Slide 10.11: Inheritance types (cont.): Hierarchical inheritance

Inheritance Types (Cont.)

Hierarchical Inheritance
In herarchical inheritance, one class serves as a superclass (base class) for more than one subclass. In the figure below, the class A serves as a base class for the derived class B, C, and D.

Hierarchical.java (hierarchical inheritance)

// Hierarchical inheritance 
// Driver class
public class Hierarchical {
  public static void main( String[ ] args ) {
    C c1 = new C( );
    c1.printName( args[0] );
    B b1 = new B( );
    b1.printFor ( );
    c1.printName( args[0] );
    D d1 = new D( );
    d1.printFor ( );
    d1.printName( args[0] );
  }
}
class A {
  public void printName( String name ) {
    System.out.print( name );
  }
  public void printFor( ) {
    System.out.print( " for " );
  }
}
class B extends A {
  public void printFor( ) {
    System.out.print( " 4 " );
  }
}
class C extends A { }
class D extends A { }

shell> java Hierarchical

Output:

Result:

Review: Inheritance Definition

Result: