II B.Tech II Sem CSE Java Exercise - 6 b(Inheritance - Continued)

b) Implementing interface

Aim:To write a JAVA program to implement Interface.

Description:

Program:

(i) First form of interface implementation

interface A 
{
void display(); 
}
class B implements A 
{
public void display() 
{
System.out.println("B's method"); 
}
}
class C extends B 
{
public void callme() 
{
System.out.println("C's method"); 
}
}
class interfacedemo 
{
public static void main(String args[]) 
{
C c1=new C(); 
c1.display(); 
c1.callme();
} 
}
Output:

(ii) Second form of interface implementation
interface D 
{
void display(); 
}
interface E extends D 
{
void show(); 
}
class A 
{
void callme() 
{
System.out.println("This is in callme method"); 
}
}
class B extends A implements E 
{
public void display() 
{
System.out.println("This is in display method"); 
}
public void show() 
{
System.out.println("This is in show method"); 
}
}
class C extends B 
{
void call() 
{
System.out.println("This is in call method"); 
}
}
class interfacedemo1 
{
public static void main(String args[]) 
{
C c1=new C(); 
c1.display(); 
c1.show(); 
c1.callme(); 
c1.call();
} 
}

Output:

(iii) Third form of interface implementation

interface A
{
void display();
}
class B implements A 
{
public void display() 
{
System.out.println("This is in B's method"); 
}
}
class C implements A 
{
public void display() 
{
System.out.println("This is C's method"); 
}
}
class interfacedemo2 
{
public static void main(String args[]) 
{
B b1=new B(); 
C c1=new C(); 
b1.display(); 
c1.display();
}
}

Output:

(iv) Fourth form of interface implementation

interface A
{
void display(); 
}
interface B 
{
void callme(); 
}
interface C extends A,B 
{
void call(); 
}
class D implements C 
{
public void display() 
{
System.out.println("interface A"); 
}
public void callme() 
{
System.out.println("interface B"); 
}
public void call() 
{
System.out.println("interface C"); 
}
}
class interfacedemo3
{
public static void main(String args[]) 
{
D d1=new D(); 
d1.display(); 
d1.callme(); 
d1.call();
}

}

Output:

Share This:

Facebook

Twitter

Google Plus

Pinterest

Linkedin