Example of inheritance in java

    public class Bicycle {
       
        // the Bicycle class has three fields
        public int cadence;
        public int gear;
        public int speed;
       
        // the Bicycle class has one constructor
        public Bicycle(int startCadence, int startSpeed, int startGear) {
            gear = startGear;
            cadence = startCadence;
            speed = startSpeed;
        }
       
        // the Bicycle class has four methods
        public void setCadence(int newValue) {
            cadence = newValue;
        }
       
        public void setGear(int newValue) {
            gear = newValue;
        }
       
        public void applyBrake(int decrement) {
            speed -= decrement;
        }
       
        public void speedUp(int increment) {
            speed += increment;
        }
       
    }



    public class MountainBike extends Bicycle {
       
        // the MountainBike subclass adds one field
        public int seatHeight;

        // the MountainBike subclass has one constructor
        public MountainBike(int startHeight, int startCadence, int startSpeed, int startGear) {
            super(startCadence, startSpeed, startGear);
            seatHeight = startHeight;
        }   
       
        // the MountainBike subclass adds one method
        public void setHeight(int newValue) {
            seatHeight = newValue;
        }   

    }


/*Here MountainBike class inherit all the fields and methods from bi-cycle class.
And also MountainBike class has new field and method seatheight*/