I am new to "REGEX".And this question is training and educational for regex in java.
I try to remove leading new line chars from a string.(I know we can do this by 'trim()',but I do not want use it).I use '^[\\r\\n]+' as regex,like this:
str = "\r\n\r\ntest";
str.replaceAll("^[\r\n]+", "");
System.out.print(str);
I guess result will be
test
But the result is:
CRLF
CRLF
test
As you can see,leading new line chars do not removed.Also I try '^\\s' or '^\\s+' as regex,but result was same.Do you know why those regexes do not match leading new line chars?
无法修改字符串:replaceAll返回更改后的字符串。
str = str.replaceAll(...);
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