What's the best way to check if a String represents an integer in Java?

Question

I normally use the following idiom to check if a String can be converted to an integer.

public boolean isInteger( String input ) {
    try {
        Integer.         


        

Answer 1

org.apache.commons.lang.StringUtils.isNumeric 

though Java's standard lib really misses such utility functions

I think that Apache Commons is a "must have" for every Java programmer

too bad it isn't ported to Java5 yet