Set, List and Map are three important interfaces of the Java collection framework, and the difference between Set, List, and Map in Java is one of the most frequently asked Java Collection interview questions. Sometimes this question is asked as When to use List, Set and Map in Java. Clearly, the interviewer is looking to know that whether you are familiar with the fundamentals of the Java collection framework or not. In order to decide when to use List, Set or Map, you need to know what are...

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The Iterator is the standard way to traverse a collection in Java. You can use Iterator to traverse a List, Set, Map, Stack, Queue, or any Collection, but you might not know that there is another way to traverse over List in Java? Yes, it's called the ListIterator. There are many differences between Iterator and ListIterator in Java, but the most significant of them is that Iterator only allows you to traverse in one direction, I mean forward, you have just got a next() method to get the...

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There is no concept of destructor in JAVA. The concept of garbage collection deletes all the variables and functions of the program that’s execution is completed. So all the instance variables are automatically initialized with there zero values at the time of creation of the object, because the memory is cleared by the garbage collection concept. If user wants to delete an object from the memory then the finalize( ) function can be used to perform those type of operation. That means, using...