Inheritance concept

 Implementation of Inheritence

package practice.test;

public class Bicycle {

public int gear;

public int speed;

// Constructor

public Bicycle(int gear,int speed) {

this.gear=gear;

this.speed=speed;

}

// the Bycycle class has three methods

public void applyBreak(int decrement) {

speed-=decrement;

}

public void speedUp(int increment) {

speed+=increment;

}

public String toString() {

return ("No of gears are "+gear+"\n"+"speed of bicycle is"+speed);

}

}

// derived class

class MountainBike extends Bicycle

{

public int seatHeight;

public MountainBike(int gear,int speed,int seatHeight) {

super(gear,speed);

this.seatHeight=seatHeight;

}

// method

public void setSeatHeight(int newValue) {

seatHeight=newValue;

}

@Override

public String toString() {

return (super.toString() + "\n height is \t"+seatHeight);

}

}

package practice.test;

public class Tests {

public static void main(String[] args) {

// TODO Auto-generated method stub

MountainBike mBike=new MountainBike(3,100, 25);

System.out.println(mBike.toString());

}

}

-- Output

No of gears are 3

speed of bicycle is100

 height is 25