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 Tools and Libs > Jodd > Strings > How to check if a string contains only white spaces

How to check if a string contains only white spaces 

Jodd is an open-source java library with lot of reusable components and feature rich utilities. This requires the library jodd-3.3.2.jar to be in classpath. The following example shows how to verify whether the given string contains only white spaces using StringUtil.containsOnlyWhitespaces() API.

File Name  :  
com/bethecoder/tutorials/jodd/utils/StringContainsWhiteSpacesTest.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.jodd.utils;

import jodd.util.StringUtil;

public class StringContainsWhiteSpacesTest {

  /**
   @param args
   */
  public static void main(String[] args) {
    System.out.println(StringUtil.containsOnlyWhitespaces(""));
    System.out.println(StringUtil.containsOnlyWhitespaces("  "));
    System.out.println(StringUtil.containsOnlyWhitespaces("\n\n     \n\n"));
    System.out.println(StringUtil.containsOnlyWhitespaces("    \t\t    "));
    System.out.println(StringUtil.containsOnlyWhitespaces("ABCD"));
    System.out.println(StringUtil.containsOnlyWhitespaces("a b c d"));
  }

}
   

It gives the following output,
true
true
true
true
false
false


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