In this example we shall show you how to call the superclass constructor in a default class constructor. An easy way to call a superclass constructor in a class constructor is to create a class that extends another class, as shown below:
- We have created a class
Athat has a default constructor without fields. - We have also created class
InheritConstructor, that extendsAand has a methodvoid function(). - We create a new instance of
InheritCosntructorand call itsfunction()method. - First the constructor or superclass
Ais called and then thefunction()method is called,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
public class InheritConstructor extends A {
public static void main(String[] c) {
new InheritConstructor().function();
}
public void function() {
System.out.println("In InheritConstructor::function");
}
}
// This is the class that we extend.
class A {
A() {
System.out.println("In A::<init>");
}
}
Output:
In A::<init>
In InheritConstructor::function
This was an example of how to call the superclass constructor in a default class constructor in Java.
