java 替换方括号java
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replace square brackets java
提问by Ema
I want to replace text in square brackets with "" in java:
我想在java中用“”替换方括号中的文本：
for example I have the sentence
例如我有一句话
"Hello, [1] this is an example [2], can you help [3] me?"
"Hello, [1] this is an example [2], can you help [3] me?"
it should become:
它应该变成：
"Hello, this is an example, can you help me?"
“你好，这是一个例子，你能帮帮我吗？”
回答by Sean Patrick Floyd
String newStr = str.replaceAll("\[\d+\] ", "");
What this does is to replace all occurrences of a regular expression with the empty String.
这样做是用空字符串替换所有出现的正则表达式。
The regular expression is this:
正则表达式是这样的：
\[ // an open square bracket
\d+ // one or more digits
\] // a closing square bracket
// + a space character
Here's a second version (not what the OP asked for, but a better handling of whitespace):
这是第二个版本（不是 OP 要求的，而是更好地处理空格）：
String newStr = str.replaceAll(" *\[\d+\] *", " ");
What this does is to replace all occurrences of a regular expression with a single space character.
这样做是用单个空格字符替换所有出现的正则表达式。
The regular expression is this:
正则表达式是这样的：
* // zero or more spaces
\[ // an open square bracket
\d+ // one or more digits
\] // a closing square bracket
* // zero or more spaces
回答by nhahtdh
This should work:
这应该有效：
.replaceAll("\[.*?\]", "").replaceAll(" +", " ");
回答by Mohammed Shaheen MK
Please use this,
请使用这个，
String str = "[How are you]";
str = str.replaceAll("\[", "").replaceAll("\]","");
