How to convert string to long

Question

how do you convert a string into a long   for int you  int i   3423  String str  str   str valueOf i     so how do you go the other way but with long   long lg  String Str    1333073704000  lg   lg valueOf Str

User · Answer

String s    1    try      long l   Long parseLong s            catch  NumberFormatException e       System out println  NumberFormatException      e getMessage

User · Answer

The method for converting a string to a long is Long parseLong   Modifying your example   String s    1333073704000   long l   Long parseLong s      Now l   1333073704000

User · Answer

import org apache commons lang math NumberUtils    This will handle null   NumberUtils createLong String

User · Answer

Use parseLong    e g    long lg   lg parseLong  123456789123456789

User · Answer

Do this   long l   Long parseLong str     However  always check that str contains digits to prevent throwing exceptions  For instance   String str  ABCDE   long l   Long parseLong str     would throw an exception but this  String str  1234567   long l   Long parseLong str     won t

User · Answer

You can also try following    long lg  String Str    1333073704000  lg   Long parseLong Str

User · Answer

This is a common way to do it   long l   Long parseLong str     There is also this method  Long valueOf str   Difference is that parseLong returns a primitive long while valueOf returns a new Long   object

User · Answer

IF your input is String then I recommend you to store the String into a double and then convert the double to the long    String str    123 45   Double  a   Double parseDouble str    long b   Math round a

[java] How to convert string to long

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