Question

Please help me.

package a1;

public class Methods {

   /*
   * Instructions for students: Use the main method only to make calls to the
   * other methods and to print some testing results. The correct operation of
   * your methods should not depend in any way on the code in main.
   *
   * Do not do any printing within the method bodies, except the main method.
   *
   * Leave your testing code in main -- you will be graded on this. You can remove
   * this comment from your submission.
   */

   /**
   * In main, write code that exercises all the methods you write. This code
   * should call the methods with different arguments and print out results. You
   * should think about different arguments to try that tests different cases. For
   * example, if the method returns a true or false, write code that creates a
   * true result and other code that produces a false result. Use print statements
   * to explain what each test is checking and the result that was obtained. The
   * assignment gives a small example of this. Running this program should output
   * a small report on examples of using the different methods.
   *
   * Replace this comment with your own Javadoc comment
   */
   public static void main(String[] args) {
       // Add tests here
      
   }

/**

   * Produces a String starting and ending with the edge character and having the
   * inner char repeated in-between. The total number of characters in the string
   * is width. As an example makeLine('+', '-', 8) would return the string
   * "+------+".
   *
   * NOTE: This method is already completely implemented and must not be modified
   * for the assignment.
   *
   * @param edge The character used at the start and end of the returned string.
   * @param inner The character repeated in-between the edge char.
   * @param width The total number of characters in the returned string. Width
   * must be greater or equal to 2.
   * @return A string with width characters.
   */
   public static String makeLine(char edge, char inner, int width) {
       String line = "";
       int currentLocation = 0;
       // Make the middle part of the line first.
       while (currentLocation < width - 2) {
           line = line + inner;
           currentLocation = currentLocation + 1;
       }
       // Add in the start and end character to the line.
       return edge + line + edge;
   }

   /**
   * Returns a string which, when printed out, will be a square shaped like this,
   * but of varying size (note - even though there are the same number of
   * characters side-to-side as up-and-down, the way text is drawn makes this look
   * not like a square. We will consider it a square.):
   *
   * <pre>
   * +-----+
   * | |
   * | |
   * | |
   * | |
   * | |
   * +-----+
   * </pre>
   *
   * The returned string should consist of width lines, each ending with a
   * newline. In addition to the newline, the first and last lines should begin
   * and end with '+' and should contain width-2 '-' symbols. In addition to the
   * newline, the other lines should begin and end with '|' and should contain
   * width-2 spaces.
   *
   * A newline is a special character use to force one string to be on multiple
   * lines. System.out.println("Hi\nThere"); will produce output like Hi There
   *
   * The '\n' character is a newline.
   *
   * The method does not print anything.
   *
   * The width parameter must be greater than or equal to 2.
   *
   * You should use while, if, and else statement.
   *
   * IMPLEMENTATION NOTE: For full credit (and for easier implementation), make
   * use of the makeLine method provided above in your implementation of
   * makeRectangle. You'll need to use a loop to call makeLine the correct number
   * of times.
   *
   * Replace this comment with your own Javadoc comment
   */
   public static String makeSquare(int width) {
       return ""; // Replace this line with your own code.
   }
}

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

Note: Please try not to lose any formatting/spacing while copy-pasting the code, it might mess with the tests.

// Methods.java

public class Methods {

    /*

    * Instructions for students: Use the main method only to make calls to the

    * other methods and to print some testing results. The correct operation of

    * your methods should not depend in any way on the code in main.

    *

    * Do not do any printing within the method bodies, except the main method.

    *

    * Leave your testing code in main -- you will be graded on this. You can

    * remove this comment from your submission.

    */

    /**

    * In main, write code that exercises all the methods you write. This code

    * should call the methods with different arguments and print out results.

    * You should think about different arguments to try that tests different

    * cases. For example, if the method returns a true or false, write code

    * that creates a true result and other code that produces a false result.

    * Use print statements to explain what each test is checking and the result

    * that was obtained. The assignment gives a small example of this. Running

    * this program should output a small report on examples of using the

    * different methods.

    *

    * Replace this comment with your own Javadoc comment

    */

    public static void main(String[] args) {

        // code for testing makeLine method

        System.out.println("Testing makeLine() method");

        String expected = "+---+"; // expected result

        String actual = makeLine('+', '-', 5); // actual result

        System.out.println("makeLine('+', '-', 5)");

        // printing expected, actual and the result of the test

        System.out.println("Expected:\n" + expected);

        System.out.println("Actual:\n" + actual);

        if (expected.equals(actual)) {

             //success

             System.out.println("Test PASSED\n");

        } else {

             //failure

             System.out.println("Test FAILED\n");

        }

        expected = "XoX";

        actual = makeLine('X', 'o', 3);

        System.out.println("makeLine('X', 'o', 3)");

        System.out.println("Expected:\n" + expected);

        System.out.println("Actual:\n" + actual);

        if (expected.equals(actual)) {

             System.out.println("Test PASSED\n");

        } else {

             System.out.println("Test FAILED\n");

        }

        expected = "----------";

        actual = makeLine('-', '-', 10);

        System.out.println("makeLine('-', '-', 10)");

        System.out.println("Expected:\n" + expected);

        System.out.println("Actual:\n" + actual);

        if (expected.equals(actual)) {

             System.out.println("Test PASSED\n");

        } else {

             System.out.println("Test FAILED\n");

        }

        // code for testing makeSquare method

        System.out.println("Testing makeSquare() method");

        expected = "+-+\n| |\n+-+";

        actual = makeSquare(3);

        System.out.println("makeSquare(3)");

        System.out.println("Expected:\n" + expected);

        System.out.println("Actual:\n" + actual);

        if (expected.equals(actual)) {

             System.out.println("Test PASSED\n");

        } else {

             System.out.println("Test FAILED\n");

        }

        expected = "++\n++";

        actual = makeSquare(2);

        System.out.println("makeSquare(2)");

        System.out.println("Expected:\n" + expected);

        System.out.println("Actual:\n" + actual);

        if (expected.equals(actual)) {

             System.out.println("Test PASSED\n");

        } else {

             System.out.println("Test FAILED\n");

        }

        expected = "+----+\n|    |\n|    |\n|    |\n|    |\n+----+";

        actual = makeSquare(6);

        System.out.println("makeSquare(6)");

        System.out.println("Expected:\n" + expected);

        System.out.println("Actual:\n" + actual);

        if (expected.equals(actual)) {

             System.out.println("Test PASSED\n");

        } else {

             System.out.println("Test FAILED\n");

        }

    }

    /**

    *

    * Produces a String starting and ending with the edge character and having

    * the inner char repeated in-between. The total number of characters in the

    * string is width. As an example makeLine('+', '-', 8) would return the

    * string "+------+".

    *

    * NOTE: This method is already completely implemented and must not be

    * modified for the assignment.

    *

    * @param edge

    *            The character used at the start and end of the returned

    *            string.

    * @param inner

    *            The character repeated in-between the edge char.

    * @param width

    *            The total number of characters in the returned string. Width

    *            must be greater or equal to 2.

    * @return A string with width characters.

    */

    public static String makeLine(char edge, char inner, int width) {

        String line = "";

        int currentLocation = 0;

        // Make the middle part of the line first.

        while (currentLocation < width - 2) {

             line = line + inner;

             currentLocation = currentLocation + 1;

        }

        // Add in the start and end character to the line.

        return edge + line + edge;

    }

    /**

    * Returns a string which, when printed out, will be a square shaped like

    * this, but of varying size (note - even though there are the same number

    * of characters side-to-side as up-and-down, the way text is drawn makes

    * this look not like a square. We will consider it a square.):

    *

    * <pre>

    * +-----+

    * |     |

    * |     |

    * |     |

    * |     |

    * |     |

    * +-----+

    * </pre>

    *

    * The returned string should consist of width lines, each ending with a

    * newline. In addition to the newline, the first and last lines should

    * begin and end with '+' and should contain width-2 '-' symbols. In

    * addition to the newline, the other lines should begin and end with '|'

    * and should contain width-2 spaces.

    *

    * A newline is a special character use to force one string to be on

    * multiple lines. System.out.println("Hi\nThere"); will produce output like

    * Hi There

    *

    * The '\n' character is a newline.

    *

    * The method does not print anything.

    *

    * The width parameter must be greater than or equal to 2.

    *

    * You should use while, if, and else statement.

    *

    * IMPLEMENTATION NOTE: For full credit (and for easier implementation),

    * make use of the makeLine method provided above in your implementation of

    * makeRectangle. You'll need to use a loop to call makeLine the correct

    * number of times.

    *

    * Replace this comment with your own Javadoc comment

    */

    public static String makeSquare(int width) {

        // assuming width >= 2 always

        // making a line with given width and has '+' on edges and '-' on inner,

        // assigning to a String

        String str = makeLine('+', '-', width);

        // looping for width-2 number of times

        for (int i = 0; i < width - 2; i++) {

             // making a line with given width and has '|' on edges and ' ' on

             // inner, appending to str preceeded by a newline

             str += "\n" + makeLine('|', ' ', width);

        }

        // making a line with given width and has '+' on edges and '-' on inner,

        // appending to str preceeded by a newline and returning it

        str += "\n" + makeLine('+', '-', width);

        return str;

    }

}

/*OUTPUT*/