一、卖电影票
public class Main {public static void main(String[] args) {//创建线程对象 Ticket t1=new Ticket("电影院一：");Ticket t2=new Ticket("电影院二：");t1.start();t2.start();}
}import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;public class Ticket extends Thread{//1000张电影票private static int count=100;public Ticket(){}public Ticket(String name){super(name);}//创建一个锁private static Lock lock=new ReentrantLock();@Overridepublic void run() {while(true){//上锁lock.lock();try {if(count==0){System.out.println("电影票卖完了");break;}else {Thread.sleep(30);count--;System.out.println(this.getName()+"卖了一张票，还剩下"+count+"张票");}} catch (InterruptedException e) {throw new RuntimeException(e);} finally {//解锁lock.unlock();}}}
}
二、送礼物
public class Main {public static void main(String[] args) {//创建线程对象Ticket t1=new Ticket("小明");Ticket t2=new Ticket("小张");t1.start();t2.start();}
}import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;public class Ticket extends Thread{//100张电影票private static int count=100;public Ticket(){}public Ticket(String name){super(name);}//创建一个锁private static Lock lock=new ReentrantLock();@Overridepublic void run() {while(true){//上锁lock.lock();try {if(count<=10){System.out.println("不送啦");break;}else {Thread.sleep(30);count--;System.out.println(this.getName()+"送出一个礼物，还剩下"+count+"个礼物");}} catch (InterruptedException e) {throw new RuntimeException(e);} finally {//解锁lock.unlock();}}}
}
三、打印奇数数字
public class Main {public static void main(String[] args) {//创建线程对象Ticket t1=new Ticket("计数器1：");Ticket t2=new Ticket("计数器2：");t1.start();t2.start();}
}import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;public class Ticket extends Thread{//100张电影票private static int count=1;public Ticket(){}public Ticket(String name){super(name);}//创建一个锁private static Lock lock=new ReentrantLock();@Overridepublic void run() {while(true){//上锁lock.lock();try {if(count>100){//超出100则停止break;}else {//未超出100，则继续Thread.sleep(10);if(IsJIShu(count))System.out.println(this.getName()+count+"是奇数");count++;}} catch (InterruptedException e) {throw new RuntimeException(e);} finally {//解锁lock.unlock();}}}public static boolean IsJIShu(int number){//判断奇数int count=0;for(int i=1;i<=Math.sqrt(number);i++){if((number%i)==0)count++;}if(count==1)return true;return false;}
}
四、抢红包
public class Main {public static void main(String[] args) {//创建线程对象Player p1=new Player("玩家一");Player p2=new Player("玩家二");Player p3=new Player("玩家三");Player p4=new Player("玩家四");Player p5=new Player("玩家五");p1.start();p2.start();p3.start();p4.start();p5.start();}
}import java.util.Random;public class Player extends Thread{private String name;public static int Money=100;public static int count=3;public Player(){}public Player(String name){this.name = name;}@Overridepublic void run() {synchronized (Player.class){if (count > 0) {count--;Random r = new Random();if(count!=0){int mon = r.nextInt(Money) + 1;Money -= mon;System.out.println(this.name + "抢到了" + mon + "元红包");}else{int mon=Money;System.out.println(this.name + "抢到了" + mon + "元红包");}} else {System.out.println(this.name + "没有抢到红包");}}}
}
五、抽奖箱抽奖
public class Main {public static void main(String[] args) {//创建线程对象Box box=new Box();Thread thread1=new Thread(box,"抽奖箱1");Thread thread2=new Thread(box,"抽奖箱2");thread2.start();thread1.start();}
}import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;public class Box implements Runnable {private static Lock lock=new ReentrantLock();private static ArrayList<Integer> list=new ArrayList<>();//静态代码块static {Collections.addAll(list,10,5,20,50,100,200,500,800,2,80,300,700);}@Overridepublic void run() {if(!list.isEmpty()){Thread thread=Thread.currentThread();while (true) {try {lock.lock();if (!list.isEmpty()) {int count = list.size();Random r = new Random();int index = r.nextInt(count);System.out.println(index);System.out.println(list.size());System.out.println(thread.getName() + "又产生了一个" + list.get(index) + "元大奖");list.remove(index);} else {break;}} catch (Exception e) {throw new RuntimeException(e);} finally {lock.unlock();}}}}
}
六、抽奖箱进阶一
public class Main {public static void main(String[] args) {//创建线程对象Box box1=new Box("抽奖箱一");Box box2=new Box("抽奖箱二");box2.start();box1.start();}
}import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;public class Box extends Thread{private static Lock lock=new ReentrantLock();private static ArrayList<Integer> list=new ArrayList<>();private String name;private int big=0;private int sum=0;public Box(){}public Box(String name){this.name=name;}private ArrayList<Integer> ownlist=new ArrayList<>();//静态代码块static {Collections.addAll(list,10,5,20,50,100,200,500,800,2,80,300,700);}@Overridepublic void run() {if(!list.isEmpty()){Thread thread=Thread.currentThread();while (true) {try {lock.lock();if (!list.isEmpty()) {int count = list.size();Random r = new Random();int index = r.nextInt(count);//将抽奖结果存入集合中，等最后打印this.ownlist.add(list.get(index));sum+=list.get(index);//当 big小于当前的抽奖结果时，将其赋值给bigthis.big=this.big<list.get(index)?list.get(index):this.big;// System.out.println(thread.getName() + "又产生了一个" + list.get(index) + "元大奖");list.remove(index);} else {System.out.println("此次抽奖过程中，"+this.name+"总共产生了"+this.ownlist.size()+"个奖项");System.out.print("分别为：");for (Integer integer : this.ownlist) {System.out.print(" "+integer+",");}System.out.println("最高奖项为"+this.big+",总计为 "+this.sum+" 元");break;}} catch (Exception e) {throw new RuntimeException(e);} finally {lock.unlock();}}}}
}
七、抽奖箱进阶二
public class Main {public static void main(String[] args) {//创建线程对象Box box1=new Box("抽奖箱一");Box box2=new Box("抽奖箱二");box2.start();box1.start();}
}import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;public class Box extends Thread{private static Lock lock=new ReentrantLock();private static ArrayList<Integer> list=new ArrayList<>();private static int count=0;private static ArrayList<String> biglist=new ArrayList<>();private String name;private int big=0;private int sum=0;public Box(){}public Box(String name){this.name=name;}private ArrayList<Integer> ownlist=new ArrayList<>();//静态代码块static {Collections.addAll(list,10,5,20,50,100,200,500,800,2,80,300,700);}@Overridepublic void run() {if(!list.isEmpty()){Thread thread=Thread.currentThread();while (true) {try {lock.lock();if (!list.isEmpty()) {int count = list.size();Random r = new Random();int index = r.nextInt(count);//将抽奖结果存入集合中，等最后打印this.ownlist.add(list.get(index));sum+=list.get(index);//当 big小于当前的抽奖结果时，将其赋值给bigthis.big=this.big<list.get(index)?list.get(index):this.big;// System.out.println(thread.getName() + "又产生了一个" + list.get(index) + "元大奖");list.remove(index);Thread.yield();} else {System.out.println("此次抽奖过程中，"+this.name+"总共产生了"+this.ownlist.size()+"个奖项");System.out.print("分别为：");for (Integer integer : this.ownlist) {System.out.print(" "+integer+",");}System.out.println("最高奖项为"+this.big+",总计为 "+this.sum+" 元");count++;biglist.add(this.name+","+this.big);break;}} catch (Exception e) {throw new RuntimeException(e);} finally {lock.unlock();}}if(count==2){if(Integer.parseInt(biglist.get(0).split(",")[1])>Integer.parseInt(biglist.get(1).split(",")[1])){System.out.println("在此次抽奖过程中,"+biglist.get(0).split(",")[0]+"产生了最大奖项，金额为"+Integer.parseInt(biglist.get(0).split(",")[1])+"元");}else{System.out.println("在此次抽奖过程中,"+biglist.get(1).split(",")[0]+"产生了最大奖项，金额为"+Integer.parseInt(biglist.get(1).split(",")[1])+"元");}}}}
}
另一种方法：
原理：
每个线程的run方法只会执行一次，run方法中的方法体，会在线程争夺到CPU使用权后进行。
