JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java Constructor Examples

  • Constructors are required to create objects for a class. Constructors are used to initialize the instance variables of an object.
  • Constructor declaration looks like method declaration. It must have the same name as that of the class and have no return type.
  • Constructors can be classified into two types, default constructors and parametarized constructors.
  • If you don't define a constructor, then the compiler creates a default constructor. Default constructors do not contain any parameters. Default constructors are created only if there are no constructors defined by us.
  • Prametarized constructors are required to pass parameters on creation of objects. We can overload constructors with different datatypes as its parameters.
  • Use 'this()' to communicate from one constructor to another constructor in the same class.
  • Use 'super()' to communicate with super class constructor.

Java Constructor Sample Code Examples

Knowledge Centre
Difference between while and do-while
The while statement verifies the condition before entering into the loop to see whether the next loop iteration should occur or not. The do-while statement executes the first iteration without checking the condition, it verifies the condition after finishing each iteration. The do-while statement will always execute the body of a loop at least once.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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