Identifying Whitespace Characters with isWhitespace() Method in Java: A Comprehensive Guide

Description

The method determines whether the specified char value is a white space, which includes space, tab, or new line.

Method Syntax

public static boolean isWhitespace(char ch)

Method Argument

Data Type	Parameter	Description
char	ch	the character to be tested. Primitive character type.

Method Returns

This method returns true, if the passed character is really a white space.

Compatibility

Requires Java 1.1 and up

Example

Below is a simple java example on the usage of isWhitespace(char ch) method of Character class.

public class MethodisWhitespace {

   public static void main(String args[]) {
      System.out.println(Character.isWhitespace('d'));
      System.out.println(Character.isWhitespace(' '));
      System.out.println(Character.isWhitespace('\n'));
      System.out.println(Character.isWhitespace('\t'));
   }
}

output

Below is the sample output when you run the above example.

false
true
true
true
Press any key to continue . . .

Example

Below is a simple java example on the usage of isWhitespace(char ch) method of Character class.

import java.util.Scanner;

/*
 * This example source code demonstrates the use of
 * isWhitespace(char ch) method of Character class.
 */

public class CharacterIsWhiteSpaceChar  {

	public static void main(String[] args) {

		// Ask for user input
		System.out.print("Enter an input:");

		// use scanner to get the user input
		Scanner s = new Scanner(System.in);

		// gets the user input
		char[] value = s.nextLine().toCharArray();

		// close the scanner object
		s.close();

		// check if user input is white space
		for (char ch : value) {
			boolean result = Character.isWhitespace(ch);
			// print the result
			System.out.println("character " + ch
					+ " is a white space? " + result);
		}

	}

}

output

Below is the sample output when you run the above example.

Enter an input:s
character s is a white space? false
Press any key to continue . . .


Enter an input:
character   is a white space? true
Press any key to continue . . .