Generalization in JAVA

    GENERALIZATION

Program in JAVA:

(other members are eliminated for better understanding..)

package generalization;

public interface Distance
{
public void go();
}
class OnCycle implements Distance
{
public void go()
{
System.out.println("covered 2 km on cycle...");
}
}
class OnBike implements Distance
{
public void go()
{
System.out.println("covered 5 km on bike...");
}
}
class OnCar implements Distance
{
public void go()
{
System.out.println("covered 7 km on car...");
}
}
class Generalization
{
public static void move(Distance d1)  //Generalized method
{
d1.go();            //which uses up casting process
}
public static void main (String [] args)
{
move(new OnCycle());  //Distance d1= new OnCycle();
move(new OnBike());   //Distance d1= new OnBike();
move(new OnCar());    //Distance d1= new OnCar();
}
}