奇怪的String.split（“ \\ n”）行为

Question

I tried to split name but none of the tries using split method worked

public void insertUpdate(DocumentEvent e) {
   String name="PU_Y"+
               "PU-x"+
               "Pu-z";

    split = name.split("\\r\\n");
    split = name.split("\r\n");
    split = name.split("[\r\n]+");
    split = name.split("[\\r\\n]+");
    split = name.split("\\r?\\n");
    // I tried using all the above to split above string but was not successful
}

Please help to split this string

Answer 1

Your string doesn't contain any line breaks at all. The fact that you've concatenated it on multiple lines doesn't do anything. Your statement is equivalent to:

String name = "PU_Y" + "PU-x" + "Pu-z";

or

String name = "PU_YPU-xPu-z";

You probably meant:

String name = "PU_Y\r\n" +
              "PU-x\r\n" +
              "Pu-z";

Retest your regular expressions with that change.

Answer 2

Your string has no linebreaks in it, every time you start a new line, you are concatenating strings as one statement.

Your string will be:

"PU_YPU-xPu-z"

If you want newlines, put a \\r\\n in the String before you terminate the string on each line:

String name="PU_Y\r\n"+
            "PU-x\r\n"+
            "Pu-z\r\n";