Check whether a string is not null and not empty

Question

How can I check whether a string is not null and not empty?

public void doStuff(String str)
{
    if (str != null && str != \"**here I want to check          


        

Answer 1

You should use org.apache.commons.lang3.StringUtils.isNotBlank() or org.apache.commons.lang3.StringUtils.isNotEmpty. The decision between these two is based on what you actually want to check for.

The isNotBlank() checks that the input parameter is:

• not Null,
• not the empty string ("")
• not a sequence of whitespace characters (" ")

The isNotEmpty() checks only that the input parameter is

• not null
• not the Empty String ("")