摘要: String s1="hello lxx"; String s2=new String("fff df"); System.out.println(s1.length()); System.out.println(s1.substring(0, 2)); System.out.println(s1. 阅读全文
posted @ 2018-09-29 18:44 lxxG 阅读(162) 评论(0) 推荐(0) 编辑