Can interfaces have constructors in Java?

No, interfaces can’t have constructors for the following reasons −

  • All the members of an interface are abstract, and since a constructor cannot be abstract.

Still, if you try to write a constructor within an interface it will generate a compile time error.


public interface InterfaceTest {
   public abstract void display();
   public abstract void show();


C:\Sample>javac error: <dentifier> expected
public InterfaceTest(){
1 error
karthikeya Boyini
karthikeya Boyini

I love programming (: That's all I know