Single inheritance in java

 Single inheritance:

• If one base class and one derived class in a program called  “Single inheritance”.

Syntax:

1. class a
   {
             //Base class
   }
   class b: public a
   {
             //Derived class
   }
   Object creation:
   Derived_class_name object_name;
   object_name.function(parameter list);

Example:

1. import java.util.Scanner;

   class emp_data {

       int empno, sal;

       String ename;

       Scanner sc = new Scanner(System.in);

       void get_data() {

           System.out.println("Enter employee id: ");

           empno = sc.nextInt();

           System.out.println("Enter employee name: ");

           ename = sc.next();

           System.out.println("Enter employee salary: ");

           sal = sc.nextInt();

       }

   }

    

   class emp_sal extends emp_data {

       void salary_increment() {

           if (sal <= 5000) {

               sal = sal + 1000;

               System.out.println("Employee salary has been increased by 1000");

           } else if (sal >= 5000 && sal <= 10000) {

               sal = sal + 2000;

               System.out.println("Employee salary has been increased by 2000");

           } else {

               sal = sal + 3000;

               System.out.println("Employee salary has been increased by 3000");

           }

       }

       void display() {

           System.out.println("\nEmployee Details.......");

           System.out.println("Employee ID : " + empno);

           System.out.println("Employee name: " + ename);

           System.out.println("Employee sal: " + sal);

       }

   }

   class Single_inheritance {

       public static void main(String args[]) {

           emp_sal e = new emp_sal();

           e.get_data();

           e.salary_increment();

           e.display();

       }

   }

Output:

If condition:

Else if condition:

Else condition:

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