Crypto/src/ROT13.java

-import static java.lang.Character.isLowerCase;
-import static java.lang.Character.isUpperCase;
-import static java.lang.Character.toLowerCase;
-
-public class ROT13  {
+public class ROT13 {
+    private int shift;
 
     ROT13(Character cs, Character cf) {
+        this.shift = cs - cf;
     }
 
     ROT13() {
+        this.shift = 13;
     }
-
-
-    public String crypt(String text) throws UnsupportedOperationException {
-
-        return "";
+     /*   * ROT13 - take the 26 letters of the alphabet and create a `String <- crypt(String)` method in the ROT13 class
+        * crypt("Why did the chicken cross the road?") should produce
+                "Jul qvq gur puvpxra pebff gur ebnq?"
+        * crypt("Gb trg gb gur bgure fvqr!") should produce "To get to the other side!"
+        * Make a constructor that takes two arguments to set the cipher correspondence. `ROT13 superSecure = new ROT13("a","m");`
+        * this defines the SHIFT of the two Character arrays.
+        * Caesar - make a subclass of ROT13 that implements the famous caesar cipher.
+        * Create you own cipher, using a different set of */
+
+     public String crypt(String text) throws UnsupportedOperationException {
+        StringBuilder builder = new StringBuilder();
+        char[] chars = text.toCharArray();
+        for (int i = 0; i < chars.length; i++) {
+            char c = text.charAt(i);
+            if (c >= 'a' && c <= 'm') {
+                c += 13;
+            } else if (c >= 'A' && c <= 'M') {
+                c += 13;
+            } else if (c >= 'n' && c <= 'z') {
+                c -= 13;
+            } else if (c >= 'N' && c <= 'Z') {
+                c -= 13;
+            }
+            builder.append(c);
+        }
+        return builder.toString();
     }
 
     public String encrypt(String text) {
-        return text;
+        return crypt(text);
     }
 
     public String decrypt(String text) {
-        return text;
+        return crypt(text);
     }
 
     public static String rotate(String s, Character c) {
-
-        return "";
+        String sub = s.substring(0, s.indexOf(c));
+        String sub1 = s.substring(s.indexOf(c));
+        return sub1.concat(sub);
     }
-
 }

Crypto/src/ROT13Test.java

 import org.junit.Test;
-
 import static org.junit.Assert.*;
 
 public class ROT13Test {
 
-
     @Test
     public void rotateStringTest0() {
         // Given
         // Then
         assertTrue(actual.equals(Q1));
     }
-
 }

SimpleCrypt.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/Crypto/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+  </component>
+</module>

pom.xml

     <groupId>com.zipcodewilmington</groupId>
     <artifactId>SimpleCrypt</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>RELEASE</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
 
 
 </project>