java.lang.NumberFormatException: For input string: “null”

Question

I\'m parsing a doc and I get the following error:

Exception in thread \"main\" java.lang.NumberFormatException: For input string: \"null\"
    at sun.misc.Fl         


        

Answer 1

The parseInt() and parseDouble() will error with NFE if passed with a null, space or blank string value. Once you have handled the null condition it will still fail with an empty string. Try adding a zero before the empty string like below. It maintains the integrity of calc as well:

Integer.parseInt(" ".trim())

to

Integer.parseInt( "0" + " ".trim())