1700450889
1700450890
Thread.sleep(2000);
1700450891
1700450892
}catch(Exception e){
1700450893
1700450894
//异常处理
1700450895
1700450896
}
1700450897
1700450898
StringBuffer sb=new StringBuffer();
1700450899
1700450900
//线程名称
1700450901
1700450902
sb.append(“线程名称:”+Thread.currentThread().getName());
1700450903
1700450904
//运行的时间戳
1700450905
1700450906
sb.append(”,执行时间:”+Calendar.getInstance().get(13)+“s”);
1700450907
1700450908
System.out.println(sb);
1700450909
1700450910
}
1700450911
1700450912
}
1700450913
1700450914
该类模拟了一个执行时间比较长的计算,注意这里使用的是模拟方式,在使用sleep方法时线程的状态会从运行状态转变为等待状态。该任务要具备多线程能力时必须实现Runnable接口,我们分别建立两种不同的锁实现机制,首先看显式锁实现:
1700450915
1700450916
//显式锁任务
1700450917
1700450918
class TaskWithLock extends Task implements Runnable{
1700450919
1700450920
//声明显式锁
1700450921
1700450922
private fnal Lock lock=new ReentrantLock();
1700450923
1700450924
@Override
1700450925
1700450926
public void run(){
1700450927
1700450928
try{
1700450929
1700450930
//开始锁定
1700450931
1700450932
lock.lock();
1700450933
1700450934
doSomething();
1700450935
1700450936
}finally{
1700450937
1700450938
//释放锁
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