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The class whose only one object can be created is called Singleton class. Now a days questions on Singleton class have become very common in interviews and other exams. So it is very important for every developer to have knowledge of Singleton class. Features of Singleton class : Only one object can be created of … Read more
In multiple inheritance a single class extends from more than one class. But Java does not support multiple inheritance among classes. Multiple inheritance in Java is possible with Interface. Let us understand with help of diagram about multiple inheritance : Class A is inheriting from class B and class C at the same time. Why … Read more
Constructor chaining is the way through which a constructor make a call to another constructor. Constructor chaining can be done in 2 ways: Output In the above code we called Example2() constructor for object creation which in turn calls Example2(int age) constructor using this(29). Now inside Example2(int age) constructor a call is made to Example2(int … 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