Simple Java Interface Code Examples

//HERE IN THIS CODE WE IMPLEMENT AN INTERFACE JAVA CODE FOR FACTORIAL AND EVENODD NUMBER CHECK ...

\===============SO THE CODE IS GIVEN BELOW======================

//The first interface in myfirstpr "package"---

package myfirstpr;

public interface I1 {

void fact(int num);

}

//The second interface in myfirstpr "package"---

package myfirstpr;

public interface I2 {

void evenodd(int num);

}

//making new class of "imp" name to implement the interface,you can choose any name of the class ,here you can see the the over-riding concept of the interface--

package myfirstpr;

public class imp implements I1, I2 {

@Override

public void evenodd(int num) {

if(num%2==0) {

System.out.println("The number is even "+num);

}

else {

System.out.println("The number is odd "+num);

}

}

@override

public void fact(int num) {

int fact1=1;

for(int i=1;i<=num;i++) {

fact1=fact1*i;

}

System.out.println("factorial is "+fact1);

}

public static void main(String args[]) {

imp ob = new imp();

ob.fact(10);

ob.evenodd(232);

}

}

//OUTPUT :

factorial is 3628800

The number is even 232

//here the methods like void fact and even odd are given by overriding and the body part means the logic part is written by us.

package myfirstpr;

public interface I1 {
    void fact(int num);

}

//next interface I2
package myfirstpr;

public interface I2 {
    void evenodd(int num);

}

//implementation in new class 

package myfirstpr;

public class imp implements I1, I2 {

    @Override
    public void evenodd(int num) {
        if(num%2==0) {
            System.out.println("The number is even "+num);
        }
        else {
            System.out.println("The number is odd "+num);
        }

    }

    @Override
    public void fact(int num) {
        // TODO Auto-generated method stub
        int fact1=1;
        for(int i=1;i<=num;i++) {
            fact1=fact1*i;
        }
        System.out.println("factorial is "+fact1);
    }
    public static void main(String args[]) {
        imp ob = new imp();
        ob.fact(10);
        ob.evenodd(232);
    }

}