Keep your code readable

Sorry but I still don't get it ....

public void doSomething(Vector items) {
    int j = 0;
    while (j < items.size()) {
      // 50 lines of code
      if (0 == j && 1 < items.size()) {
        break;
      }
      // 50 lines of code
      j += (j + 1) == items.size() && 1 < items.size() ? -j : 1;
    }
  }