/**
   * Creates an integer random array with numbers in the interval [0; max].
   *
   * @param len length of the array.
   * @param max maximum random value.
   * @return the array
   */
  static int[] randomArray(int len, int max) {
    assert len >= 0;
    assert max >= 0;

    int[] result = new int[len];
    for (int i = 0; i < len; i++) result[i] = (int) (Math.random() * (max + 1));
    return result;
  }
    /**
     * Gives random available port in the given range.
     *
     * @param from if <=0 then default value 49152 is used
     * @param to   if <=0 then default value 65535 is used
     */
    protected int randomLocalPort(int from, int to){
        from = (from <=0) ? 49152 : from;
        to = (to <= 0) ? 65535 : to;


        while(true){
            int candidate = (int) ((Math.random() * (to-from)) + from);
            if(isFreePort(candidate)){
                return candidate;
            }
            System.out.println(String.format("Port %s is in use", candidate));
        }
    }
Esempio n. 3
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  private void scannerLoop() throws ParseException {
    Scanner reader = new Scanner(in);
    String line = reader.nextLine();
    while (!line.equals("startScheduling")) {
      String[] params = line.split("\\(|,( )*|\\)");
      switch (params[0]) {
        case "create":
          if (params.length == 4) {
            User temp = find(params[1]);
            if (temp == null) {
              User user =
                  new User(params[1], Integer.parseInt(params[2]), Boolean.parseBoolean(params[3]));
              users.add(user);
            } else {
              out.print("Error: user with this name already exist");
            }
          } else {
            out.print("Error: wrong arguments");
          }
          break;
        case "modify":
          if (params.length == 4) {
            User temp = find(params[1]);
            if (!(temp == null)) {
              temp.setName(params[1]);
              temp.setTimezone(Integer.parseInt(params[2]));
              temp.setStatus(Boolean.parseBoolean(params[3]));
            } else {
              out.print("Error: user with this name not found");
            }
          } else {
            out.print("Error: wrong arguments");
          }
          break;
        case "addEvent":
          if (params.length == 4) {
            User temp = find(params[1]);
            if (!(temp == null)) {
              Pattern pattern =
                  Pattern.compile(
                      "(0?[1-9]|[12][0-9]|3[01])\\.(0?[1-9]|1[012])\\.((19|20)\\d\\d)\\-([01]?[0-9]|2[0-3])\\:[0-5][0-9]\\:[0-5][0-9]");
              Matcher matcher = pattern.matcher(params[3]);
              if (matcher.matches()) {
                DateFormat df = new SimpleDateFormat("dd.MM.yyyy'-'HH:mm:ss");
                Date result = df.parse(params[3]);
                result.setTime(
                    result.getTime() + (defaultTimezone - temp.getTimezone()) * 3600 * 1000);
                Event event = new Event(result, params[2]);
                temp.addEvent(event);
              } else {
                out.print("Error: wrong dateformat");
              }
            } else {
              out.print("Error: user with this name not found");
            }
          } else {
            out.print("Error: wrong arguments");
          }
          break;
        case "addRandomTimeEvent":
          if (params.length == 5) {
            User temp = find(params[1]);
            if (!(temp == null)) {
              Pattern pattern =
                  Pattern.compile(
                      "(0?[1-9]|[12][0-9]|3[01])\\.(0?[1-9]|1[012])\\.((19|20)\\d\\d)\\-([01]?[0-9]|2[0-3])\\:[0-5][0-9]\\:[0-5][0-9]");
              Matcher matcherFrom = pattern.matcher(params[3]);
              Matcher matcherTo = pattern.matcher(params[4]);
              if (matcherFrom.matches() && matcherTo.matches()) {
                long dateFrom = Timestamp.valueOf(params[3]).getTime();
                long dateTo = Timestamp.valueOf(params[4]).getTime();
                long diff = dateFrom - dateTo + 1;

                Event event =
                    new Event(new Date(dateFrom + (long) (Math.random() * diff)), params[2]);
                temp.addEvent(event);
              } else {
                out.print("Error: wrong dateformat");
              }
            } else {
              out.print("Error: user with this name not found");
            }
          } else {
            out.print("Error: wrong arguments");
          }
          break;
        case "removeEvent":
          if (params.length == 3) {
            User temp = find(params[1]);
            if (!(temp == null)) {
              temp.removeEvent(params[2]);
            } else {
              out.print("Error: user with this name not found");
            }
          } else {
            out.print("Error: wrong arguments");
          }
          break;
        case "cloneEvent":
          if (params.length == 4) {
            User temp = find(params[1]);
            User tempTo = find(params[3]);
            if (!(temp == null) && !(tempTo == null)) {
              Event event = temp.findEvent(params[2]);
              tempTo.addEvent(event);
            } else {
              out.print("Error: user with this name not found");
            }
          } else {
            out.print("Error: wrong arguments");
          }
          break;
        case "showInfo":
          if (params.length == 2) {
            User temp = find(params[1]);
            if (!(temp == null)) {
              temp.showInfo();
            } else {
              out.print("Error: user with this name not found");
            }
          } else {
            out.print("Error: wrong arguments");
          }
          break;
      }
      line = reader.nextLine();
    }
  }