394     public synchronized void set(String k, String v) {
 395         for (int i = nkeys; --i >= 0;)
 396             if (k.equalsIgnoreCase(keys[i])) {
 397                 values[i] = v;
 398                 return;
 399             }
 400         add(k, v);
 401     }
 402 
 403     /** Set's the value of a key only if there is no
 404      *  key with that value already.
 405      */
 406 
 407     public synchronized void setIfNotSet(String k, String v) {
 408         if (findValue(k) == null) {
 409             add(k, v);
 410         }
 411     }
 412 
 413     /** Convert a message-id string to canonical form (strips off
 414         leading and trailing <>s) */
 415     public static String canonicalID(String id) {
 416         if (id == null)
 417             return "";
 418         int st = 0;
 419         int len = id.length();
 420         boolean substr = false;
 421         int c;
 422         while (st < len && ((c = id.charAt(st)) == '<' ||
 423                             c <= ' ')) {
 424             st++;
 425             substr = true;
 426         }
 427         while (st < len && ((c = id.charAt(len - 1)) == '>' ||
 428                             c <= ' ')) {
 429             len--;
 430             substr = true;
 431         }
 432         return substr ? id.substring(st, len) : id;
 433     }
 434 

 394     public synchronized void set(String k, String v) {
 395         for (int i = nkeys; --i >= 0;)
 396             if (k.equalsIgnoreCase(keys[i])) {
 397                 values[i] = v;
 398                 return;
 399             }
 400         add(k, v);
 401     }
 402 
 403     /** Set's the value of a key only if there is no
 404      *  key with that value already.
 405      */
 406 
 407     public synchronized void setIfNotSet(String k, String v) {
 408         if (findValue(k) == null) {
 409             add(k, v);
 410         }
 411     }
 412 
 413     /** Convert a message-id string to canonical form (strips off
 414         leading and trailing {@literal <>s}) */
 415     public static String canonicalID(String id) {
 416         if (id == null)
 417             return "";
 418         int st = 0;
 419         int len = id.length();
 420         boolean substr = false;
 421         int c;
 422         while (st < len && ((c = id.charAt(st)) == '<' ||
 423                             c <= ' ')) {
 424             st++;
 425             substr = true;
 426         }
 427         while (st < len && ((c = id.charAt(len - 1)) == '>' ||
 428                             c <= ' ')) {
 429             len--;
 430             substr = true;
 431         }
 432         return substr ? id.substring(st, len) : id;
 433     }
 434