logo
down
shadow

StringUtils.isBlank return false for null Strings


StringUtils.isBlank return false for null Strings

By : Nelson
Date : December 01 2020, 05:00 PM
it helps some times I also had this problem and found the trick just after saw the source code of String.valueof(). The source code of String.valueof() is below.
code :
public static String valueOf(Object obj) {
    return (obj == null) ? "null" : obj.toString();
}


Share : facebook icon twitter icon
StringUtils.isBlank vs. Regexp

StringUtils.isBlank vs. Regexp


By : Jason Spontie
Date : March 29 2020, 07:55 AM
help you fix your problem Yes, StringUtils.isBlank(..) will do the same thing, and is a better way to go. Take a look at the code:
code :
public static boolean isBlank(String str) {
     int strLen;
     if ((str == null) || ((strLen = str.length()) == 0))
         return true;
     int strLen;
     for (int i = 0; i < strLen; ++i) {
        if (!(Character.isWhitespace(str.charAt(i)))) {
           return false;
        }
     }
   return true;
}
Differences between null and StringUtils.isBlank()

Differences between null and StringUtils.isBlank()


By : user3807122
Date : March 29 2020, 07:55 AM
Hope that helps If you expect any data that is not null to be a String then this.text.getData() != null might work but your code will later on have a class cast problem and the fact that the cast to String is not working shows a deeper problem.
If it is OK for 'data' to be some object of some type, then StringUtils is simply not the right solution and the Null-check is the right thing to do!
isBlank method to test string without space StringUtils.isBlank(" ") = false;

isBlank method to test string without space StringUtils.isBlank(" ") = false;


By : Hetang Shah
Date : March 29 2020, 07:55 AM
I wish this helpful for you The StringUtils class is from Apache Commons lang. The latest version is available from Maven Central. You can download it here.
why my StringUtils class doesn't have isBlank()

why my StringUtils class doesn't have isBlank()


By : user2568994
Date : March 29 2020, 07:55 AM
With these it helps The library you want to use is the org.apache.commons.lang.StringUtils and you have to add it to your classpath manually or add it as a dependency to your gradle configuration or any other build tool you are using.
IntelliJ does not know the library out of the box as it is not part of the JDK.
Apache's StringUtils.isBlank(str) vs. Guava's Strings.isNullOrEmpty(str): Should you routinely check for whitespace?

Apache's StringUtils.isBlank(str) vs. Guava's Strings.isNullOrEmpty(str): Should you routinely check for whitespace?


By : allusione
Date : March 29 2020, 07:55 AM
hope this fix your issue If you want to use Guava to replicate the isBlank behaviour, I would use the following method instead:
Strings.nullToEmpty(str).trim().isEmpty()
Related Posts Related Posts :
  • My shape moved but will pause for a while
  • How to solve syntax error in eclipse Mars.1
  • Shibboleth idp configuration for ldap authentication
  • Do something when app starts?
  • Android Runtime Exception font asset not found
  • How to query using objectify in Google App Engine app
  • List value is printing address instead of value
  • Sent parameter through PATCH android
  • i am not able to clear the code below given using throwable concept in java
  • How to get System time instead of Server time in java?
  • How to push json data into an arrya object in MONGO DB by java
  • Saving RelationshipEntity not working
  • Error on "instanceOf" when checking a subClass
  • Java - Splitting a image into 4 images
  • "Pinging" a server in Java
  • RoboGuice Proguard CreationException
  • Android Array list returns Null after adding values
  • Jar Executable what am I doing wrong?
  • How do I mitigate Connection leak triggered for connection com.mysql.jdbc.JDBC4Connection@11d08960,
  • How do i iterate values from a 2d array using conditions
  • Hide Button in CustomPagerAdapter
  • Java GC: does it ever make sense to call super.finalize() in a class that only extends Object?
  • 64bit HashMap in Java
  • Hibernate wildcard query on two columns
  • Want to Generate Auto Login Program Using Java
  • Spring security Oauth 2 with ajax login and form login
  • Parse findInBackground doesn't add to global arraylist?
  • Remove random item from ArrayList
  • in SpringMVC getMessage from i18n properties in a function outside the controller
  • How do I add JCheckBox next to each name that has been entered into an arraylist from a JTextField?
  • Return node ID along with complete node
  • InvocationTargetException. Cannot cast class X to class X. When invoked in Scala Imain through spark-submit
  • how to print elements of a 1D array into a N x N box
  • How to map csv file to pojo class in java
  • How, in Java, to encode default vhost %2F in URL/URI so it doesn't get changed to slash and fail to work
  • Tomcat 5.5 https configuration in Windows Server 2008 64bit
  • Enabling FIPS 140-2 compliance mode in MULE ESB
  • How to pass String PackageName to PkgName under parseXML() and run XMLParser class as a new activity when click on list
  • Error while creating spring -hibernate configuration file
  • Hand off control between java threads
  • NoClassDefFoundError: scala/collection/Seq
  • Getting stack overflow error on one machine but not the other on the same code
  • How can I loop AsyncAjaxRequest in GWT?
  • Failed to find provider info for urbanairship.provider
  • Android ListView Adapter Crash issue/Duplicates
  • Displaying Splash screen only once on user preference
  • Loop List<WebElement> doesn't stop despite no more WebElements
  • Check if pattern exists in a String
  • Swing - Key Problems (Arrow Keys, Tab, etc.) in GUIs with TextComponents
  • Why the solution for binary search tree validity is not working?
  • Double encrypting 2048 RSA?
  • create junit test for runnable class
  • Unable to read and sort information from a text file in Java
  • My device isn't getting detected in android studio (driver issue)
  • Representing a Graph in Java
  • How to XML mapping using jxls
  • Quick Sort stackoverflow error for large arrays
  • Parsing Apache Tika XML Output returns Unknown Tag
  • java simple UI loop, can't find bug
  • how to use greater than and less than in a single if statement in java
  • shadow
    Privacy Policy - Terms - Contact Us © animezone.co