通过String方法删除或替换“|”字符

Question

I would like to remove character "|" by using String#replaceAll() method. But first parameter is recognized regex meta character.

I tried replaceAll("\\|", ""); with escape character, but it cannot be compiled.

Are there any way to remove or replace "|" character by Java?

Answer 1

You need to double-escape the | when using replaceAll() , like:

myString.replaceAll("\\|", "");

This is because your string actually gets parsed twice , first as a literal string and then as a regular expression. So when you start with "\\\\|" the first parse gives you a literal string of \\| , which the regex parser then recognizes as | . This can be a bit confusing until you get used to it.

Answer 2

The correct answer is, don't use replaceAll() (which replaces regexes), use replace() which simply replaces a character:

replace("|", "");

fyi, despite the method name not having "all" in it, is does in fact replace all instances of the specified character.

Answer 3

Also, this does the job too:

String test = "Hello | Hi | Test";
System.out.println(test.replace("|", ""));

String replace method is a useful tool here. No need to use regexes.