Question

I am using a TreeMap<Integer,Object>() to store values.
Now my Object has a component, Object.value(), which keeps getting incremented as per values read from a file.
So, I evaluate whether the key exists and need to update value.
I do not understand how I can update values in a Map in Java.
I cannot just replace the whole record, as new values need to be added to the existing record value.
Is there a better way to do this than using a map? I used a map because I will keep searching for the keys.
Any suggestions?

Answer 1

Well using a map is correct if you want to be able to quickly access your key-value pairs. If you’re values are just MyObjects with a .value(), can’t you get the object and reset that value?

MyObject myObj = treeMap.get(key);
myObj.setValue(myObj.getValue()++);

I’m using MyObject here as the poster was using Object to denote an example type.