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Arraylist is a dynamic array whose size increases as we add more elements to it. When an ArrayList is created without specifying its size then the size of Arraylist initially is zero. But when we add the first element to the list then size of ArrayList is increased to 10. This can be shown by … Read more
Default constructor is automatically created by the compiler if we do not declare any constructor. The features of default constructor are : Let us look at an example to understand default constructor: Output As you can see in the above code we have not created any constructor in our class TestA, still instance variables age … Read more
Constructor in java is a special function that is used to initialize member variables of a class. Some of the key features of constructors are: To understand the above features in detail we have divided them in few sections :-