Can we rely on String.isEmpty for checking null condition on a String in Java?

Question

I am passing an accountid as input from an XML file as shown, which will be parsed later and will be used in our code:

123456         


        

Answer 1

Use StringUtils.isEmpty instead, it will also check for null.

Examples are:

 StringUtils.isEmpty(null)      = true
 StringUtils.isEmpty("")        = true
 StringUtils.isEmpty(" ")       = false
 StringUtils.isEmpty("bob")     = false
 StringUtils.isEmpty("  bob  ") = false

See more on official Documentation on String Utils.