Java By Comparison

Favor For-Each Over For Loops

class LaunchChecklist {

    List<String> checks = Arrays.asList("Cabin Pressure",
                                        "Communication",
                                        "Engine");

    Status prepareForTakeoff(Commander commander) {
        for (int i = 0; i < checks.size(); i++) {
            boolean shouldAbortTakeoff = commander.isFailing(checks.get(i));
            if (shouldAbortTakeoff) {
                return Status.ABORT_TAKE_OFF;
            }
        }
        return Status.READY_FOR_TAKE_OFF;
    }
}

There are many ways to iterate over a data structure. The one that beginners are usually taught isn’t exactly the best one.

The code here shows an iteration on a data structure, a List named checks. It uses a for loop and iterates over checks using an index variable i.

This is a very traditional way of iterating, ...