Interface in Java

Interface in Java:

In Java, the interface is an abstract type. It is used to specify an interface that classes must implement. Interfaces are declared using the “interface” keyword. It may contain method signature and constant declarations. It never contains methods definitions. Interfaces are implemented, rather than instantiated.

Interface usage in Java:

• In Java, class never supports multiple inheritance whereas interface supports multiple inheritance.
• When the programmer develops a project then it is advisable that the programmer should declare an interface. When the programmer declares an interface then it becomes easier to modify and add new features in the projects as nothing is defined in an interface.

interface In 
{
	void show();
	void display();
}

public class Interface {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		In in = new In()
		 {
			public void show() 
			{
				
				System.out.println("Hello Gk Scientist");
			}
			
			public void display() 
			{
				
				System.out.println("Today we learn about Interface in Java");
			}
			
		};
		
		in.show();
		in.display();
	}

}