One step check for null value & emptiness of a string

Question

I have a setter method.

Then when another (say generate) method is run, I need to check the value of my fields. So in the case of String property, I need to know if

Answer 1

Add maven dependency for com.google.guava

Then in your code:

import com.google.common.base.Strings;

if(!Strings.isNullOrEmpty(s)) {
  // Do stuff here
}

Answer 2

if(s != null && !s.isEmpty()){
// this will work even if 's' is NULL
}

Answer 3

try this

if(s){

}

Answer 4

use org.apache.commons.lang.StringUtils, the method StringUtils.isNotBlank check both nullity and emptiness.

Answer 5

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 6

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