Java 替换字符串中的所有方括号 [英] Java replace all square brackets in a string

问题描述

我想从字符串中删除方括号，但我不知道如何.

I want to remove square brackets from a string, but I don't know how.

String str = "[Chrissman-@1]";
str = replaceAll("\[\]", "");

String[] temp = str.split("-@");
System.out.println("Nickname: " + temp[0] + " | Power: " + temp[1]);

但我的结果是:[Chrissman |1]方括号不会被删除.

But my result is: [Chrissman | 1] The square brackets doesn't get removed.

我尝试使用不同的正则表达式:"\[.*?\]", "\[\d+\]"但结果是一样的，方括号仍然附在字符串上.

I tried using a different regex: "\[.*?\]", "\[\d+\]" but the result is the same, the square brackets still attached on the string.

我试过了:

str.replaceAll("]", "");
str.replaceAll("[", "");

现在我得到:

Exception in thread "Thread-4" java.util.regex.PatternSyntaxException: Unclosed character class near index 0
[
^
    at java.util.regex.Pattern.error(Unknown Source)
    at java.util.regex.Pattern.clazz(Unknown Source)
    at java.util.regex.Pattern.sequence(Unknown Source)
    at java.util.regex.Pattern.expr(Unknown Source)
    at java.util.regex.Pattern.compile(Unknown Source)
    at java.util.regex.Pattern.<init>(Unknown Source)
    at java.util.regex.Pattern.compile(Unknown Source)
    at java.lang.String.replaceAll(Unknown Source)

推荐答案

replaceAll 方法正在尝试匹配 String 中不存在的字符串文字 []尝试单独更换这些项目.

The replaceAll method is attempting to match the String literal [] which does not exist within the String try replacing these items separately.

String str = "[Chrissman-@1]";
str = str.replaceAll("\[", "").replaceAll("\]","");

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