Example for interface in java

/*
* Java Interface Examples
/
// Declaring the interface with a method declaration
interface intDemo
{
public void  sayWelcome();

}
 
 // create class and  implements the interface  using the keyword "implements"
public class DemoInterface implements intDemo

{
// defining the methods which is declared in the interface
public void  sayWelcome()
{
System.out.println("Welcome here");
}
public static void main(String[] args)
{
// create object for the class 

DemoInterface demointerface=new DemoInterface(); 
//invoke the sayWelcome() .which is declared in intDemo interface
demointerface.sayWelcome();
}

}

Output:::

Welcome here