20 lines
506 B
Java
20 lines
506 B
Java
// interfaces/Instantiable.java
|
|
// (c)2020 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://OnJava8.com for more book information.
|
|
|
|
abstract class Uninstantiable {
|
|
abstract void f();
|
|
abstract int g();
|
|
}
|
|
|
|
public class Instantiable extends Uninstantiable {
|
|
@Override
|
|
void f() { System.out.println("f()"); }
|
|
@Override
|
|
int g() { return 22; }
|
|
public static void main(String[] args) {
|
|
Uninstantiable ui = new Instantiable();
|
|
}
|
|
}
|