nest « HashMap « Java Collection Q&A

1. Accessing nested HashMaps in Java    stackoverflow.com

I have a HashMap in Java, the contents of which (as you all probably know) can be accessed by

HashMap.get("keyname");

2. nested hashmaps of unknown depth java    stackoverflow.com

I have a requirement in which I need to have an nested hashmap. But the depth would be decided at run time. E.g. If at runtime, user says 3, then my hashmap should ...

3. How to use nested HashMap?    coderanch.com

I have a situation where I'd like to be able to enter two string keys and get back an integer value. I've tried doing this with a nested HashMap, but it really doesn't work the way I was doing it. I was trying to create the nested entry in hash maps like this: this.mapUserNames.put("Fred",mapUserType.put("User",1)); // 1 is perm. Is there a ...

4. issue with passing values to a nested hashmap    forums.oracle.com

There's only one instance of map2. You keep changing what's in map2 and storing the same reference to map2 in various places in map1. In the end, when you're iterating over map1 you're getting the same map2 reference on each item of course, so naturally they all have the same value. That value is the last one you set for the ...

5. How to retrieve values from nested hashmap?    forums.oracle.com

Hi, I am calling a Single view function, which returns a nested hash (hash map) structure. Please help me with how to retrieve values from nested hashmap. I have tried with below sample. HashMap hashMap = new HashMap(); HashMap hashMap1 = new HashMap(); HashMap hashMap2 = new HashMap(); hashMap.put( "One", new Integer(1) ); hashMap.put( "Two", new Integer(2) ); hashMap.put( "Three", new ...

6. How to get values from a nested hashmap?    forums.oracle.com