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本篇內容主要講解“Java線程狀態舉例分析”，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線程狀態舉例分析”吧!
下面就一些場景分析鎖和線程的狀態
1、 線程1獲得鎖后不釋放，就是運行狀態（RUNNABLE），線程2就是休眠狀態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（RUNNABLE），線程2未獲得鎖就是阻塞狀態（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TIMED_WAITING (sleeping)，線程2未獲得鎖就是阻塞狀態（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WAITING (on object monitor)，線程2sleep就是休眠狀態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TIMED_WAITING (on object monitor)，線程2sleep就是休眠狀態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獲得鎖繼續執行
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線程狀態舉例分析”有了更深的了解，不妨來實際操作一番吧！這里是億速云網站，更多相關內容可以進入相關頻道進行查詢，關注我們，繼續學習！
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