Java Program to Show Inherited Constructor Calls Parent Constructor By Default
Last Updated : 28 Jan, 2022
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In java, there exists a very important keyword known as super() keyword in java which is widely used in java being object-oriented and hence inheritance comes into play. So whenever we use super keyword inside a child constructor then it calls the default parent constructor by itself.
Example 1
// Java Program to Demonstrate Inherited constructor
// calls the parent constructor by default
// Class 1
// Main class
class GFG {
public static void main(String[] a)
{
// Inherited constructor calling
new child();
new parent();
}
}
// Class 2
// Parent class - Helper class
class parent {
// Constructor of parent class
parent()
{
System.out.println("I am parent class constructor");
}
}
// Class 3
// Child class - Helper class
class child extends parent {
// Constructor of child class
child()
{
System.out.println("I am child class constructor");
}
}
Output
I am parent class constructor I am child class constructor I am parent class constructor
Example 2
// Java Program to Demonstrate Inherited constructor
// calls the parent constructor by default
// Class 1
// Main class
class GFG {
// Main driver method
public static void main(String[] a)
{
// Inherited constructor calling
new child();
new child(100);
}
}
// Class 2
// Parent class (Helper class)
class parent {
// Constructor of parent class
parent()
{
// Print statement
System.out.println("I am parent class constructor");
}
}
// Class 3
// Child class (Helper class)
class child extends parent {
// Constructor 1
// Constructor of child class
child()
{
// Print statement
System.out.println("I am child class constructor");
}
// Constructor 2
// Constructor of child class
child(int x)
{
// Print statement
System.out.println(
"I am param child class constructor");
}
}
Output
I am parent class constructor I am child class constructor I am parent class constructor I am param child class constructor
