What is NumberUtils.toByte() in Java?

toByte() is a staticthe methods in Java that can be called without creating an object of the class. method of the NumberUtils class that is used to convert the given string to a byte value. One variant of the method accepts a default value that is returned if the conversion fails.

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-lang package, refer to the Maven Repository.

You can import the NumberUtils class as follows.

import org.apache.commons.lang3.math.NumberUtils;

Syntax

public static byte toByte(final String str, final byte defaultValue)

Parameters

  • final String str: The string to convert.
  • final byte defaultValue: The default value to return.

Return value

This method returns a byte value. Otherwise, the default value is returned if the conversion fails.

Overloaded methods

  • public static byte toByte(final String str)

Code

import org.apache.commons.lang3.math.NumberUtils;
public class Main{
    public static void main(String[] args){
        // Example 1
        String stringToConvert = "6";
        byte defaultValue = 2;
        System.out.printf("The output of the method NumberUtils.toByte(%s, %s) is %s", stringToConvert, defaultValue, NumberUtils.toByte(stringToConvert, defaultValue));
        System.out.println();
        // Example 2
        stringToConvert = "233sdf";
        defaultValue = 2;
        System.out.printf("The output of the method NumberUtils.toByte(%s, %s) is %s", stringToConvert, defaultValue, NumberUtils.toByte(stringToConvert, defaultValue));
        System.out.println();
    }
}

Example 1

  • stringToConvert = "6"
  • defaultValue = 2

The method returns 6 as the conversion is successful.

Example 2

  • stringToConvert = "233sdf"
  • defaultValue = 2

The method returns 2 as the conversion is unsuccessful.

Output

The output of the code will be as follows:

The output of the method NumberUtils.toByte(6, 2) is 6
The output of the method NumberUtils.toByte(233sdf, 2) is 2

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