Java 非法转义字符“\(”？
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Illegal Escape Character "\("?
提问by user3025996
I need to escape the ( character without the output becoming anything other than..
我需要转义 ( 字符，而输出不会变成除..
a
一种
b
乙
Any help greatly appreciated!
非常感谢任何帮助！
Arbitrary Input:
任意输入：
"a"+"\n" +"("+"b"
"a"+"\n" +"("+"b"
Desired Output:
期望输出：
a
一种
b
乙
//Here are the attempted work-arounds that failed
40 String test = "a"+"\n("+"b";
41 String[] testSplitted = test.split("\n"+"(");
42 System.out.println(testSplitted[0]);
43 System.out.println(testSplitted[1]);
// ("\n"+"\(") ILLEGAL ESCAPE CHARACTER
// ("\n\(") ILLEGAL ESCAPE CHARACTER
// ("\n(") INVALID REGULAR EXPRESSION: UNCLOSED GROUP
// ("\n\(") Output: a \(b (Desired Output: a b)
// ("\n"+"[(]") Output:
a [(]b Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
at inputhandler.InputHandler.main(InputHandler.java:43)
Java Result: 1
// ("\n"+"(") Output:
Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed group near index 2
(
^
at java.util.regex.Pattern.error(Pattern.java:1924)
at java.util.regex.Pattern.accept(Pattern.java:1782)
at java.util.regex.Pattern.group0(Pattern.java:2857)
at java.util.regex.Pattern.sequence(Pattern.java:2018)
at java.util.regex.Pattern.expr(Pattern.java:1964)
at java.util.regex.Pattern.compile(Pattern.java:1665)
at java.util.regex.Pattern.<init>(Pattern.java:1337)
at java.util.regex.Pattern.compile(Pattern.java:1022)
at java.lang.String.split(String.java:2313)
at java.lang.String.split(String.java:2355)
at inputhandler.InputHandler.main(InputHandler.java:41)
Java Result: 1
采纳答案by Keppil
To escape (you need two backslashes since the backslash is a special character in Java strings, and needs to be escaped itself. So, it becomes: \\(
要转义，(您需要两个反斜杠，因为反斜杠是 Java 字符串中的一个特殊字符，需要对其本身进行转义。所以，它变成： \\(
