http://www.brainbaking.com/post/pseudocode/

sorting/java/src/be/brainbaking/lists/Lists.java

@@ -5,6 +5,10 @@ import java.util.stream.Collectors;
 
 public class Lists {
 
+    public static ListsWrapper exchange(int oneBasedA) {
+        return new ListsWrapper(oneBasedA);
+    }
+
     public static void swap(List<Integer> list, int oneBasedA, int oneBasedB) {
         int temp = list.get(oneBasedA - 1);
         list.set(oneBasedA - 1, list.get(oneBasedB - 1));

sorting/java/src/be/brainbaking/lists/ListsWrapper.java

@@ -0,0 +1,22 @@
+package be.brainbaking.lists;
+
+import java.util.List;
+
+public class ListsWrapper {
+
+    private final int oneBasedA;
+    private int oneBasedB;
+
+    public ListsWrapper with(int oneBasedB) {
+        this.oneBasedB = oneBasedB;
+        return this;
+    }
+
+    public void in(List<Integer> list) {
+        Lists.swap(list, oneBasedA, oneBasedB);
+    }
+
+    public ListsWrapper(int oneBasedA) {
+        this.oneBasedA = oneBasedA;
+    }
+}

sorting/java/src/be/brainbaking/sorting/QuickSort.java

@@ -6,6 +6,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import static be.brainbaking.lists.Lists.asString;
+import static be.brainbaking.lists.Lists.exchange;
 
 public class QuickSort implements Sortable {
 
@@ -68,11 +69,11 @@ public class QuickSort implements Sortable {
         for(int j = oneBasedStartIndex; j <= oneBasedEndIndex - 1; j++) {
             if(list.get(j - 1) <= x) {
                 i++;
-                Lists.swap(list, i, j);
+                exchange(i).with(j).in(list);
             }
         }
 
-        Lists.swap(list, i + 1, oneBasedEndIndex);
+        exchange(i + 1).with(oneBasedEndIndex).in(list);
         System.out.println("partitioned: " + asString(list));
         return i + 1;
     }