What is the difference between hashmap and hashtable? What is an interface?
What are nested classes in java?
Definition for connection pooling?
What is hashtable and explain features of hashtable?
I have a string like _a01_a02_a03_ and another string like _2_1.5_4_ as input.I want to extract a01,a02... to a string array and 2,1.5,etc to a double array with a01 corresponds to 2 and a02 to 1.5 etc. Need code in core java.. Can you do it?
Can we override tostring method in java?
To obtain design information about an object, which class in used?
When should I use singleton pattern?
What do you know about the garbage collector in java?
What is collection sort in java?
Describe the term diamond problem.
What comes to mind when someone mentions a shallow copy in java?
difference between vectorlist and hash