java 从java中的句号拆分
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split from full stop in java
提问by heshan
Possible Duplicate:
The split() method in Java does not work on a dot (.)
可能的重复：
Java 中的 split() 方法对点 (.)
I'm new to java. I want to split a String from "." (dot) and get those names one by one. But this program gives error: "Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0"please help me
我是 Java 新手。我想从“.”中拆分一个字符串。（点）并一一获取这些名称。但是这个程序出错了： "Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0"请帮帮我
String input1 = "van.bus.car";
System.out.println(input.split(".")[0]+"");
System.out.println(input.split(".")[1]+"");
System.out.println(input.split(".")[2]+"");
回答by Rohit Jain
In regex, Dot(.)is a special meta-character which matches everything.
在正则表达式中，Dot(.)是一个特殊的元字符，它匹配everything.
Since String.splitworks on Regex, so you need to escape it with backslash if you want to match a dot.
由于String.split适用于正则表达式，因此如果要匹配dot.
System.out.println(input.split("\.")[0]+"");
To learn more about Regex, refer to following sites: -
要了解有关 Regex 的更多信息，请参阅以下站点：-
回答by pb2q
The argument to splitis a regex, and so the full stop/dot/.has a special meaning: match any character. To use it literally in your split, you'll need to escape it:
的参数split是一个正则表达式，所以句号/点/.有一个特殊的含义：匹配任何字符。要在拆分中按字面使用它，您需要将其转义：
String[] splits = input1.split("\.");
That should give you an array of length 3 for your input string.
这应该为您的输入字符串提供一个长度为 3 的数组。
For more about regex and which characters are special, see the docs for Pattern.
