What is the life-cycle of an object?
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The life cycle of an object starts with instantiation and ends with garbage collection
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Object creation
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The operator new allocates storage in the heap and invokes a constructor method for initialization of the object.
Object deletion
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The Java garbage collector runs in parallel (as a thread) with the executing program, so garbage collection is in some sense continuous in Java. A class can have a finalize method that is to be invoked (automatically) before deleting an object. This is useful in case there are any resources, such as an open file, that need to be released by the object before it is removed from the system.
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Core Java 
