How can i convert an object to an int in Java?

Question

I'm working in Java and I would like to convert an Object to an int.

I do:

   Collection c = MyHashMap.values(); 
   Object f = Collections.max(c);
   int NumOfMaxValues = Integer.parseInt(f);

But it's not working. It says: No suitable method for parseInt.

How can I fix that?

Answer 1

Integer.parseInt()

expects a String. You can use

Integer.parseInt(f.toString())

and override the toString() method in your class.

Answer 2

Ideally, you should use generics to your advantage and have something along the lines of the below:

Map<Object,Integer> myHashMap = new HashMap<Object,Integer>();
Collection<Integer> values = myHashMap.values();
Integer value = Collections.max(values);
if (value != null)
{
  int myInt = value;
}