[java] One step check for null value & emptiness of a string

Answer 1

Commons library, StringUtils.isBlank() or StringUtils.isEmtpy().

isEmpty is equivalent to

s == null || s.length() == 0

isBlank is equivalent to

s == null || s.trim().length() == 0

Answer 2

In the jakarta commons there is a StringUtils.isEmpty(String).

Answer 3

try this

if(s){

}