Do I need to import java.lang package any time? Why?
No. It is by default loaded internally by the JVM.
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use of wrapper classes?
What is the USE of Null interfaces ??...if thers nothing inside these interfaces how are they used and WHy are they used ???? No 1 has given a proper description yet
Difference between association, composition and aggregation?
Why for each loop is used?
What is the use of arraylist in java?
Is java jre still free?
What is foreach loop in java?
What is the life cycle of Servlet?
Why java is considered dynamic?
What are the main uses of java?
How do we make a class serialize?
What is meant by JVM ?