What is NumberUtils.isParsable in Java?
isParsable() is a NumberUtils class that is used to check if the given string is parsable to a number or not.
Hexadecimal and scientific notations are not considered parsable.
How to import NumberUtils
The definition of NumberUtils can be found in the Apache Commons Lang package, which we can add to the Maven project by adding the following dependency to the pom.xml file:
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
For other versions of the
commons-langpackage, refer to the Maven Repository.
You can import the NumberUtils class as follows:
import org.apache.commons.lang3.math.NumberUtils;
Syntax
public static boolean isParsable(final String str)
Parameters
final String str: The string to check.
Return value
This method returns true if the string is parsable. Otherwise, it returns false.
Code
import org.apache.commons.lang3.math.NumberUtils;public class Main{public static void main(String[] args){// Example 1String valueToConvert = "234.323232232";System.out.printf("NumberUtils.isParsable(%s) = %s", valueToConvert, NumberUtils.isParsable(valueToConvert));System.out.println();// Example 2valueToConvert = "0xABED";System.out.printf("NumberUtils.isParsable(%s) = %s", valueToConvert, NumberUtils.isParsable(valueToConvert));System.out.println();}}
Output
The output of the code will be as follows:
NumberUtils.isParsable(234.323232232) = true
NumberUtils.isParsable(0xABED) = false
Example 1
string = 234.323232232
The method returns true because the string is parsable.
Example 2
string = 0xABED
The method returns false because the string is a hexadecimal value and hexadecimal values are not supported.