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Tip of the Day
Language: Java
Expertise: Beginner
Aug 19, 2002

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


How to Implement an Interface Without Giving an Implements Keyword


In the code below, inter is an interface which has a method add(int i1,int i2). The implementation is done in Impl class.
 
Interface code(inter.java)
public interface inter
{
  public int add(int i1,int i2);
}

Class Code(Impl.java)
public class Impl
{
 public Impl()
  { // implement the interface by anonymous inner
class
    inter i=new inter()
     {
	  public int add(int i1,int i2)
           {
	    return i1+i2;
	   }
     };
     
    System.out.println(i.add(4,5));
    
  } //end of constructor
  public static void main(String a[])
  {
	  ser d =new ser();
  }
}//end of class

Thus, the interface is implemented in Impl class without an implements keyword.
Gaje Gajendran
 
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