Can we define a inner class in an interface?

[Minhaj Mehmood]

Can we define a inner class in an interface?


-Minhaj

[Ankit Garg]

Why don't you try it yourself??

[Leonardo Carreira]

As far as i know, inner class could be declare in an interface..

this is the code for instantiate and access method :

   
TheInterface.TheInnerClass reference1= new TheInterface.TheInnerClass();
reference1.sayHello(); 

[Rajiv Chopra]

Yes we can declare inner classes in Interfaces too.

best practice is to seprate the implementations from Interfaces.

[Salil Vverma]

Hi All,

I think,Minhaj's question was about defining not declaring.

Minhaj - we can define and declare the inner class in an interface. As you can see the below mentioned section of code.

 
interface InterfaceTest {
	class TestInnerClass {
		public void printIt() {
			System.out.println("This in inside in the interface");
		}
	}
}

public class TestInterface implements InterfaceTest {

	public static void main(String[] args) {
		TestInnerClass t = new TestInnerClass();
		t.printIt();
	}

}

[Rajiv Chopra]

Salil Vverma wrote:Hi All,

I think,Minhaj's question was about defining not declaring.

Minhaj - we can define and declare the inner class in an interface. As you can see the below mentioned section of code.

 
interface InterfaceTest {
	class TestInnerClass {
		public void printIt() {
			System.out.println("This in inside in the interface");
		}
	}
}

public class TestInterface implements InterfaceTest {

	public static void main(String[] args) {
		TestInnerClass t = new TestInnerClass();
		t.printIt();
	}

}

Hi Salil,
Thanks for example.
Please can you explain the meaning of define and declare seprately.
How we can define? and How we can declare?
Thanks in advance.