Yuav ua li cas kho java.lang.nullpointerexception?
java.lang.nullpointerexception yog Java yuam kev uas tshwm sim thaum ib daim ntawv thov Java sim siv ib tug null es tsis txhob ntawm ib yam khoom. Lub RuntimeException yog txuas ntxiv los ntawm NullPointerException, uas yog chav kawm pej xeem. NullPointerException yog…