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HorseRace.java
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114 lines (103 loc) · 2.68 KB
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package Thread.concurrent;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
/*
* 用cylicbarrier模拟赛马
*
* */
public class HorseRace {
private final int FINSH_LINE=75;
private List<Horse> lists=new ArrayList<Horse>();
ExecutorService service=Executors.newCachedThreadPool();
public HorseRace(int nHorses){
CyclicBarrier cyclicBarrier=new CyclicBarrier(nHorses,new Runnable() {
@Override
public void run() {
//打印赛场的栅栏
StringBuilder stringBuilder=new StringBuilder();
for (int i = 0; i <FINSH_LINE; i++) {
stringBuilder.append("=");
}
System.out.println(stringBuilder.toString());
for(Horse horse:lists){
System.out.println(horse.tracks());
}
for(Horse horse:lists){
if(horse.getStraides()>=FINSH_LINE){
System.out.println(horse+"won!!!!!!!!!!!!!!");
//停止所有的线程
service.shutdownNow();
//安全结束
return;
}
}
try {
TimeUnit.MICROSECONDS.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
System.out.println("barrierACtion sleep isInterrupted");
}
}
});
for (int i = 0; i < nHorses; i++) {
Horse horse=new Horse(cyclicBarrier);
lists.add(horse);
service.execute(horse);
}
}
public static void main(String[] args) {
new HorseRace(5);
}
}
class Horse implements Runnable{
private static CyclicBarrier cyclicBarrier;
private static int count=0;
private final int id=count++;
private Random random=new Random(47);
//马的步伐长
private int straid=0;
public Horse(CyclicBarrier barrier){
cyclicBarrier=barrier;
}
@Override
public void run() {
while(!Thread.interrupted()){
try {
synchronized (this) {
//让马随机跑这么多步数0-10之间的步数
int rand=random.nextInt(10);
straid+=rand;
//System.out.println(rand);
}
//阻塞住，直到所有马线程完成
cyclicBarrier.await();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (BrokenBarrierException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public String toString(){
return "Horse"+id;
}
public synchronized int getStraides(){
return this.straid;
}
//打印马的轨迹路径
public String tracks(){
StringBuilder s=new StringBuilder();
for (int i = 0; i < straid; i++) {
s.append("*");
}
return s.toString();
}
}