thread wait notify

Athlete.java

package thread_multy.demo_wait_notify_01;class Athlete implements Runnable{private final int id;private Game game;/** * 选手 *  * @param id 编号 * @param game 比赛 */public Athlete(int id, Game game){this.id = id;this.game = game;}public boolean equals(Object o){if (!(o instanceof Athlete)){return false;}Athlete athlete = (Athlete) o;return id == athlete.id;}public String toString(){return "Athlete<" + id + ">";}public int hashCode(){return new Integer(id).hashCode();}public void run(){try{game.prepare(this);}catch (InterruptedException e){System.out.println(this + " quit the game");}}}

Game.java

package thread_multy.demo_wait_notify_01;import java.util.Collection;import java.util.Collections;import java.util.HashSet;import java.util.Iterator;import java.util.Set;/** * 模拟线程之间的协作。Game类有2个同步方法prepare()和go()。 * 标志位start用于判断当前线程是否需要wait()。 * Game类的实例首先启动所有的Athele类实例，使其进入wait()状态， * 在一段时间后，改变标志位并notifyAll()所有处于wait状态的Athele线程。 *  *  * @author Administrator * */public class Game implements Runnable{private Set<Athlete> players = new HashSet<Athlete>();private boolean start = false;/** *  * @param one */public void addPlayer(Athlete one){players.add(one);}public void removePlayer(Athlete one){players.remove(one);}/** * 2 */public void run(){start = false;System.out.println("Ready......");System.out.println("Ready......");System.out.println("Ready......");ready();//预备start = true;System.out.println("Go!");go();//跑}/** * 3 */public void ready(){Iterator<Athlete> iter = getPlayers().iterator();while (iter.hasNext()){new Thread(iter.next()).start();}}/** * 4 *  * @return */public Collection<Athlete> getPlayers(){return Collections.unmodifiableSet(players);}/** * synchronized method *  * @param athlete * @throws InterruptedException */public void prepare(Athlete athlete) throws InterruptedException{System.out.println(athlete + " ready!");synchronized (this){while (!start){wait();}if (start){System.out.println(athlete + " go!");}}}/** * synchronized method */public synchronized void go(){notifyAll();}/** * 测试 *  * @param args */public static void main(String[] args){Game game = new Game();// 比赛参加选手 0 1 2 3 4 5 6 7 8 9  10个人for (int i = 0; i < 10; i++){//game.addPlayer(new Athlete(i, game));}new Thread(game).start();}}