Java.lang.Long.valueOf() Method


The java.lang.Long.valueOf(String s, int radix) method returns a Long object holding the value extracted from the specified String s when parsed with the radix given by the second argument radix.


Following is the declaration for java.lang.Long.valueOf() method

public static Long valueOf(String s, int radix) throws NumberFormatException


  • s − This is the string to be parsed.

  • radix − This is the radix to be used in interpreting s.

Return Value

This method returns a Long object holding the value represented by the string argument in the specified radix.


NumberFormatException − If the String does not contain a parsable long.


The following example shows the usage of java.lang.Long.valueOf() method.

package com.tutorialspoint;

import java.lang.*;

public class LongDemo {

   public static void main(String[] args) {

      Long l = new Long(30);
      String str = "75650";
      /* returns a Long instance representing the specified 
         string with radix 10 */
      System.out.println("Value = " + l.valueOf(str, 10));

Let us compile and run the above program, this will produce the following result −

Value = 75650