How do I correctly implement PageFactory annotations within Selenium?
You have an error in your syntax:
@FindBy(css = "#Rabo_SelectedBatchSLTransactionrow0 > * > [type = 'checkbox']") public WebElement firstAlertCheckboxSelected();
firstAlerchCheckboxSelected is NOT a method. It's a variable.
Change it to:
@FindBy(css = "#Rabo_SelectedBatchSLTransactionrow0 > * > [type = 'checkbox']") public WebElement firstAlertCheckboxSelected;