JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java Default Constructor Examples

  • Default constructor refers to a constructor that is automatically created by compiler in the absence of explicit constructors.
  • You can also call a constructor without parameters as default constructor because all of its class instance variables are set to default values.

Java Default Constructor Sample Code

Code:
package com.myjava.constructors;

public class MyDefaultConstructor {
    
    public MyDefaultConstructor(){
        System.out.println("I am inside default constructor...");
    }
    
    public static void main(String a[]){
        MyDefaultConstructor mdc = new MyDefaultConstructor();
    }
}

Example Output

I am inside default constructor...

Other Constructor Examples

Knowledge Centre
What is adapter class?
An adapter class provides the default implementation of all methods in an event listener interface. Adapter classes are very useful when you want to process only few of the events that are handled by a particular event listener interface. You can define a new class by extending one of the adapter classes and implement only those events relevant to you.
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The greatest obstacle to discovery is not ignorance; it is the illusion of knowledge.
-- Daniel J. Boorstin

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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