Java – map

How to convert map < object, Object > mapping < string, string > in the cleanest way?

Is there a way not to iterate the map?

thank you

Solution

I think it's a good idea to explain why simple solutions don't work and why you'll never use this

Suppose you can convert map < Object > map < string & gt What do you want to happen from the following code:

Map<Object> m = Something;
m.add("Looks good.");
m.add(new Integer(42));
Map<String> s = (Map<String>)m; // uhuh,no we don't want that.

Now you can use the Bohemian / Chris solution, but you basically destroy the Java type system Don't do this. You don't need the map < string > to contain an integer! Interesting later debugging - the additional code that loops through all variables will avoid a lot of headaches, almost not a performance issue.

If there is reason to claim that the map takes objects instead of strings, someone may add any objects - usually you should be able to avoid this better generalization