> For the complete documentation index, see [llms.txt](https://gyansetu-java.gitbook.io/core-java/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gyansetu-java.gitbook.io/core-java/super.md).

# 22) Super Keyword

![](/files/-LUdmEhNlvKHKDqskmyc)

![](/files/-LUdmJaC4PNjvXfuKlzl)

```java
package com.gns.sort;

/* Base class vehicle */
class Vehicle {
	int maxSpeed = 120;
}

/* sub class Car extending vehicle */
class Car extends Vehicle {
	int maxSpeed = 180;

	void display() {
		/* print maxSpeed of base class (vehicle) */
		System.out.println("Maximum Speed: " + super.maxSpeed);
	}
}

/* Driver program to test */
public class Test {
	public static void main(String[] args) {
		Car small = new Car();
		small.display();
	}
}
```

```
Output:
Maximum Speed: 120
In the above example, both base class and subclass have a member maxSpeed. We could access maxSpeed of base class in sublcass using super keyword.
```

![](/files/-LUdmkHN87iS_rQ-l-tx)

```java
package com.gns.sort;

/* Base class Person */
class Person {
	void message() {
		System.out.println("This is person class");
	}
}

/* Subclass Student */
class Student extends Person {
	void message() {
		System.out.println("This is student class");
	}

	// Note that display() is only in Student class
	void display() {
		// will invoke or call current class message() method
		message();

		// will invoke or call parent class message() method
		super.message();
	}
}

/* Driver program to test */
public class Test {
	public static void main(String args[]) {
		Student s = new Student();

		// calling display() of Student
		s.display();
	}
}
```

```
Output:
This is student class
This is person class
```

![](/files/-LUdn4MbCwTHy97iv-FS)

![](/files/-LUdnAK4fwBjuWjhYbLm)

```java
package com.gns.sort;

/* superclass Person */
class Person {
	Person() {
		System.out.println("Person class Constructor");
	}
}

/* subclass Student extending the Person class */
class Student extends Person {
	Student() {
		// invoke or call parent class constructor
		super();

		System.out.println("Student class Constructor");
	}
}

/* Driver program to test */
class Test {
	public static void main(String[] args) {
		Student s = new Student();
	}
}
```

```
Output:
Person class Constructor
Student class Constructor
```

![](/files/-LUdnRotnRife7bcw5Dq)

![](/files/-LUdnWxSOmsGTM_S46qO)

### Example 1:

![](/files/-LUdnzCia0kCnM_Rj4IR)

### Example 2:

![](/files/-LUdo7MBP-LA_q_rmZne)

### Example 3:

![](/files/-LUdoGFjAoDW09X8-zxU)

### Problems :

![](/files/-LUdoUR8bQzQvhLzDt9w)

![](/files/-LUdpRYbr5C_mRvkvaly)