What is map and hashmap in java?
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What do you mean by of string::valueof expression in java 8?
Which package has light weight components in java programming?
In collection sorting comparable and comparator interface will be used..but why this two interfaces required..two will work same purpose so why there are two interfaces instead of one?when to use comparator and when to use comparable?
What are the two types of exceptions in java? Which are the differences between them?
How GUI component handle its own events?
Is object a data type?
Explain thread life cycle in java?
How does JAVA ClassLoader work?
What is the purpose of encapsulation?
Difference between process and thread?
when,where and how to use abstract class and interface
How can you traverse a linked list in java?