First we will know in which scenario we use super keyword. When the super class property and sub class property is exactly same then in that context to access super class property, we use super keyword.

The keyword super that can be used to access super class variable as super.variable

The keyword super that can be used to access super class method as super.method();

The keyword super that can be used to access super class constructor as super();

To access super class variable:

InheritanceExample3.java

package com.inheritance;
class A //A : Super class
{
	int x=100;
}
class B extends A //B : Sub class
{
	int x=200;
	void get()
	{
		System.out.println("x="+super.x);
		System.out.println("x="+x);
	}
}
	public class InheritanceExample3
	{
		public static void main(String[] args)
	{
		B obj=new B();
		obj.get();
	}
}

Output
x=100
x=200

To access super class method:

InheritanceExample4.java

package com.inheritance;
class Vehicle
{
	void journey()
	{
		System.out.println("Journey by Vehicle");
	}
}
class Car extends Vehicle
{
	void journey() //Method Overridding
	{
		super.journey();
		System.out.println("Journey by Car");
	}
}
public class InheritanceExample4 {
	public static void main(String[] args)
	{
		Car c=new Car();
		c.journey();
	}
}

output:
Journey by Vehicle
Journey by Car

To access super class constructor:

InheritanceExample5.java

package com.inheritance;
class Parent
{
	Parent()
	{
		System.out.println("super class constructor");
	}	
}
class Child extends Parent
{
	Child()
	{
		super(); //To access super class constructor
		System.out.println("sub class constructor");
	}
}
public class InheritanceExample5 {
	public static void main(String[] args)
	{
		Child obj=new Child();
	}
}

output
super class constructor
sub class constructor