java.lang.Long.valueOf(String s, int radix) java.lang.Long.valueOf(String s) java.lang.Math.abs(double a) java.lang.Long.valueOf(String s, int radix) package com.codingdict; 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)); } } java.lang.Long.valueOf(String s) java.lang.Math.abs(double a)