XOREncryption/Java (Android compatible)/XOREncryption.java

public class XOREncryption {
	
	private static String encryptDecrypt(String input) {
		char[] key = {'K', 'C', 'Q'}; //Can be any chars, and any length array
		StringBuilder output = new StringBuilder();
		
		for(int i = 0; i < input.length(); i++) {
			output.append((char) (input.charAt(i) ^ key[i % key.length]));
		}
 		
		return output.toString();
	}
	
	public static void main(String[] args) {
		String encrypted = XOREncryption.encryptDecrypt("kylewbanks.com");
		System.out.println("Encrypted:" + encrypted);
		
		String decrypted = XOREncryption.encryptDecrypt(encrypted);
		System.out.println("Decrypted:" + decrypted);
	}
}