How to extract a number from a string using Java? Thanks!?

Question

For instance:
Blk 216 Dover Road #04-56

Answer 1

First, you need to isolate the number in the string.

string s = "Blk 216 Dover Road #04-56";
string number = s.substring(4,6);

Then you can parse an int from it

int i = Integer.parseInt(number);

Look here for the documentation for the String class:
http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html

There are some indexOf() methods you could use to search the original string if the number isn't always going to be in the same place.

Answer 2

First assign a substring of a string that contains numbers to a string.
Then use parseInt, parseLong, parseFloat or parseDouble to extract the number from the string.

Easy.

Answer 3

Another example:
http://javablogx.blogspot.com/2014/02/how-to-extract-all-numbers-from-string.html

It uses regular expression with a pattern matcher.