Question

fisrt one is bicycle.java
second code is bicycleapp.java
can anyone help this??? please save my life 

Before you begin, DOWNLOAD the files “Lab8_Bicycle.java” and “Lab8_BicycleApp.java” from Canvas to your network drive (not the local hard drive or desktop). Once you have the files saved, RENAME THE FILES Bicycle.java and BicycleApp.java then open each file. 1) Look at the Bicycle class. Two of the many data properties we could use to define a bike are its color and the gear it is currently in. Since both properties are private, we need methods to be able to change the values for these data properties. Read through the code provided for these methods. 2) Within the Bicycle class, fill in the code need to create the 4 overloaded constructors and the code need to change the color and gear of a bike within the set methods. 3) Next, within the Bicycle class, comment out the last 2 methods (display…) and create a single ‘toString’ method that will have nothing passed to it and returns a string that can be used within a println statement to display the data properties of a given Bicycle object in the same format as the two given methods. Your toString methods will NOT contain any println methods. Method signature: public String toString() …Make sure that the Bicycle class compiles (not executes) before continuing… 4) Finish the BicycleApp class by doing the following: - Create an array that will hold 4 Bicycle Objects - Use your set methods to change the gear and color of the first bike - Display the new current state of all bicycles in the array using your toString method …Compile and Run your program to make sure it works properly before continuing… Part 2: Required unless otherwise specified by your GTA 5) To the Bicycle class, add a method with the following signature: public boolean equals (Bicycle other) - Methods returns true if the color and gear of the calling object (this) is the same as the color and gear of the bike passed to the method (other), otherwise returns false 6) Within the BicycleApp class, create another bicycle object (newBike) that is NOT part of the array. Color is purple and the gear is 1. - Use the equals method to determine if newBike is equal to any other bike in the array. If so, display “newBike object matches a current bike in the array” otherwise display "newBike object does NOT match a current bike in the array" 
Defines the Bicycle class containing the following data propeties:
 1) color of the bike
 2) current gear the bike is in

Includes 4 constructors, a setColor and setGear methods, and toString method
Part 2 modification adds an equals method
*/

import java.util.Scanner;

public class Bicycle
{//instance variables
  private int gear;
  private String color;

// Constructor #1: set default gear to 1 and the color to primer gray
  public Bicycle ()
  {
  } // end 'default' no-argument constructor

// Constructor #2: sets the gear to a passed-in value
// and color to same default color as constructor #1
  public Bicycle (int newGear)
  {
  } // end one-argument constructor (sets the gear)

// Constructor #3: sets the color to the passed-in value
// and the gear to the same default gear as constructor #1
  public Bicycle (String newColor)
  {
  } // end one-argument constructor (sets the color)

// Constructor #4: sets the gear to the passed-in value
// and sets the color as the passed-in value
  public Bicycle (int newGear, String newColor)
  {
  } // end two-argument constructor (sets gear and color)

  //Sets the private data property 'gear' with the value passed in
  public void setGear(int newGear)
  {
  } //end of method setGear

    //Sets the private data property 'color' with the value passed in
  public void setColor(String newColor)
  {
  } //end of method setGear

  //This method displays the value of the String variable 'color'
  public void displayColor()
  { System.out.println ("The color of the bike is " + color);
  } //end method displayColor

  //This method displays the value of the int variable 'gear'
  public void displayGear()
  { System.out.println ("The bike is in gear #" + gear);
  } //end method displayGear

// Comment out the two methods above...
// Create a toString method that returns a String that can
// be used to display the data properties of a bicycle in the
// same format you are commenting out
        

// Create an equals method that returns true if the bikes are
// in the same gear and are the same color, otherwise returns false...


} //end class Bicycle

/* BicycleApp.java - application class for the Bicycle class

   Creates an array of 4 bike objects, displays data properties of all using the toString method,
   changes the gear and color on bike[0] then displays
   the new data properties of all using the toString method

   Part 2 - Create another bicycle object that is NOT part of the array
   and use the equals method to determine if it is equal to any of the
   other bikes in the array
   */
   import java.util.*;

   public class BicycleApp
   {
   public static void main(String[] args)
   {  
   // declare an array of 4 Bicycle objects

       // Instantiate the 4 bike objects (Done for you)
       bikes[0] = new Bicycle();
       bikes[1] = new Bicycle(6);
       bikes[2] = new Bicycle ("purple");
       bikes[3] = new Bicycle (10, "red");

   // display initial state of all bicycles in the array using the toString method
       // Done for you
   for (int i = 0; i < bikes.length; i++)
           System.out.println("Bike [" + i + "]\n" + bikes[i]);

       // Read in a new color and gear for Bike[0] and
       // use the set methods to change the 'state' of bike
       Scanner in = new Scanner(System.in); // LOCAL variable
       System.out.print ("Please enter the new color of the bike[0]: ");
   String color = in.nextLine();

   System.out.print ("Please enter the new current gear that the bike[0] is in: ");
   int gear = in.nextInt();
   // validate data
   while ( (gear < 1) || (gear > 10) )
   { System.out.println (gear + " is an invalid gear ...");
   System.out.print ("Valid gears are 1-10... please re-enter: ");
   gear = in.nextInt();
   } // end while
      
       System.out.println("Changing the gear and color of bike[0]...\n");
   // call setGear method on bike[0]
   // call setColor method on bike[0]

   // display the current state of all bicycles in the array using the toString method
   // see earlier code in this file

   // Part 2 - Create another bicycle object (newBike) that is NOT part of the array
   // Color is purple and the gear is 1

   // Use a loop and equals method to determine if newBike is equal to any
   // of the other bikes in the array
   // If so, display "newBike object matches a current bike in the array"
   // oherwise display "newBike object does NOT match a current bike in the array"

   } //end of method main
   } //end of class BicycleApp

Answer 1

Please find the required solution:

Bicycle.java

public class Bicycle {// instance variables
   private int gear;
   private String color;

   // Constructor #1: set default gear to 1 and the color to primer gray
   public Bicycle() {
       gear = 1;
       color = "primer gray";
   } // end 'default' no-argument constructor

   // Constructor #2: sets the gear to a passed-in value
   // and color to same default color as constructor #1
   public Bicycle(int newGear) {
       gear = newGear;
       color = "primer gray";
   } // end one-argument constructor (sets the gear)

   // Constructor #3: sets the color to the passed-in value
   // and the gear to the same default gear as constructor #1
   public Bicycle(String newColor) {
       gear = 1;
       color = newColor;
   } // end one-argument constructor (sets the color)

   // Constructor #4: sets the gear to the passed-in value
   // and sets the color as the passed-in value
   public Bicycle(int newGear, String newColor) {
       gear = newGear;
       color = newColor;
   } // end two-argument constructor (sets gear and color)

   // Sets the private data property 'gear' with the value passed in
   public void setGear(int newGear) {
       gear = newGear;
   } // end of method setGear

   // Sets the private data property 'color' with the value passed in
   public void setColor(String newColor) {
       color = newColor;
   } // end of method setGear

   /*
   * // This method displays the value of the String variable 'color' public
   * void displayColor() { System.out.println("The color of the bike is " +
   * color); } // end method displayColor
   *
   * // This method displays the value of the int variable 'gear' public void
   * displayGear() { System.out.println("The bike is in gear #" + gear); } //
   * end method displayGear
   */
   // Comment out the two methods above...
   // Create a toString method that returns a String that can
   // be used to display the data properties of a bicycle in the
   // same format you are commenting out
   @Override
   public String toString() {
       return "The color of the bike is " + color + " "
               + "The bike is in gear #" + gear;
   }

   // Create an equals method that returns true if the bikes are
   // in the same gear and are the same color, otherwise returns false...
   @Override
   public boolean equals(Object arg0) {
       Bicycle cycle = (Bicycle) arg0;
       return cycle.gear == gear && cycle.color.equals(color);
   }

} // end class Bicycle

BicycleApp.java

import java.util.*;

public class BicycleApp {
   public static void main(String[] args) {
       Bicycle[] bikes = new Bicycle[4];
       // declare an array of 4 Bicycle objects
       // Instantiate the 4 bike objects (Done for you)
       bikes[0] = new Bicycle();
       bikes[1] = new Bicycle(6);
       bikes[2] = new Bicycle("purple");
       bikes[3] = new Bicycle(10, "red");
       // display initial state of all bicycles in the array using the toString
       // method
       // Done for you
       for (int i = 0; i < bikes.length; i++)
           System.out.println("Bike [" + i + "]\n" + bikes[i]);
       // Read in a new color and gear for Bike[0] and
       // use the set methods to change the 'state' of bike
       Scanner in = new Scanner(System.in); // LOCAL variable
       System.out.print("Please enter the new color of the bike[0]: ");
       String color = in.nextLine();
       System.out
               .print("Please enter the new current gear that the bike[0] is in: ");
       int gear = in.nextInt();
       // validate data
       while ((gear < 1) || (gear > 10)) {
           System.out.println(gear + " is an invalid gear ...");
           System.out.print("Valid gears are 1-10... please re-enter: ");
           gear = in.nextInt();
       } // end while

       System.out.println("Changing the gear and color of bike[0]...\n");
       // call setGear method on bike[0]
       bikes[0].setGear(gear);
       // call setColor method on bike[0]
       bikes[0].setColor(color);
       // display the current state of all bicycles in the array using the
       // toString method
       // see earlier code in this file
       for (int i = 0; i < bikes.length; i++)
           System.out.println("Bike [" + i + "]\n" + bikes[i]);
       // Part 2 - Create another bicycle object (newBike) that is NOT part of
       // the array
       Bicycle newBike = new Bicycle();
       // Color is purple and the gear is 1
       newBike.setColor("purple");
       newBike.setGear(1);
       // Use a loop and equals method to determine if newBike is equal to any
       // of the other bikes in the array
       // If so, display "newBike object matches a current bike in the array"
       // otherwise display
       // "newBike object does NOT match a current bike in the array"
       for (int i = 0; i < bikes.length; i++) {
           if (newBike.equals(bikes[i])) {
               System.out
                       .println("newBike object matches a current bike in the array");
           } else {
               System.out
                       .println("newBike object does NOT match a current bike in the array");
           }
       }
       in.close();
   } // end of method main
} // end of class BicycleApp