Difference between revisions of "Convert a String to a Number"

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(New page: ==String to int== <question xmlns:htm="http://www.w3.org/1999/xhtml" lang="java" className="Demo"><prog> public class Demo{ public static void main(String[] argv) { String s = "123...)
 
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==String to int==
 
==String to int==
 
<question xmlns:htm="http://www.w3.org/1999/xhtml" lang="java" className="Demo"><prog>
 
<question xmlns:htm="http://www.w3.org/1999/xhtml" lang="java" className="Demo"><prog>

Revision as of 20:48, 31 December 2007

String to int

The static method Integer.parseInt will do the trick

There is a danger that the string does not represent a valid number in which case an exception will be raised.

There are plenty of similar routines such as: Float.parseFloat Long.parseLong Double.parseDouble Boolean.parseBoolean

The value "1234" is a string, you need to treat it as a number - to add 1, giving 1235.

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