Cast « HashMap « Java Collection Q&A

1. Casting a Object to HashMap    stackoverflow.com

I'm having trouble working out how to count instances of Values in a HashMap. I have seen that there is methods attached to the Object class that look as if they are ...

2. ClassCastException When Casting HashMap Iterator to a Concrete Type    stackoverflow.com

I am very new to processing.org and Java. I am trying to store objects in a HashMap, and then iterate over the values of the HashMap, calling methods on the stored ...

3. Retrieving an iterator for a HashMap throws a cast exception    stackoverflow.com

I have some relatively simple code I have made that is supposed to retrieve an iterator to a HashMap & print out the key pair values. My problem is that when I ...

4. how to cast object to double type array in java?    stackoverflow.com

OK so what if i have a method like:

Object[] myTest(int[] a, double[] b){
   return new Object[]{a,b};
}

5. How do I cast a HashMap to a concrete class?    stackoverflow.com

I have a class, lets call it Fruit, and I have a HashMap. I want to be able to initialize a new instance of Fruit, but set to the values in ...

6. Why do values of collected HashMap have to be cast while values of parent Map don't? RESOLVED    coderanch.com

7. How to cast an Object to a HashMap with out getting unchecked cast warning    coderanch.com

8. how to cast a HashMap to HashMap?    forums.oracle.com

Does anyone knows how to cast a HashMap to HashMap? The code always get "uses unchecked or unsafe operations", as the session.getAttribute return only a HashMap not HashMap. However, if not using the HashMap , it also raise the "uses unchecked or unsafe operations" warning. HashMap hmpUnreportedDetail = new HashMap(); hmpUnreportedDetail = (HashMap)session.getAttribute("UnreportedDetailObjects"); Thanks!