Java中的线程互斥问题

来源：互联网发布：淘宝知乎姨编辑：程序博客网时间：2024/04/29 14:45

有如下代码：

public class TraditionalThreadSynchronized {public static void main(String[] args) {new TraditionalThreadSynchronized().init();}public void init() {final Outputer outputer = new Outputer();new Thread(new Runnable() {@Overridepublic void run() {while (true) {try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}outputer.out("bbbbbbbbb");}}}).start();new Thread(new Runnable() {@Overridepublic void run() {while (true) {try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}outputer.out("aaa");}}}).start();}class Outputer {public synchronized void out(String name) {int len = name.length();for (int i = 0; i < len; i++) {System.out.print(name.charAt(i));}System.out.println();}public void out1(String name) {int len = name.length();synchronized (Outputer.class) {for (int i = 0; i < len; i++) {System.out.print(name.charAt(i));}System.out.println();}}}}

当然，其中的out与out1方法都是可以互斥的，

然而如下代码中

public class TraditionalThreadSynchronized {public static void main(String[] args) {new TraditionalThreadSynchronized().init();}public void init() {final Outputer outputer = new Outputer();new Thread(new Runnable() {@Overridepublic void run() {while (true) {try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}outputer.out("bbbbbbbbb");}}}).start();new Thread(new Runnable() {@Overridepublic void run() {while (true) {try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}outputer.out3("aaa");}}}).start();}static class Outputer {public synchronized void out(String name) {int len = name.length();for (int i = 0; i < len; i++) {System.out.print(name.charAt(i));}System.out.println();}public void out1(String name) {int len = name.length();synchronized (Outputer.class) {for (int i = 0; i < len; i++) {System.out.print(name.charAt(i));}System.out.println();}}public synchronized static void out3(String name) {int len = name.length();for (int i = 0; i < len; i++) {System.out.print(name.charAt(i));}System.out.println();}}}

自然，当运行的时候，out与out3两个方法是不能互斥的，而当线程1执行out1、线程2执行out3的时候，那么线程将会可以互斥，

那么怎么使out与out3两个方法也可以互斥呢，并不适用out1的方式？

求高人指点