Java Programming by Pearson

Event Handling • 439

so ordinary inner classes cannot have static data, static fi elds or nested classes. However, nested classes can

have all of these.

Consider the example given below:

/*PROG 15.20 DEMO OF STATIC NESTED CLASS */

class demo

{

int num = 20;

static class demo1

{

void display()

{

demo d = new demo();

System.out.println("\nHello from display num: "

+d.num);

}

}//inner class ends

}//outer class ends

class JPS9

{

public static void main(String[] args)

{

demo.demo1 d1 = new demo.demo1();

d1.display();

}

}

OUTPUT:

Hello from display num: 20

Explanation: ...