How to convert string to long [duplicate]

Answer 1

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

This will handle null

NumberUtils.createLong(String)

Answer 2

Use parseLong(), e.g.:

long lg = lg.parseLong("123456789123456789");

Answer 3

You can also try following,

long lg;
String Str = "1333073704000"
lg = Long.parseLong(Str);

Answer 4

String s = "1";

try {
   long l = Long.parseLong(s);       
} catch (NumberFormatException e) {
   System.out.println("NumberFormatException: " + e.getMessage());
}

Answer 5

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.

Answer 6

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.