Java By Comparison

Favor Logging Over Console Output

class LaunchChecklist {

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

    Status prepareAscend(Commander commander) {
        System.out.println("Prepare ascend");
        for (String check : checks) {
            if (commander.isFailing(check)) {
                System.out.println(check + " ... FAILURE");
                System.err.println("Abort take off");
                return Status.ABORT_TAKE_OFF;
            }
            System.out.println(check + " ... OK");
        }
        System.out.println("Read for take off");
        return Status.READY_FOR_TAKE_OFF;
    }
}

When you’re lucky, you can find errors in your code just by looking at it. But oftentimes, this isn’t enough and you have to run the code and investigate the memory to spot ...