Java method hump conversion method and underline character string

java method hump method and underline character string conversion 

. 1  Import java.util.regex.Matcher;
 2  Import java.util.regex.Pattern;
 . 3  
. 4  public  class CamelAndUnderLineConverter {
 . 5      Private  static the Pattern of Pattern.compile linePattern = ( "_ ( W \\) " );
 . 6  
. 7      / ** 
. 8       * underlined transfected hump
 . 9       * / 
10      public  static String lineToHump (String STR) {
 . 11          STR = str.toLowerCase ();
 12 is          Matcher Matcher = linePattern.matcher (STR);
 13          StringBuffer SB =new new the StringBuffer ();
 14          the while (matcher.find ()) {
 15              matcher.appendReplacement (SB, Matcher.group (. 1 ) .toUpperCase ());
 16          }
 . 17          matcher.appendTail (SB);
 18 is          return sb.toString ( );
 19      }
 20 is  
21 is      / ** 
22       * hump turn underscore (simple wording, efficiency is lower than { @link # humpToLine2 (String)})
 23 is       * / 
24      public  static String humpToLine (String STR) {
 25          return str.replaceAll ( "[AZ]", "_ $ 0" ) .toLowerCase ();
 26 is      }
27  
28      Private  static the Pattern of Pattern.compile humpPattern = ( "[AZ]" );
 29  
30      / ** 
31 is       * hump underlined turn, higher efficiency than the above
 32       * / 
33 is      public  static String humpToLine2 (String STR) {
 34 is          Matcher Matcher = humpPattern.matcher (STR);
 35          the StringBuffer SB = new new the StringBuffer ();
 36          the while (matcher.find ()) {
 37 [              matcher.appendReplacement (SB, "_" + Matcher.group (0 ) .toLowerCase ());
 38 is          }
 39          matcher.appendTail (SB);
40         return sb.toString();
41     }
42 
43     public static void main(String[] args) {
44         String lineToHump = lineToHump("f_parent_no_leader");
45         System.out.println(lineToHump);// fParentNoLeader
46         System.out.println(humpToLine(lineToHump));// f_parent_no_leader
47         System.out.println(humpToLine2(lineToHump));// f_parent_no_leader
48     }
49 }