Interfacing in java

[harish4java]

hi everybody am new to work with java. So please do help to be a successful developer in java.....
My first question is How java can implement interface concept in the place of inheritance? And please tell the steps to implement interface concept?

[JosAH]

If a class C implements an interface I it signs a contract saying: you can treat
me as an I instead of a C. It adds another 'face' to the class. Implmenting a
interface is easy; e.g.

[code=java]
// the interface:
public interface I
public int aMethod();
public int anotherMethod() ;
}
// the implementing class:
public class C implements I {
// complete implementation of I
public int aMethod() { return 42; }
public int anotherMethod() { return 54; }
}
[/code]

If a class says it implements an interface as in "implements I" but it doesn't
implement all of the methods of the interface, the class must be abstract so
that a derived class can complete the implementation of the interface:

[code=java]
public abstract class C implements I {
public int aMethod() { return 42; } // partial implementation of I
// no implementation of anotherMethod()
}
public class Derived extends C {
public int anotherMethod() { return 54; } // completes implementation of I
}
[/code]

This all is completely explained in your textbook; read it.

kind regards,

Jos