JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java Constructor Chaining Examples

Calling another constructor in the same class from another constructor is called constructor chaining. By using this() we can call another constructor in the same class. Incase we want to call another constructor, this() should be the first line in the constructor. Below example shows code for constructor chaining.

Java Constructor Chaining Sample Code

Code:
package com.myjava.constructors;

public class MyChaining {
    
    public MyChaining(){
        System.out.println("In default constructor...");
    }
    public MyChaining(int i){
        this();
        System.out.println("In single parameter constructor...");
    }
    public MyChaining(int i,int j){
        this(j);
        System.out.println("In double parameter constructor...");
    }
    
    public static void main(String a[]){
        MyChaining ch = new MyChaining(10,20);
    }
}

Example Output

In default constructor...
In single parameter constructor...
In double parameter constructor...

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Knowledge Center
Interface and its usage
Interface is similar to a class which may contain method's signature only but not bodies and it is a formal set of method and constant declarations that must be defined by the class that implements it. Interfaces are useful for declaring methods that one or more classes are expected to implement, capturing similarities between unrelated classes without forcing a class relationship and determining an object's programming interface without revealing the actual body of the class.

About Author

My name is 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 at java2novice@gmail.com or you can comment on the page.

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Reference: Java™ Platform Standard Ed. 6 - API Specification | Java is registered trademark of Oracle.
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