Is singleton thread safe in java?
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why the equals method can be override?when we override the equals method?
How many types of java are there?
Is hashset ordered java?
How will you communicate between two applets?
What is an immutable object? How do you create one in java?
Can abstract class have private constructor?
What is difference between hashset and hashmap?
What are multiple inheritances? Is it supported by java?
Is nan false?
In java, how many ways you can take input from the console?
What is a function in programming?
What is the major advantage of external iteration over internal iteration?