StringBuilder类型与String类型相互转换 

1 StringBuilder a  = new StringBuilder("This is testDemo");
2 String b = "Hello"+a;        //将StringBuilder类型转换成String类型
3 StringBuilder a  = new StringBuilder(a);        //将String类型转换为StringBuilder类型

 

posted @ 2019-10-10 23:10  Shawn_Michaels  阅读(4164)  评论(0)  编辑  收藏  举报