/* * This program determines if all integer elements in a two-dimensional array are identical * * For example, in the 2D array ( 3 rows X 4 columns) : * * 7 7 7 7 * 7 7 7 7 * 7 7 7 7 * * all elements are equal to 7 * * In the 2D array (3 rows X 2 columns): * * 3 3 * 3 5 * 3 3 * * one element is 5 and the others are 3 therefore the array is not all equal */ public class AllEqual2D { /** Determines if all integer elements in a two-dimensional array are identical @param values two-dimensional array to be examined @return true if all values identical, false otherwise */ public static boolean equalValues(int[][] values) { boolean ok = true; //-----------Start below here. To do: approximate lines of code = 1 // Declare an int variable called elem and initialize it to values[0][0];

//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.

//-----------Start below here. To do: approximate lines of code = 6 // Use a nested for loop (i.e. two for loops, one inside the other) that goes through // each integer element stored in the 2D array values[][] and compares each to elem // As soon as one comparison is false then return false. If all comparisons are true then // the loops finish and outside of the nested loops, return true. // Hint: values.length stores the number of rows in the 2D array, values[i].length stores the // number of elements in row i return false;//ok = false; //-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions. }

public static void main(String[] args) { int[][] array1 = { {0, 4, 5}, {2, 4, 9}, {0, 2, 7}, {7, 3, 6} }; int[][] array2 = { {4, 4, 4}, {4, 4, 4}, {4, 4, 4}, {4, 4, 4} };

if (equalValues(array1)) { System.out.println("All values in array1 are identical"); } if (equalValues(array2)) { System.out.println("All values in array2 are identical"); } System.out.println("Expected: All values in array2 are identical"); } }