"Iterate almost working"

pom.xml

@@ -18,4 +18,9 @@
         </dependency>
 
     </dependencies>
+
+    <properties>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.source>1.8</maven.compiler.source>
+    </properties>
 </project>

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

@@ -1,4 +1,34 @@
 package io.zipcoder;
 
+import java.util.HashMap;
+import java.util.Set;
+
 public class Problem1 {
+
+    String encodeIterate (String raw, HashMap<Character, Character> cypher){
+        Set<Character> keyChars = cypher.keySet();
+        for (Character keyChar :
+                keyChars) {
+            raw = raw.replace(keyChar, cypher.get(keyChar));
+        }
+        return raw;
+    }
+
+    public String encodeRecursive (String raw, HashMap<Character, Character> cypher){
+        return encodeRecursive(raw, cypher, 0);
+
+    }
+
+    private String encodeRecursive (String raw, HashMap<Character, Character> cypher, int index){
+        Character keyChar = raw.charAt(index);
+        if(cypher.containsKey(keyChar)) {
+            raw = raw.replace(keyChar, cypher.get(keyChar));
+        }
+        if(index == raw.length()-1) {
+            return raw;
+        } else {
+            index++;
+            return encodeRecursive(raw, cypher, index);
+        }
+    }
 }

src/test/java/io/zipcoder/Problem1Test.java

@@ -1,4 +1,38 @@
 package io.zipcoder;
 
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+
 public class Problem1Test {
+
+    private HashMap<Character, Character> cypher = new HashMap<Character, Character>(){{
+        put('f', '7');
+        put('s', '$');
+        put('1', '!');
+        put('a', '@');
+    }};
+
+    @Test
+    public void encodeIterateTest(){
+        Problem1 problem1 = new Problem1();
+        String raw = "The Farmer went to the store to get 1 dollar’s worth of fertilizer";
+
+        String expected = "The F@rmer went to the $tore to get ! doll@r’$ worth o7 7ertilizer";
+        String actual = problem1.encodeIterate(raw, cypher);
+
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void encodeRecursiveTest(){
+        Problem1 problem1 = new Problem1();
+        String raw = "The Farmer went to the store to get 1 dollar’s worth of fertilizer";
+
+        String expected = "The F@rmer went to the $tore to get ! doll@r’$ worth o7 7ertilizer";
+        String actual = problem1.encodeRecursive(raw, cypher);
+
+        Assert.assertEquals(expected, actual);
+    }
 }