Final commit.

src/AssessmentPartThree.java

@@ -14,21 +14,22 @@ public class AssessmentPartThree {
 	public char enryptedCharacter(char theChar, int theOffset) {
 		char returnChar = theChar;
 		int x = 0;
-		String alphabet = "abcdefghijklmnopqrstuvwxyz"; 
+		String alphabet = "abcdefghijklmnopqrstuvwxyz"; //String containing all the letters of the alphabet.
 		if (Character.isUpperCase(theChar)) {
-			alphabet = alphabet.toUpperCase();
+			alphabet = alphabet.toUpperCase(); //If the character is a capital letter then the alphabet string
+			                                   //becomes upper case to match.
 		}
-		for (int i = 0; i < alphabet.length(); i++) {
+		for (int i = 0; i < alphabet.length(); i++) { //Increments through every letter of the alphabet.
 			char character = alphabet.charAt(i);
-			if (character == theChar) {
-				x = i + theOffset;
+			if (character == theChar) { //if that letter of the alphabet is the same as the character then..
+				x = i + theOffset; //that character is then moved by the offset.
 				if (x > 26) {
-					x = (x - 26);
+					x = (x - 26); // if the offset goes outside of the alphabet then it loops back round the the start.
 				}
 				if (x < 0) {
-					x = (x + 26);
+					x = (x + 26); // if the offset goes backwards lower than A then it loops to the end of the alphabet.
 				}
-				returnChar = alphabet.charAt(x);
+				returnChar = alphabet.charAt(x); //Returns the encrypted character.
 			}
 		}
 
@@ -45,13 +46,14 @@ public class AssessmentPartThree {
 	public String encryptedString(String theMessage, int theOffset) {
 
 		String alphabet = "abcdefghijklmnopqrstuvwxyz";
-		String codedString = "";
-		char[] theMessageChars = theMessage.toCharArray();
+		String codedString = ""; //Sets up an empty string to be filled later.
+		char[] theMessageChars = theMessage.toCharArray(); //Converts theMessage to a character array.
 		int x = -1;
-		for (int i = 0; i < theMessage.length(); i++) {
+		for (int i = 0; i < theMessage.length(); i++) { //Increments through theMessage character by character.
 			char character = theMessage.charAt(i);
 
-			codedString += enryptedCharacter(character, theOffset);
+			codedString += enryptedCharacter(character, theOffset); //recalls the previous method to encrypt each character
+			                                              //and then adds those characters into the empty string and returns the encrypted message.
 
 		}
 		return codedString;