how to make one java class inherit from another

1public class Bicycle {
2        
3    // the Bicycle class has three fields
4    public int cadence;
5    public int gear;
6    public int speed;
7        
8    // the Bicycle class has one constructor
9    public Bicycle(int startCadence, int startSpeed, int startGear) {
10        gear = startGear;
11        cadence = startCadence;
12        speed = startSpeed;
13    }
14        
15    // the Bicycle class has four methods
16    public void setCadence(int newValue) {
17        cadence = newValue;
18    }
19        
20    public void setGear(int newValue) {
21        gear = newValue;
22    }
23        
24    public void applyBrake(int decrement) {
25        speed -= decrement;
26    }
27        
28    public void speedUp(int increment) {
29        speed += increment;
30    }
31        
32}
33