JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

Publish Your Article Here

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
ServletOuptputStream Vs PrintWriter
ServletOutputStream: ServletResponse.getOutputStream() returns a ServletOutputStream suitable for writing binary data in the response. The servlet container does not encode the binary data, it sends the raw data as it is.

PrintWriter: ServletResponse.getWriter() returns PrintWriter object which sends character text to the client. The PrintWriter uses the character encoding returned by getCharacterEncoding(). If the response's character encoding has not been specified then it does default character encoding.
Famous Quotations
Millions long for immortality who do not know what to do with themselves on a rainy Sunday afternoon.
-- Susan Erz

About Author

Most Visited Pages

Other Interesting Sites

Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
Privacy Policy | Copyright © 2017 by Nataraja Gootooru. All Rights Reserved.