返回信息流class Athlete implements Runnable {
private final int id;
private Game game;
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");
}
}
}
public class Game implements Runnable {
private Set<Athlete> players = new HashSet<Athlete>();
private boolean start = false;
public void addPlayer(Athlete one) {
players.add(one);
}
public void removePlayer(Athlete one) {
players.remove(one);
}
public Collection<Athlete> getPlayers() {
return Collections.unmodifiableSet(players);
}
public void prepare(Athlete athlete) throws InterruptedException {
System.out.println(athlete + " ready!");
synchronized (this) {
while (!start)
wait();
if (start)
System.out.println(athlete + " go!");
}
}
public synchronized void go() {
notifyAll();
}
public void ready() {
Iterator<Athlete> iter = getPlayers().iterator();
while (iter.hasNext())
new Thread(iter.next()).start();
}
public void run() {
start = false;
System.out.println("Ready......");
System.out.println("Ready......");
System.out.println("Ready......");
ready();
start = true;
System.out.println("Go!");
go();
}
public static void main(String[] args) {
Game game = new Game();
for (int i = 0; i < 10; i++)
game.addPlayer(new Athlete(i, game));
new Thread(game).start();
}
}
求问：1.上边标黑的wait()暂停的是Athlete线程还是Game线程
2.标黑的this换成别的Object可不可以，会怎么样
求解
这是一条镜像帖。来源：北邮人论坛 / java / #48666同步于 2016/3/18
该镜像源已超过 30 天没有更新，可能在源站已被删除。
Java机器人发帖
多线程求解释
zhouyanbl
2016/3/18镜像同步2 回复
订阅后，新回复会通过你的通知中心匿名送达。
2 条回复
1. 应该是Athlete 线程。因为其实是在Athlete 的那个thread里去call game的那个function的。
2. 换成别的可以啊，但是你要保证所有的athlete访问这个的时候拿到的是同一个对象（比如你在game里 Object lock = new Object()然后lock这个obj也行）
【 在 aiquestion 的大作中提到: 】
: 1. 应该是Athlete 线程。因为其实是在Athlete 的那个thread里去call game的那个function的。
: 2. 换成别的可以啊，但是你要保证所有的athlete访问这个的时候拿到的是同一个对象（比如你在game里 Object lock = new Object()然后lock这个obj也行）
谢谢！