Is there any Java method that equivalents to php floatval?
If not, how can I get float value of a string in Java?
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4 Answers
float f = Float.parseFloat("25");
String s = Float.toString(25.0f);
System.out.printf("%f", Float.parseFloat("1.0E7")); outputs 10000000.000000
updated from natasha answer
use regex
Pattern p = Pattern.compile("([-+]?[0-9]*\\.?[0-9]+)");
Matcher m = p.matcher("some string and then a number 123.456789 and continue");
while (m.find()) {
System.out.println(m.group(1));
}
6 Comments
Vahid
Sorry, I didn't understand. What about this string: "122.34343The". And I want the number part: 122.34343
Ghostman
it will through a exception
NumberFormatException: For input string: "122.34343The" and check this link too ideone.com/NWbT6FVahid
Thank you soul. I found the answer and post it for others. +1 for your help.
Ghostman
@Natasha hmmm please update ur question its quiet confusing!!! anyways will upate my regex answer too
Vahid
soul, if you saw the php floatval link that I've mentioned in my post you could exactly saw what I wanted. :)
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Float#parseFloat parse String to float. But if string contain word character then it will throw NumberFormatException.
answered Oct 31, 2012 at 6:51
Subhrajyoti Majumder
41.3k13 gold badges84 silver badges103 bronze badges
2 Comments
Vahid
I don't need an exception. I need the Number part of the String. Thanks.
Subhrajyoti Majumder
then you should extract the number then parse it.
I found the solution using regex:
Pattern p = Pattern.compile("([-+]?[0-9]*\\.?[0-9]+)");
Matcher m = p.matcher("some string and then a number 123.456789 and continue");
if ( m.find() ) {
System.out.println(m.group(1)); // 123.456789
}
3 Comments
Vahid
Could you provide me an example with your code that returns 123.456789 from the string: "some string 123.456789 and continue". Thanks.
Ghostman
Use
java.util.Scanner download.oracle.com/javase/1.5.0/docs/api/java/util/…Vahid
So, that was not Exactly the same as floatval ;)
I have given a link to learn regarding converting float value from string which are as http://www.roseindia.net/java/beginners/ConvertStringToFloat.shtml I hope this one is very helpful for you
