摘要: 1== String s1 = "hello"; String s2 ="hello"; String s3 = new String("hello"); s1 += "world"; 2== Sring的不可变性--final 3== String, StringBuffer, StringBui 阅读全文
posted @ 2021-10-27 08:54 悟_空 阅读(27) 评论(0) 推荐(0)