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 Tools and Libs > Commons Lang3 > Strings > Is Numeric

Is Numeric 

Apache Commons Lang 3.0 is a java library with lot of utilities and reusable components. This requires the library commons-lang3-3.0.1.jar to be in classpath. The following example shows using StringUtils.isNumeric() API. It returns TRUE if the given string contains only numeric characters.

File Name  :  
com/bethecoder/tutorials/commons_lang/tests/strings/IsNumericTest.java 
Author  :  Sudhakar KV
Email  :  [email protected]
   
package com.bethecoder.tutorials.commons_lang.tests.strings;

import org.apache.commons.lang3.StringUtils;

public class IsNumericTest {

  /**
   @param args
   */
  public static void main(String[] args) {
         
    System.out.println(StringUtils.isNumeric(null));
    System.out.println(StringUtils.isNumeric(""));
    System.out.println(StringUtils.isNumeric("be the coder"));
    System.out.println(StringUtils.isNumeric("1234"));
    System.out.println(StringUtils.isNumeric("1234.45"));
  }

}
   

It gives the following output,
false
false
false
true
false



 
  


  
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