// interface interface Animal { public void animalSound(); // interface method (does not have a body) public void sleep(); // interface method (does not have a body) } // Pig "implements" the Animal interface class Pig implements Animal { public void animalSound() { // The body of animalSound() is provided here System.out.println("The pig says: wee wee"); } public void sleep() { // The body of sleep() is provided here System.out.println("Zzz"); } } class MyMainClass { public static void main(String[] args) { Pig myPig = new Pig(); // Create a Pig object myPig.animalSound(); myPig.sleep(); } }

interface FirstInterface { public void myMethod(); // interface method } interface SecondInterface { public void myOtherMethod(); // interface method } // DemoClass "implements" FirstInterface and SecondInterface class DemoClass implements FirstInterface, SecondInterface { public void myMethod() { System.out.println("Some text.."); } public void myOtherMethod() { System.out.println("Some other text..."); } } class MyMainClass { public static void main(String[] args) { DemoClass myObj = new DemoClass(); myObj.myMethod(); myObj.myOtherMethod(); } }