What is the base class in java from which all classes are derived?
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What is mutable object and immutable object?
What is difference between local variable and global variable?
I have a Arraylist object, it has duplecate values also. Now question is i want delete duplecate data in that objet with out using Set?
How to override equals() and hashCode() method in java?
Why is it called a string?
What is the use of singleton class?
What is a J2EE component? List out all the component?
What is the common usage of serialization?
why doesn't java run on all platforms?
Explain differences between checked and unchecked exceptions in java?
Which variables are stored in heap?
What is remote method invocation (rmi)?