假设我有这样的课程:
public class Server {
public static void main(String[] args) {
Map<Integer, ServerThread> registry = Collections.synchronizedMap(new LinkedHashMap<Integer, ServerThread>());
...
while(true) {
Socket socket = serverSocket.accept();
ServerThread serverThread = new ServerThread(id, registry);
registry.put(id, serverThread);
}
}
}
然后:
public class ServerThread extends Thread {
private Map<Integer, ServerThread> registry;
private int id;
public ServerThread(int id, Map<Integer, ServerThread> registry) {
this.id = id;
this.registry = registry;
}
...
private void notify() {
synchronized(registry) {
for(ServerThread serverThread : registry.values()) {
serverThread.callSomePublicMethodOnThread();
}
}
}
}
我只是想确保registry
在迭代它时不会对其进行修改。将其设为同步地图是否可以保证这种行为?还是我需要synchronized
声明。同步语句的行为会像我期望的那样吗?
谢谢