Java – what are the disadvantages of writing! string. isEmpty()？

In if statements in Java code, I often read if (string! = null & & string. Isempty() = = false) and so on I am used to writing if (string! = null & &! String. Isempty())

use! string. What are the disadvantages of isempty()?

Solution

In terms of behavior

if(string != null && string.isEmpty() == false)

and

if(string != null && !string.isEmpty())

Obviously the same I prefer the latter because it is more concise When possible, I prefer to actively express conditions, but unfortunately there is no string Isnotempty() method

So generally speaking, when I want to check whether the string is null or empty (in a null safe way), I use:

StringUtils.isNotBlank(string)

This stringutils class comes from the Apache commons Lang library, but if you don't have this on the classpath and don't want to add it, you can easily write your own class