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.
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-lang
package, refer to the Maven Repository.
You can import the NumberUtils
class as follows:
import org.apache.commons.lang3.math.NumberUtils;
public static boolean isParsable(final String str)
final String str
: The string to check.This method returns true
if the string is parsable. Otherwise, it returns false
.
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();}}
The output of the code will be as follows:
NumberUtils.isParsable(234.323232232) = true
NumberUtils.isParsable(0xABED) = false
string = 234.323232232
The method returns true
because the string is parsable.
string = 0xABED
The method returns false
because the string is a hexadecimal value and hexadecimal values are not supported.