Hui-s-notebook/logseq-java/pages/StringBuilder.md

• 长度和内容可变的String 字符串

• //创建一个16个字符串
  StringBulider s = new StringBuilder();//可传入字符串，长度
  a.append("Hello,World");
  a.append("nihao");
  

• apppend
• insert
• capacity
• length
• setCharAt
• delete
• reverse
• substring
• indexOf
• lastIndexOf