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線程的狀態(tài)

線程對象在不同的運(yùn)行時(shí)期有不同的狀態(tài)，狀態(tài)信息就存在與State枚舉類中。

驗(yàn)證New,Runnable，Terminated

new:線程實(shí)例化后還從未執(zhí)行start()方法時(shí)的狀態(tài)

runnable：線程進(jìn)入運(yùn)行的狀態(tài)

terminated：線程被銷毀時(shí)的狀態(tài)

package Seven;public class MyThread extends Thread {public MyThread() {System.out.println("構(gòu)造方法中的狀態(tài)：" + Thread.currentThread().getState());}@Overridepublic void run() {System.out.println("run方法中的狀態(tài)：" + Thread.currentThread().getState());} } package Seven;public class Run {// NEW,// RUNNABLE,// TERMINATED,// BLOCKED,// WAITING,// TIMED_WAITING,public static void main(String[] args) {try {MyThread t = new MyThread();System.out.println("main方法中的狀態(tài)1：" + t.getState());Thread.sleep(1000);t.start();Thread.sleep(1000);System.out.println("main方法中的狀態(tài)2：" + t.getState());} catch (InterruptedException e) {// TODO Auto-generated catch block e.printStackTrace();}}}

注意：構(gòu)造方法中的日志時(shí)main主線程的

驗(yàn)證Time_waiting

Time_waiting：線程執(zhí)行了Thread.sleep（）

package Seven;public class MyThread extends Thread {@Overridepublic void run() {try {System.out.println("begin sleep");Thread.sleep(10000);System.out.println(" end sleep");} catch (InterruptedException e) {e.printStackTrace();}} } package Seven;public class Run {// NEW,// RUNNABLE,// TERMINATED,// BLOCKED,// WAITING,// TIMED_WAITING,public static void main(String[] args) {try {MyThread t = new MyThread();t.start();Thread.sleep(1000);System.out.println("main方法中的狀態(tài)：" + t.getState());} catch (InterruptedException e) {// TODO Auto-generated catch block e.printStackTrace();}} }

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?驗(yàn)證Blocked

blocked:出現(xiàn)在某一個(gè)線程等待鎖的時(shí)候

package Seven;public class MyService {synchronized static public void serviceMethod() {try {System.out.println(Thread.currentThread().getName() + "進(jìn)入了業(yè)務(wù)方法！");Thread.sleep(10000);} catch (InterruptedException e) {e.printStackTrace();}}} package Seven;public class MyThread1 extends Thread {@Overridepublic void run() {MyService.serviceMethod();}} package Seven;public class MyThread2 extends Thread {@Overridepublic void run() {MyService.serviceMethod();}} package Seven;public class Run {// NEW,// RUNNABLE,// TERMINATED,// BLOCKED,// WAITING,// TIMED_WAITING,public static void main(String[] args) throws InterruptedException {MyThread1 t1 = new MyThread1();t1.setName("a");t1.start();MyThread2 t2 = new MyThread2();t2.setName("b");t2.start();//Thread.sleep(1000);System.out.println("main方法中的t2狀態(tài)：" + t2.getState());} }

驗(yàn)證waiting

waiting：是線程執(zhí)行了object.wait()方法后所處的狀態(tài)

package Seven;public class Lock {public static final Byte lock = new Byte("0");} package Seven;public class MyThread extends Thread {@Overridepublic void run() {try {synchronized (Lock.lock) {Lock.lock.wait();}} catch (InterruptedException e) {e.printStackTrace();}} } package Seven;public class Run {// NEW,// RUNNABLE,// TERMINATED,// BLOCKED,// WAITING,// TIMED_WAITING,public static void main(String[] args) {try {MyThread t = new MyThread();t.start();Thread.sleep(1000);System.out.println("main方法中的t狀態(tài)：" + t.getState());} catch (InterruptedException e) {// TODO Auto-generated catch block e.printStackTrace();}} }

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轉(zhuǎn)載于:https://www.cnblogs.com/Michael2397/p/7860193.html

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