Interface Inheritance (Java Program): meaning of each line of the program?

Hi guys. I'm just preparing for my exam. help me to explain every line of this program:

Code :

---

interface J {
    int j = 200;
    int j1();
}
interface K {
    double k1();
}
interface L extends J,K{
    boolean l1();
}
class I implements L{
    public boolean l1() {
        return true;
    }
    public int j1() {
        return 4;
    }
    public double k1() {
        return 6.8;
    }
}
class InterfaceInheritance{
    public static void main(String[] g){
        I i=new I();
        System.out.println(i.j);
        System.out.println(i.j1());
        System.out.println(i.k1());
        System.out.println(i.l1());
    }
}

---

Result :
200
4
6.8
true

And My second question is how to create o class that implements the interface j and k. Then, call the method on a main program in class InterfaceInheritance.

thanks for helping me prepare for the exam

You will learn a lot more if you sit down and study the code, research what you don't understand. Asking someone else to explain this code is a vague request - what don't you understand about it? If you have a specific question, ask it.

This thread has been cross posted here:

http://www.java-forums.org/new-java/61255-interface-inheritance-create-class-implements-interface.html

Although cross posting is allowed, for everyone's benefit, please read:

Java Programming Forums Cross Posting Rules

The Problems With Cross Posting