Update SelectionSort2.java (#184)

* Update SelectionSort2.java

Small method

* Update SelectionSort2.java

02_selection_sort/java/src/SelectionSort2.java

@@ -3,45 +3,23 @@ import java.util.Arrays;
 public class SelectionSort2 {
 
     // this version uses raw arrays instead of ArrayList
-    private static int[] selectionSort(int[] arr) {
+    public static void selectionSort(int[] target) {
-        int[] newArr = new int[arr.length];
+        for (int i = 0; i < target.length - 1; i++) {
-
+            int left = target[i];
-        for (int i = 0; i < newArr.length; i++) {
+            for (int j = i + 1; j < target.length; j++) {
-            int smallestIndex = findSmallest(arr);
+                int right = target[j];
-            newArr[i] = arr[smallestIndex];
+                if (left > right) {
-
+                    target[i] = right;
-            arr = getNewArrWithoutSmallest(arr, smallestIndex);
+                    target[j] = left;
-        }
+                    left = right;
-
+                }
-        return newArr;
-    }
-
-    private static int[] getNewArrWithoutSmallest(int[] arr, int smallestIndex) {
-        int[] newArrWithoutSmallest = new int[arr.length - 1];
-        for (int i = 0; i < arr.length; i++) {
-            if (i < smallestIndex) {
-                newArrWithoutSmallest[i] = arr[i];
-            } else if (i > smallestIndex) {
-                newArrWithoutSmallest[i - 1] = arr[i];
             }
         }
-        return newArrWithoutSmallest;
-    }
-
-    private static int findSmallest(int[] arr) {
-        int smallest = arr[0];
-        int smallestIndex = 0;
-        for (int i = 0; i < arr.length; i++) {
-            if (arr[i] < smallest) {
-                smallest = arr[i];
-                smallestIndex = i;
-            }
-        }
-        return smallestIndex;
     }
 
     public static void main(String[] args) {
         int[] arr = {5, 3, 6, 2, 10};
-        System.out.println(Arrays.toString(selectionSort(arr))); // [2, 3, 5, 6, 10]
+        selectionSort(arr);
+        System.out.println(Arrays.toString(arr)); // [2, 3, 5, 6, 10]
     }
 }