/*Topic-> Adapter Class:-

*

* (i) It is a simple java class that implements an interface only with empty

* implementation (body) for every method.

*

* (ii) If we implement an interface the copulsorily we should give the body for

* all the methods whether it is required or not.

*

* (iii)It is design pattern allowed to solve the problem of direct implementation of interface.

*

* eg-

*/

interface X4

{

void m11();

void m22();

void m33();

void m44();

}

class Test2 implements X4

{

//in this class we need only m3() but as we implement we need to implementation of all methods

public void m33()

{

System.out.println("m3() is executing....");

}

//rest of the we will give as empty implementation

//This approach increases the length of the code and reduces readability

public void m11() {}

public void m22() {}

public void m44() {}

}

//Solution:

abstract class AdapterX4 implements X4

{

public void m11() {}

public void m22() {}

public void m33() {}

public void m44() {}

}

class Test3 extends AdapterX4

{

public void m33()

{

System.out.println("m3() is need only...");

}

}

public class NinthCode_AdapterClass {

public static void main(String[] args) {

X4 ref=new Test3(); //loose coupling and this is a good approach

ref.m33();

}

}