Added check for union and length

Bachelor_application.iml

src/main/java/com/application/DB/HelpingFunctions.java

...ain/java/com/application/GUI/PopUpWindows/InputPopup.java

...ain/java/com/application/GUI/PopUpWindows/LoginPopup.java

...in/java/com/application/GUI/PopUpWindows/OutputPopup.java

target/classes/com/application/DB/HelpingFunctions.class

...classes/com/application/GUI/PopUpWindows/InputPopup.class

...classes/com/application/GUI/PopUpWindows/LoginPopup.class

...lasses/com/application/GUI/PopUpWindows/OutputPopup.class