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Nov 19th, 2017
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  1.  
  2. public class blatt4_ha4_8 extends MiniJava {
  3. public static void main(String... args) {
  4. int key = read("Bitte einen Schlüssel eingeben:");
  5. while ( key < 0 || key > 63 ) {
  6. write(" Ungültige Zahl. Bitte um erneute Eingabe:");
  7. key = read("Schlüssel:");
  8. }
  9.  
  10. int initVector = read("Bitte einen Init.vektor eingeben:");
  11. while ( initVector < 0 || initVector > 63) {
  12. write(" Ungültige Zahl. Bitte um erneute Eingabe:");
  13. initVector = read("Init.vektor:");
  14. }
  15.  
  16. String text = readString("Bitte zu verschlüsselten Text eingeben:");
  17.  
  18. for (int counter = 0; counter < text.length(); counter++) {
  19. if(!Character.isLetter(text.charAt(counter)) || !Character.isDigit(text.charAt(counter)) || text.charAt(counter) != '.' || text.charAt(counter) != ' ') {
  20. write("Fehler. Ungültiges Zeichen!");
  21. }
  22. }
  23. }
  24. }
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