在换行符后匹配字符串

Question

Within Java I have this string:

uk\learningAid\UserInputs\UserClass.java:16: error: cannot find symbol
player.mvRight(3);

I am currently using this regex to match 16 and cannot find symbol :

Pattern pattern = Pattern.compile(":(\\d+):\\serror:\\s(.*)");

However, I want to also match player.mvRight(3); which is on a new line. How do I do this?

I tried adding this \\\\n(.*) at the end of the reex, but it failed to match anything.

Answer 1

匹配包括新行在内的第一个“;”。

Pattern pattern = Pattern.compile(":(\\d)+:\\serror:\\s(.*)\\n(.*);");

Answer 2

As per your comments, if it doesn't necessarily need to be regex then the String methods such as substring() and indexof() can be used to get the position of certain characters and use those as markers for any strings with a certain pattern. The below SSCCE should work for your String and any of a similar format.

public  class Test {

    public static void main(String[] args) {
        String toProcess = "uk\\learningAid\\UserInputs\\UserClass.java:16: error: cannot find symbol \nplayer.mvRight(3);";
        int firstCol = toProcess.indexOf(":");
        int secondCol = toProcess.indexOf(":", firstCol+1);
        int lastCol = toProcess.lastIndexOf(":");
        System.out.println(toProcess.substring(firstCol+1, secondCol) + toProcess.substring(lastCol+1));
    }
}

Output:

16 cannot find symbol 
player.mvRight(3);

Also, if you want the line break removed you can just call toProcess = toProcess.replaceAll("\\n", ""); at the beginning to remove the line breaks.