why i'm getting lang.string.NumberFormatException for input string ""

[prasanna ganesh]

why i'm getting lang.string.Num berFormatExcept ion for input string ""please help me to find solution

[ThatThatGuy]

assigning a string value to a numeric variable will definately raise this kind of exceptions.... eithier you parse the string value to a int or float or any numeric value...

like you can do something like this:
Integer ans=Integer.par seInt("5215");