StringUtils.isBlank

• This function returns true if the string contains null,empty or whiteSpace.Where as isEmpty returns true for null & empty.
• This function is null safe
• You can use this method with the help of commons-lang-2.6.jar.
• You can download this jar by using the below link

     http://mvnrepository.com/artifact/commons-lang/commons-lang/2.6

1. package com.utilitySample;
2. import org.apache.commons.lang.StringUtils;
3. 
   
4.  public class StringUtility {
5. public static void main(String[] args) {
6.                  System.out.println(StringUtils.isBlank(null));
7. System.out.println(StringUtils.isBlank(""));
8. System.out.println(StringUtils.isBlank(" "));
9. System.out.println(StringUtils.isBlank("vel"));
10. System.out.println(StringUtils.isBlank("  vel "));
11.    }
12.  }

 Output : 

  true

  true

  true

  false

  false