Polymorphism in Java

Polymorphism in Java

• 1.
  Polymorphism in Java W WW . J A V A 2 B L O G . C O M
• 2.
  Content Introduction Method Overloading Method Overriding
• 3.
  Introduction When one taskis performed by different ways is known as polymorphism. In java, we can achieve Polymorphism by: Method Overloading Method Overriding
• 4.
  Method Overloading In methodoverloading, a class has multiple methods with same name but different parameters. we can achieve method overloading by changing parameter types or by changing the number of parameters. Method overloading increases the readability of the program.
• 5.
  Method Overloading class Addition { intsum; void sum(int a, int b) { sum=a+b; System.out.println("Sum is:" + sum); } void sum(int a, int b, int c) { sum=a+b+c; System.out.println("Sum is:" + sum); } }
• 6.
  Method Overloading class Demo { publicstatic void main(String args[]) { Addition obj=new Addition(); obj.sum(10,12); obj.sum(16, 19,30); } }
• 7.
  Method Overriding In methodoverriding, super class and sub class having methods with same name and same parameters but having different implementations. It is mainly used to provide the specific implementation of a method which is already defined in its super class. It is used to achieve run-time polymorphism.
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  Method Overriding class Super { voiddisplay() { System.out.println("I am super class"); } }
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  Method Overriding class Subextends Super { void display() { System.out.println("I am sub class"); } public static void main(String args[]) { Sub obj=new Sub(); obj.display(); } }
• 10.
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