ADDITIONAL SYSTEM INFORMATION :
Multiple Linux OS. Multiple Java implementations, Multiple Java versions from 8 to 21.

A DESCRIPTION OF THE PROBLEM :
Documentation for isWhitespace() indicates that Character.PARAGRAPH_SEPARATOR is considered whitespace. However, on all systems tested the line

System.out.println("PARAGRAPH_SEPARATOR is white space? " + Character.isWhitespace(Character.PARAGRAPH_SEPARATOR));

Always prints "false"

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Execute System.out.println("PARAGRAPH_SEPARATOR is white space? " + Character.isWhitespace(Character.PARAGRAPH_SEPARATOR));

ACTUAL -
false

---------- BEGIN SOURCE ----------
public class Test {
    public static void main(String[] args) {
        System.out.println("PARAGRAPH_SEPARATOR is white space? " + Character.isWhitespace(Character.PARAGRAPH_SEPARATOR));
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
creating a static isWhitespace that adds the test for PARAGRAPH_SEPARATOR after call to Character.isWhitespace.

FREQUENCY : always