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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

package com.myjava.constructors;

public class MyChaining {
    public MyChaining(){
        System.out.println("In default constructor...");
    public MyChaining(int i){
        System.out.println("In single parameter constructor...");
    public MyChaining(int i,int 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...

Other Constructor Examples

Knowledge Centre
Default value of a local variables?
The local variables are not initialized to any default values. We should not use local variables with out initialization. Even the java compiler throws error.
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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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