Merge pull request TheAlgorithms#1357 from astralcake/master

Fixed wrong order in BubbleSort, corrected spelling mistakes

Author: StepfenShawn

Sorts/BubbleSort.java

@@ -13,15 +13,15 @@ class BubbleSort implements SortAlgorithm {
      * This method implements the Generic Bubble Sort
      *
      * @param array The array to be sorted
-     *              Sorts the array in increasing order
+     *              Sorts the array in ascending order
      **/
 
     @Override
     public <T extends Comparable<T>> T[] sort(T[] array) {
         for (int i = 0, size = array.length; i < size - 1; ++i) {
             boolean swapped = false;
             for (int j = 0; j < size - 1 - i; ++j) {
-            	if (less(array[j], array[j + 1])) {
+            	if (greater(array[j], array[j + 1])) {
             		swap(array, j, j + 1);
             		swapped = true;
                 }
@@ -41,12 +41,12 @@ public static void main(String[] args) {
         BubbleSort bubbleSort = new BubbleSort();
         bubbleSort.sort(integers);
 
-        // Output => 231, 78, 54, 23, 12, 9, 6, 4, 1
+        // Output => 1, 4, 6, 9, 12, 23, 54, 78, 231
         print(integers);
 
         // String Input
         String[] strings = {"c", "a", "e", "b", "d"};
-        //Output => e, d, c, b, a
+        //Output => a, b, c, d, e
         print(bubbleSort.sort(strings));
 
     }

Sorts/SortUtils.java

@@ -26,19 +26,31 @@ static <T> boolean swap(T[] array, int idx, int idy) {
 
 
     /**
-     * This method checks if first element is less then the other element
+     * This method checks if first element is less than the other element
      *
      * @param v first element
      * @param w second element
-     * @return true if the first element is less then the second element
+     * @return true if the first element is less than the second element
      */
     static <T extends Comparable<T>> boolean less(T v, T w) {
         return v.compareTo(w) < 0;
     }
 
 
     /**
-     * Just print list
+     * This method checks if first element is greater than the other element
+     *
+     * @param v first element
+     * @param w second element
+     * @return true if the first element is greater than the second element
+     */
+    static <T extends Comparable<T>> boolean greater(T v, T w) {
+        return v.compareTo(w) > 0;
+    }
+
+
+    /**
+     * Prints a list
      *
      * @param toPrint - a list which should be printed
      */
@@ -55,7 +67,7 @@ static void print(List<?> toPrint) {
     /**
      * Prints an array
      *
-     * @param toPrint - the array  which should be printed
+     * @param toPrint - an array which should be printed
      */
     static void print(Object[] toPrint) {
         System.out.println(Arrays.toString(toPrint));