Question

This is the code I have written for a BingoBall program, I'd appreciate it if someone could help me fix this

public class BingoBall {

private char letter;

private int number;

// NOTE TO STUDENT

// We challenge you to use this constant array as a lookup table to convert a number

// value to its appropriate letter.

// HINT: It can be done with with a single expression that converts the number

// to an index position in the following array.

private static char[] bingo = {'B','I','N','G','O'};

/**

* Creates a BingoBall with the given value.

* The appropriate letter is assigned.

* @param value between 1 and 75.

* @throws IllegalArgumentException if the

* number is not correct.

*/

public BingoBall(int value) {

number=value;

if(value<=15){

letter = 'B';

}

else

if (value<=30){

letter='I';

}

else

if (value<=45){

letter='N';

}

else

if(value<=60){

letter='G';

}

else

letter='O';

}

/**

* @return number value of BingoBall

*/

public int getValue() {

return number;

}

/**

* @return letter value of BingoBall

*/

public char getLetter() {

return letter;

}

/**

* Updates the number of BingoBall.

* The letter is automatically adjusted to the new value.

* @param The new value.

* @throws IllegalArgumentException if the

* value is not in between 1 and 75

*/

public void setValue(int value) {

number=value;

}//throw new IllegalArgumentException();

/*Determines if this BingoBall is equivalent to another BingoBall.

* Two BingoBalls are equivalent if their number value is the same.

* @param The BingoBall that is compared to this one.

* @return True if the balls are equivalent.

*/

public boolean equals(BingoBall other) {

return number.equals(other.number);

}

/* method returns a string that "textually represents" this object.

* @return a String representation of the ball as a letter immediately followed by an integer.

*/

public String toString() {

String str= getLetter()+" "+getValue()+" ";

return str;

}

// NOTE TO STUDENT:

// The following code is provided as an example of the testing

// that is required in each class that is created.

// Since this testing is done internally, any private methods you

// create can also be tested.

public static void main(String[] args) {

BingoBall b = new BingoBall(42);

System.out.println("Created a BingoBall: "+b);

System.out.println("The number is "+b.getValue());

System.out.println("The letter is "+b.getLetter());

BingoBall c = null;

try {

c = new BingoBall(76);

} catch (Exception e) {

System.out.println("Correctly caught the exception");

}

System.out.println("Created a second BingoBall: "+c);

c = new BingoBall(14);

if (!b.equals(c)) {

System.out.println("The two balls are not equivalent");

}

c.setValue(42);

System.out.println("The second ball has been changed to "+c);

if (b.equals(c)) {

System.out.println("They are now equivalent");

}

c.setValue(74);

System.out.println("The second bingo ball has been changed to "+c);

}

}

Answer 1

I hav fixed the Error

public class BingoBall {

   private char letter;

   private int number;

   // NOTE TO STUDENT

   // We challenge you to use this constant array as a lookup table to convert

   // a number

   // value to its appropriate letter.

   // HINT: It can be done with with a single expression that converts the

   // number

   // to an index position in the following array.

   private static char[] bingo = { 'B', 'I', 'N', 'G', 'O' };

   /**

   *

   * Creates a BingoBall with the given value.

   *

   * The appropriate letter is assigned.

   *

   * @param value

   * between 1 and 75.

   *

   * @throws IllegalArgumentException

   * if the

   *

   * number is not correct.

   *

   */

   public BingoBall(int value) {

       number = value;

       if (value <= 15) {

           letter = 'B';

       }

       else

       if (value <= 30) {

           letter = 'I';

       }

       else

       if (value <= 45) {

           letter = 'N';

       }

       else

       if (value <= 60) {

           letter = 'G';

       }

       else

           letter = 'O';

   }

   /**

   *

   * @return number value of BingoBall

   *

   */

   public int getValue() {

       return number;

   }

   /**

   *

   * @return letter value of BingoBall

   *

   */

   public char getLetter() {

       return letter;

   }

   /**

   *

   * Updates the number of BingoBall.

   *

   * The letter is automatically adjusted to the new value.

   *

   * @param The

   * new value.

   *

   * @throws IllegalArgumentException

   * if the

   *

   * value is not in between 1 and 75

   *

   */

   public void setValue(int value) {

       number = value;

   }// throw new IllegalArgumentException();

   /*

   * Determines if this BingoBall is equivalent to another BingoBall.

   *

   * Two BingoBalls are equivalent if their number value is the same.

   *

   * @param The BingoBall that is compared to this one.

   *

   * @return True if the balls are equivalent.

   *

   */

   public boolean equals(BingoBall other) {

       return number == other.number;

   }

   /*

   * method returns a string that "textually represents" this object.

   *

   * @return a String representation of the ball as a letter immediately

   * followed by an integer.

   *

   */

   public String toString() {

       String str = getLetter() + " " + getValue() + " ";

       return str;

   }

   // NOTE TO STUDENT:

   // The following code is provided as an example of the testing

   // that is required in each class that is created.

   // Since this testing is done internally, any private methods you

   // create can also be tested.

   public static void main(String[] args) {

       BingoBall b = new BingoBall(42);

       System.out.println("Created a BingoBall: " + b);

       System.out.println("The number is " + b.getValue());

       System.out.println("The letter is " + b.getLetter());

       BingoBall c = null;

       try {

           c = new BingoBall(76);

       } catch (Exception e) {

           System.out.println("Correctly caught the exception");

       }

       System.out.println("Created a second BingoBall: " + c);

       c = new BingoBall(14);

       if (!b.equals(c)) {

           System.out.println("The two balls are not equivalent");

       }

       c.setValue(42);

       System.out.println("The second ball has been changed to " + c);

       if (b.equals(c)) {

           System.out.println("They are now equivalent");

       }

       c.setValue(74);

       System.out.println("The second bingo ball has been changed to " + c);

   }

}




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See Output



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