lots of exercises in java... from https://github.com/exercism/java

RotationalCipher.java 330B

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  1. class RotationalCipher {
  2. RotationalCipher(int shiftKey) {
  3. throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
  4. }
  5. String rotate(String data) {
  6. throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
  7. }
  8. }