string-utils

I have a String and I want to extract the (only) sequence of digits in the string. Example: helloThisIsA1234Sample. I want the 1234 It's a given that the sequence of digits will occur only once within the string but not in the same position. (for those who will ask, I have a server name and need to extract a specific number within it) I would like to use the StringUtils class from Apache commomns. Thanks! Use this code numberOnly will contain your desired output. String str="sdfvsdf68fsdfsf8999fsdf09"; String numberOnly= str.replaceAll("[^0-9]", ""); Michael Bavin I always like using Guava

I ran into some code that has the following: String foo = getvalue("foo"); if (StringUtils.isBlank(foo)) doStuff(); else doOtherStuff(); This appears to be functionally equivalent to the following: String foo = getvalue("foo"); if (foo.isEmpty()) doStuff(); else doOtherStuff(); Is a difference between the two ( org.apache.commons.lang3.StringUtils.isBlank and java.lang.String.isEmpty )? arshajii StringUtils.isBlank() checks that each character of the string is a whitespace character (or that the string is empty or that it's null). This is totally different than just checking if the string is