public static String camelize(String s) {
        if (s == null) {
            return null;
        }
        s = s.toLowerCase();
        String[] array = StringUtil.split(s, "_");
        if (array.length == 1) {
            return StringUtil.capitalize(s);
        }
        StringBuffer buf = new StringBuffer(40);
        for (String string : array) {
            buf.append(StringUtil.capitalize(string));
        }
        return buf.toString();
    }
public static String camelize ( String s ) { if ( s == null ) { return null ; } s = s . toLowerCase ( ) ; String [ ] array = StringUtil . split ( s , "_" ) ; if ( array . length == 1 ) { return StringUtil . capitalize ( s ) ; } StringBuffer buf = new StringBuffer ( 40 ) ; for ( String string : array ) { buf . append ( StringUtil . capitalize ( string ) ) ; } return buf . toString ( ) ; }
_記法をキャメル記法に変換します。

@param s
テキスト
@return 結果の文字列