问题描述
- String类中的成员变量offset可以直接访问吗?
- 第一次提问~
今天在看String的字符串匹配实现,看到里面有个private的成员offset。/** The offset is the first index of the storage that is used. */ private final int offset;
完了之后再String的一个constructor中看到了这种访问
/** * Allocates a new string that contains the sequence of characters * currently contained in the string buffer argument. The contents of the * string buffer are copied; subsequent modification of the string buffer * does not affect the newly created string. * * @param buffer * A {@code StringBuffer} */ public String(StringBuffer buffer) { String result = buffer.toString(); this.value = result.value; this.count = result.count; this.offset = result.offset; }
有点乱,是不是我忽略或者理解错了什么?求大家指导
解决方案
估计是为了优化subString一类的函数而设立的。但是一般没有必要去访问offset。反射或许可以访问到。
解决方案二:
http://blog.csdn.net/arkblue/article/details/9158541
http://www.2cto.com/kf/201103/86457.html
时间: 2024-12-31 21:21:57