BPI inside

Tag: ObjectUtils

  • Java Tip #11: Use ObjectUtils.toString() for an implicit null-check and default value

    Another quick addition to my Java Tips series. This instance deals again with adding some safety while reducing a bit of code clutter.

    Advice

    Use Commons ObjectUtils.toString() instead of directly calling toString() on an object if it may be null. This also allows for a alternate result if the object is null.

    Code-Example

    Before

    final String projectId = (request.getParameter("projectid") != null) ? request.getParameter("projectid").toString() : "";
final String roleId = (request.getParameter("roleid") != null) ? request.getParameter("roleid")
        .toString() : "DEFAULT";

    After

    final String projectId = ObjectUtils.toString(request.getParameter("projectid"));
final String roleId = ObjectUtils.toString(request.getParameter("roleid"), "DEFAULT");

    Benefit

    Readability gain. Safety gain, as ObjectUtils methods are null-safe. The reduced code footprint eases recognition of the intention, which is even more significant if there should be a default text if the object instance is indeed null.

    Remarks

    None.