String/StringBuffer/StringBuilder 發表於 2019-12-26 | https://dotblogs.com.tw/jeff-yeh/2008/11/04/5870 http://blog.dontcareabout.us/2013/04/java-stringbuilder.html https://codertw.com/%E7%A8%8B%E5%BC%8F%E8%AA%9E%E8%A8%80/317560/ https://kknews.cc/zh-tw/code/l64vem2.html https://blog.csdn.net/chszs/article/details/45776403