标题: spilt()需要注意的事项 [打印本页] 作者: NeXtyin 时间: 2016-5-7 23:45 标题: spilt()需要注意的事项 spilt()需要注意的事项，就是当分隔符为 . 的话，处理起来不一样，必须写成\\.因为.是正则表达式里的一个特殊符号，必须进行转义
--------------------public native String intern();--------------------（补充知识点：经网友java2000_wl提醒，特此补充，欢迎广大读者及时提出建议，我必将虚心接受！）
intern()方法和前面说的equals()方法关系密切，从public native String intern()看出，它是Java的本地方法，我们先来看看Java文档里的描述：
[java] view plain copy
Returns a canonical representation for the string object.
A pool of strings, initially empty, is maintained privately by the
class String.When the intern method is invoked, if the pool already contains a
string equal to this String object as determined by
theequals(Object) method, then the string from the pool is
returned. Otherwise, this String object is added to the
pool and a reference to this String object is returned.
It follows that for any two strings s and t,
s.intern()==t.intern() is true if and only if s.equals(t) is true.
All literal strings and string-valued constant expressions are interned.
@return a string that has the same contents as this string, but is
guaranteed to be from a pool of unique strings.