rename to distinguish btw number and word sorters

Sorting/NumberSelectionSorter.java

@@ -0,0 +1,21 @@
+package Sorting;
+
+public class NumberSelectionSorter extends NumberSorter {
+    //a class to sort an array of numbers using selection sort
+    public NumberSelectionSorter(RandomNumberFileReader reader){
+        super("selection sort", reader);
+    }
+
+    void sort(){
+        for(int i=0;i<numbers.length-1;i++){
+            int currentMinIndex = i;
+            for(int j=i+1;j<numbers.length;j++){
+                int comp = compare(numbers[currentMinIndex],numbers[j]);
+                if(comp>0){
+                    currentMinIndex = j;
+                }
+            }
+            swap(i,currentMinIndex);
+        }
+    }
+}