Replaced StringBuffer with StringBuilder

[spring-ext/ozacc-mail.git] / src / main / java / com / ozacc / mail / impl / OMLMimeMessage.java

diff --git a/src/main/java/com/ozacc/mail/impl/OMLMimeMessage.java b/src/main/java/com/ozacc/mail/impl/OMLMimeMessage.java
index 88d6ad3..7575c00 100644 (file)
--- a/src/main/java/com/ozacc/mail/impl/OMLMimeMessage.java
+++ b/src/main/java/com/ozacc/mail/impl/OMLMimeMessage.java
@@ -63,7 +63,7 @@ public class OMLMimeMessage extends MimeMessage {
         * @return タイムスタンプ + 16桁の乱数 + messageIdプロパティを連結した文字列
         */
        protected String generateRandomMessageId() {
-               StringBuffer buf = new StringBuffer();
+               StringBuilder buf = new StringBuilder();
                buf.append("<");
                buf.append(System.currentTimeMillis()).append(".");
                for (int i = 0; i < 16; i++) {