Question

Programming Problem 2 - Cycle [A] Create a class called “Cycle” which has two instance integer variables as properties, “numberOfWheels” and “weight.” Create a constructor with two parameters, using the same variable names in the parameter list. Assign each variable to numberOfWheels” and “weight” respectively. Write a separate application to test the class and display its properties. Note: Do not change the names of the instance variables or the variables listed in the constructor’s parameter list. [B] Edit your class Cycle by adding a default constructor which will assign the default values of 100 to represent the numberOfWheels, and 1000 to represent the weight, by invoking a call to the other constructor. Modify your application created in [A] to test the class. Directions [A] Create a class called Cycle • Declare integer instance variables numberOfWheels and weight as private. • Include a toString() method in the Cycle class. No set or get methods are included. • Create a constructor with two parameters, using the same variable names numberOfWheels and weight in the parameter list. Complete the constructor as necessary. • Create a separate application to test the class. o Create an object of the Cycle class. o Display the properties of the object. [B] Add a default constructor • Edit the default constructor such that the default constructor will invoke the existing constructor with the default values of 100 to represent the numberOfWheels, and 1000 to represent the weight. Invoke the constructor using the “this” reference. o Create the second constructor which will receive the two arguments. • Create a separate application to test the class. o Create an object of the Cycle class. o Display the properties of the object.

Answer 1

Below are your programs. Let me know in comments if you need something else in this.

a)

Cycle.java

public class Cycle {

//Declaration of variables

private int numberOfWheels;

private int weight;

//Constructor

public Cycle(int numberOfWheels, int weight) {

this.numberOfWheels = numberOfWheels;

this.weight = weight;

}

//toString() method

public String toString() {

return "Cycle [numberOfWheels=" + numberOfWheels + ", weight=" + weight + "]";

}

}

MainA.java

public class MainA {

public static void main(String[] args) {

Cycle yc = new Cycle(2, 10);

System.out.println(yc);

}

}

Sample Run: -

Cycle [numberOfWheels=2, weight=10

B)

Cycle.java

public class Cycle {

// Declaration of variables

private int numberOfWheels;

private int weight;

// Constructor Parameterized

public Cycle(int numberOfWheels, int weight) {

this.numberOfWheels = numberOfWheels;

this.weight = weight;

}

// Default Constructor

public Cycle() {

this(100, 1000);

}

// toString() method

public String toString() {

return "Cycle [numberOfWheels=" + numberOfWheels + ", weight=" + weight + "]";

}

}

MainB.java

public class MainB {

public static void main(String[] args) {

Cycle yc = new Cycle();

System.out.println(yc);

}

}

Sample Output

Cycle [numberOfWheels=100, weight=1000]

Update

MainB.java

public class MainB {

public static void main(String[] args) {

Cycle yc = new Cycle();

System.out.println(yc);

}

}

class Cycle {

// Declaration of variables

private int numberOfWheels;

private int weight;

// Constructor Parameterized

public Cycle(int numberOfWheels, int weight) {

this.numberOfWheels = numberOfWheels;

this.weight = weight;

}

// Default Constructor

public Cycle() {

this(100, 1000);

}

// toString() method

public String toString() {

return "Cycle [numberOfWheels=" + numberOfWheels + ", weight=" + weight + "]";

}

}