had no clue what I was doing

src/main/java/io/zipcoder/Iteration.java

@@ -0,0 +1,21 @@
+package io.zipcoder;
+
+public class Iteration {
+
+//Do it using a map like in the directions
+
+
+    public String replaceUsingIteration(String rawData,String map, char replaceWith){
+        StringBuilder buildString = new StringBuilder(rawData);
+        String toReturn = rawData;
+        for(int i = 0; i < toReturn.length(); i++){
+            for(int j = 0; j < map.length(); j++){
+                if(toReturn.charAt(i) == map.charAt(j)){
+//                   toReturn.replace(toReturn.charAt(i), replaceWith);
+                    buildString.setCharAt(i, replaceWith);
+                }
+            }
+        }
+        return buildString.toString();
+    }
+}

src/main/java/io/zipcoder/Problem1.java

@@ -1,4 +1,5 @@
 package io.zipcoder;
 
 public class Problem1 {
+
 }

src/main/java/io/zipcoder/Recursion.java

@@ -0,0 +1,6 @@
+package io.zipcoder;
+
+public class Recursion {
+
+
+}

src/test/java/io/zipcoder/IterationTest.java

@@ -0,0 +1,21 @@
+package io.zipcoder;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class IterationTest {
+
+    String rawData = "‘f’ : ‘7’, ‘s’:’$’, ‘1’:’!’, ‘a’.:’@’";
+    String map = "f7s$1!a@";
+    char toReplaceWith = 'D';
+
+    @Test
+    public void replaceIterationTest(){
+        String expected = "";
+        Iteration iteration = new Iteration();
+
+        String actual = iteration.replaceUsingIteration(rawData, map, toReplaceWith);
+
+        Assert.assertEquals(expected, actual);
+    }
+}