Java program using interface YASH PAL, 31 July 2024 In this tutorial, we are going to write a Java program using the interface in Java Programming with practical program code and step-by-step full complete explanation. Java program using the interface. public interface Speaker { public void speak(); } public class Lecturer implements Speaker { public void speak() { System.out.println("Lecturer view"); } } public class Politician implements Speaker { public void speak() { System.out.println("Politician view"); } } public class Test { public static void main(String arr[]) { Speaker sp=null; System.out.println("sp point to politician"); sp=new Politician(); sp.speak(); System.out.println("sp point to Lecturer"); sp=new Lecturer(); sp.speak(); } } Output sp point to politician Politician view sp point to Lecturer Lecturer view coding problems java