随笔分类 -  Java

摘要：1.String类String对象永远不会改变，一旦创建后，String对象总是具有相同的字符和长度。The classStringincludes methods for examining individual characters of the sequence, for comparing strings, for searching strings, for extracting substrings, and for creating a copy of a string with all characters translated to uppercase or to lower 阅读全文