Java Hashmap Iterator Issue on conditon

Question

I am trying to loop through a hashmap which contains Sessions and IDs. Multiple sessions may have the same ID. On each method call, I need to iterate through the hashmap and find which sessions are listed against a given ID.

class contains:

private static Map<Session, String> peers = new HashMap<Session, String>    ();

Method contains:

for (Map.Entry<Session, String> entry : peers.entrySet()) {
                if(entry.getValue() == clientId){
                    Session peer = entry.getKey();
                    peer.getBasicRemote().sendObject(figure);
                   }
            }

But the problem is it runs only one time. Even I tried to get the size of hashmap and it given the exactly amount what I have.

You should compare strings with equals if(entry.getValue().equals(clientId)){ — assylias
– assylias, Commented Mar 25, 2015 at 18:37

Florian Schaetz · Accepted Answer · 2015-03-25 18:37:24Z

1

As the value is a String, you should probably compare it via equals(), as == only checks if two objects are the same object, but not if they are the same String. But that's only guessing.

answered Mar 25, 2015 at 18:37

Florian Schaetz

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