In Java How to Check String Is Null?

Robert Thorne
Robert Thorne
• • 6 min read

Given a String Str, the Task Is to Check If This String Is Null or Not, in Java. .. .Approach: Get the String to Be Checked in Str. We Can Simply Compare the...

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.
...
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.

Must Read

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

Robert Thorne

Automotive & Future Transportation Editor
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Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.