public static int checkRowForSameness(int[][] matrix, int i) {
		  int testValue = matrix[i][0];
	        // If all values in row i are the same, then return that value.
	        // Otherwise, return -1.
	        for (int j = 1; j < matrix[i].length; j++) {
	          if (testValue != matrix[i][j]) {
	                return -1;
	          }
	        }

	        return matrix[i][0];
	  }

	  public static void rowChecks(int[][] matrix) {
	        // Check which rows have all of the same entries.
	        // Display a message for each such row.
	        // Display a different message if none of the rows
	        // have all the same entries.
	        // Precondition:  none of the entries are -1.
	        for (int i = 0; i < matrix.length; i++) {
	          //Call checkRowForSameness
	          int rowSame = checkRowForSameness(matrix, i);
	          if (rowSame == -1) {
	                System.out.println("Not same numbers on row " + i);
	          }
	          else if (rowSame == 1) {
	                System.out.println("All 1s on row " + i);
	          }
	          else {
	                System.out.println("All 0s on row " + i);
	          }
	        }
	  }