采用JDK并发包提供的Lock, Condition等类的相关方法控制多线程.

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package com.yyj.zxy;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.ReentrantLock;public class SanJunFight1 {/** * 三只部队轮流上战场，每只部队在战场上每一轮只能进行10次攻击； * 合计攻击300次则停止攻击； */private static int count = 1; //攻击计数器private static int part = 1;  //默认第一支部队先进行第一次攻击private static int n = 10;private static ReentrantLock lock = new ReentrantLock();private static Condition con1 = lock.newCondition();private static Condition con2 = lock.newCondition();private static  Condition con3 = lock.newCondition();public static void main(String[] args) {    //第一支部队攻击线程；  new Thread(new Runnable() {@Overridepublic void run() {for (int i = 0; i < n; i++) {lock.lock();while(part !=1)try {con1.await();} catch (InterruptedException e) {e.printStackTrace();}for(int j=0;j<n;j++){System.out.print("部队："+part+"进行第"+ count+"次攻击！");int fightTime = 0;fightTime = 1000;System.out.println("攻击"+fightTime/1000+" 秒结束    >>>>>   本次攻击完成" );count ++;}System.out.println();part = 2; //n次攻击后，由部队2进行下一轮攻击con2.signal(); //唤醒等待攻击的部队；}}}).start();  //第2支部队攻击线程；  new Thread(new Runnable() {    @Override  public void run() {  for (int i = 0; i < n; i++) {  lock.lock();  while(part !=2)  try {  con2.await();  } catch (InterruptedException e) {  e.printStackTrace();  }  for(int j=0;j<n;j++){System.out.print("部队："+part+"进行第"+ count+"次攻击！");int fightTime = 0;fightTime = 1000;System.out.println("攻击"+fightTime/1000+" 秒结束    >>>>>   本次攻击完成" );count ++;}  System.out.println();  part = 3; //5次攻击后，由部队3进行下一轮攻击  con3.signal(); //唤醒等待攻击的部队；  }  }  }).start();  //第3支部队攻击线程；  new Thread(new Runnable() {    @Override  public void run() {  for (int i = 0; i < n; i++) {  lock.lock();  while(part !=3)  try {  con3.await();  } catch (InterruptedException e) {  e.printStackTrace();  }  for(int j=0;j<n;j++){System.out.print("部队："+part+"进行第"+ count+"次攻击！");int fightTime = 0;fightTime = 1000;System.out.println("攻击"+fightTime/1000+" 秒结束    >>>>>   本次攻击完成" );count ++;}  System.out.println();  part = 1; //5次攻击后，由部队1进行下一轮攻击  con1.signal(); //唤醒等待攻击的部队；  }  }  }).start();}}
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