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In Java How to Check String Is Null?

Robert Thorne • • 6 min read
In Java How to Check String Is Null?

Given a string str, the task is to check if this string is null or not, in Java.
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Approach:
  1. Get the String to be checked in str.
  2. We can simply compare the string with Null using == relational operator. Syntax: if(str == null)
  3. Print true if the above condition is true. Else print false.

How do you check if a string is null?

You can use the IsNullOrWhiteSpace method to test whether a string is null , its value is String. Empty, or it consists only of white-space characters.

How do I check if a string is null in Java 8?

In this tutorial, we'll look at how to check if a String is Null, Empty or Blank in Java:
  1. Using the Length of the String.
  2. Using the String. isEmpty() Method.
  3. Using the String. equals() Method.
  4. Using the StringUtils Class.
Robert Thorne
Author

Robert Thorne

Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.