態(tài)舉例分析”，感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷，實用性強。下面就讓小編來帶大家學習“Java線程狀態(tài)舉例分析”吧!

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Java線程狀態(tài)舉例分析

下面就一些場景分析鎖和線程的狀態(tài)

1、 線程1獲得鎖后不釋放，就是運行狀態(tài)（RUNNABLE），線程2就是休眠狀態(tài)TIMED_WAITING (sleeping)

package com.example.demo.thread.threadstate;

public class ThreadState1 implements Runnable{
    @Override
    public void run() {
        System.out.println("ThreadState1---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState1---get---lock");
                while(true){}
            }catch (Exception e){
            }
        }
    }
}
package com.example.demo.thread.threadstate;

public class ThreadState2 implements Runnable {

    @Override
    public void run() {
        try {
            Thread.sleep(30000);
        }catch (Exception e){

        }
    }
}
"Thread-1" #13 prio=5 os_prio=0 tid=0x000000001a51b800 nid=0x42b8 waiting on condition [0x000000001b47f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at com.example.demo.thread.threadstate.ThreadState2.run(ThreadState2.java:14)
        at java.lang.Thread.run(Thread.java:748)

   Locked ownable synchronizers:
        - None

"Thread-0" #12 prio=5 os_prio=0 tid=0x000000001a51b000 nid=0x6d5c runnable [0x000000001b37e000]
   java.lang.Thread.State: RUNNABLE
        at com.example.demo.thread.threadstate.ThreadState1.run(ThreadState1.java:10)
        - locked <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

2、線程1獲得鎖后不釋放，就是運行狀態(tài)（RUNNABLE），線程2未獲得鎖就是阻塞狀態(tài)（BLOCKED）

package com.example.demo.thread.threadstate;

public class ThreadState1 implements Runnable{
    @Override
    public void run() {
        System.out.println("ThreadState1---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState1---get---lock");
                while(true){}
            }catch (Exception e){
            }
        }
    }
}
package com.example.demo.thread.threadstate;

import sun.misc.Unsafe;

public class ThreadState2 implements Runnable {

    @Override
    public void run() {
        try {
            Thread.sleep(30000);
        }catch (Exception e){

        }
        System.out.println("ThreadState2---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState2---get---lock");
            }catch (Exception e){

            }
            ThreadStateTest.class.notify();
        }
        System.out.println("ThreadState2---end");
    }
}
"Thread-1" #13 prio=5 os_prio=0 tid=0x000000001a51b800 nid=0x42b8 waiting for monitor entry [0x000000001b47f000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at com.example.demo.thread.threadstate.ThreadState2.run(ThreadState2.java:21)
        - waiting to lock <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

   Locked ownable synchronizers:
        - None

"Thread-0" #12 prio=5 os_prio=0 tid=0x000000001a51b000 nid=0x6d5c runnable [0x000000001b37e000]
   java.lang.Thread.State: RUNNABLE
        at com.example.demo.thread.threadstate.ThreadState1.run(ThreadState1.java:10)
        - locked <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

3、線程1獲得鎖后sleep，就是休眠狀態(tài)TIMED_WAITING (sleeping)，線程2未獲得鎖就是阻塞狀態(tài)（BLOCKED），這說明sleep不釋放鎖

package com.example.demo.thread.threadstate;

public class ThreadState1 implements Runnable{
    @Override
    public void run() {
        System.out.println("ThreadState1---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState1---get---lock");
                System.out.println("ThreadState1---begin---sleep");
                Thread.sleep(30000);
                System.out.println("ThreadState1---end---sleep");
            }catch (Exception e){

            }
        }
    }
}
package com.example.demo.thread.threadstate;

import sun.misc.Unsafe;

public class ThreadState2 implements Runnable {

    @Override
    public void run() {
        try {
            Thread.sleep(5000);
        }catch (Exception e){

        }
        System.out.println("ThreadState2---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState2---get---lock");
            }catch (Exception e){

            }
            ThreadStateTest.class.notify();
        }
        System.out.println("ThreadState2---end");
    }
}
"Thread-1" #13 prio=5 os_prio=0 tid=0x000000001aea0800 nid=0x33c waiting for monitor entry [0x000000001bdef000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at com.example.demo.thread.threadstate.ThreadState2.run(ThreadState2.java:17)
        - waiting to lock <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

   Locked ownable synchronizers:
        - None

"Thread-0" #12 prio=5 os_prio=0 tid=0x000000001ae86000 nid=0xb50 waiting on condition [0x000000001bcef000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at com.example.demo.thread.threadstate.ThreadState1.run(ThreadState1.java:11)
        - locked <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

4、線程1獲得鎖后wait，就是等待狀態(tài)WAITING (on object monitor)，線程2sleep就是休眠狀態(tài)TIMED_WAITING (sleeping)

package com.example.demo.thread.threadstate;

public class ThreadState1 implements Runnable{
    @Override
    public void run() {
        System.out.println("ThreadState1---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState1---get---lock");
                System.out.println("ThreadState1---begin---wait");
                ThreadStateTest.class.wait();
                System.out.println("ThreadState1---end---wait");
            }catch (Exception e){

            }
        }
    }
}
package com.example.demo.thread.threadstate;

import sun.misc.Unsafe;

public class ThreadState2 implements Runnable {

    @Override
    public void run() {
        try {
            Thread.sleep(5000);
        }catch (Exception e){

        }
        System.out.println("ThreadState2---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState2---get---lock");
                Thread.sleep(20000);
            }catch (Exception e){

            }
            ThreadStateTest.class.notify();
        }
        System.out.println("ThreadState2---end");
    }
}
"Thread-1" #13 prio=5 os_prio=0 tid=0x000000001ae49800 nid=0x73c8 waiting on condition [0x000000001bd4f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at com.example.demo.thread.threadstate.ThreadState2.run(ThreadState2.java:18)
        - locked <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

   Locked ownable synchronizers:
        - None

"Thread-0" #12 prio=5 os_prio=0 tid=0x000000001ae3d000 nid=0x6d18 in Object.wait() [0x000000001bc4f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Object.wait(Object.java:502)
        at com.example.demo.thread.threadstate.ThreadState1.run(ThreadState1.java:11)
        - locked <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

5、線程1獲得鎖后wait，就是等待狀態(tài)TIMED_WAITING (on object monitor)，線程2sleep就是休眠狀態(tài)TIMED_WAITING (sleeping)

package com.example.demo.thread.threadstate;

public class ThreadState1 implements Runnable{
    @Override
    public void run() {
        System.out.println("ThreadState1---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState1---get---lock");
                System.out.println("ThreadState1---begin---wait");
                ThreadStateTest.class.wait(4000);
                System.out.println("ThreadState1---end---wait");
            }catch (Exception e){

            }
        }
    }
}
package com.example.demo.thread.threadstate;

import sun.misc.Unsafe;

public class ThreadState2 implements Runnable {

    @Override
    public void run() {
        try {
            Thread.sleep(5000);
        }catch (Exception e){

        }
        System.out.println("ThreadState2---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState2---get---lock");
                Thread.sleep(20000);
            }catch (Exception e){

            }
            ThreadStateTest.class.notify();
        }
        System.out.println("ThreadState2---end");
    }
}
"Thread-1" #13 prio=5 os_prio=0 tid=0x000000001ac1b800 nid=0x6274 waiting on condition [0x000000001bb4f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at com.example.demo.thread.threadstate.ThreadState2.run(ThreadState2.java:18)
        - locked <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

   Locked ownable synchronizers:
        - None

"Thread-0" #12 prio=5 os_prio=0 tid=0x000000001ac1b000 nid=0x4654 in Object.wait() [0x000000001ba4f000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at com.example.demo.thread.threadstate.ThreadState1.run(ThreadState1.java:11)
        - locked <0x00000000d63ffac0> (a java.lang.Class for com.example.demo.thread.threadstate.ThreadStateTest)
        at java.lang.Thread.run(Thread.java:748)

6、線程1獲得鎖后wait，釋放鎖，線程2獲得鎖，釋放鎖后，線程1獲得鎖繼續(xù)執(zhí)行

package com.example.demo.thread.threadstate;

public class ThreadState1 implements Runnable{
    @Override
    public void run() {
        System.out.println("ThreadState1---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState1---get---lock");
                System.out.println("ThreadState1---begin---wait");
                ThreadStateTest.class.wait(10000);
                System.out.println("ThreadState1---end---wait");
            }catch (Exception e){

            }
        }
    }
}
package com.example.demo.thread.threadstate;

import sun.misc.Unsafe;

public class ThreadState2 implements Runnable {

    @Override
    public void run() {
        try {
            Thread.sleep(5000);
        }catch (Exception e){

        }
        System.out.println("ThreadState2---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState2---get---lock");
                Thread.sleep(20000);
            }catch (Exception e){

            }
            ThreadStateTest.class.notify();
        }
        System.out.println("ThreadState2---end");
    }
}
ThreadState1---begin---lock
ThreadState1---get---lock
ThreadState1---begin---wait
ThreadState2---begin---lock
ThreadState2---get---lock
ThreadState2---end
ThreadState1---end---wait

7、線程2ThreadStateTest.class.notify()報錯，在釋放鎖后不能notify

package com.example.demo.thread.threadstate;

public class ThreadState1 implements Runnable{
    @Override
    public void run() {
        System.out.println("ThreadState1---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState1---get---lock");
                System.out.println("ThreadState1---begin---wait");
                ThreadStateTest.class.wait();
                System.out.println("ThreadState1---end---wait");
            }catch (Exception e){

            }
        }
    }
}
package com.example.demo.thread.threadstate;

import sun.misc.Unsafe;

public class ThreadState2 implements Runnable {

    @Override
    public void run() {
        try {
            Thread.sleep(5000);
        }catch (Exception e){

        }
        System.out.println("ThreadState2---begin---lock");
        synchronized (ThreadStateTest.class){
            try {
                System.out.println("ThreadState2---get---lock");
                Thread.sleep(20000);
            }catch (Exception e){

            }
        }
        ThreadStateTest.class.notify();
        System.out.println("ThreadState2---end");
    }
}
Exception in thread "Thread-1" java.lang.IllegalMonitorStateException
	at java.lang.Object.notify(Native Method)
	at com.example.demo.thread.threadstate.ThreadState2.run(ThreadState2.java:23)
	at java.lang.Thread.run(Thread.java:748)

到此，相信大家對“Java線程狀態(tài)舉例分析”有了更深的了解，不妨來實際操作一番吧！這里是創(chuàng)新互聯(lián)網(wǎng)站，更多相關(guān)內(nèi)容可以進入相關(guān)頻道進行查詢，關(guān)注我們，繼續(xù)學習！

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