Read specific line out of String

Question

I have a String that looks like this:

String meta = "1 \n"
    + "Herst \n"
    + "01 Jan 2019 – 31 Dec 2020 \n"
    + "01 Jan 2020 \n"
    + "CONFIG \n"
    + "XML \n"
    + "AES \n"
    + "RSA \n"
    + "256 \n"
    + "16 \n"
    + "128 \n";

What is the smartest way if I want to read a specific line out of this String in Java?

For example, I need in another part of my code the number of the second last line (in this case it's 16). How can I read this number out of the String?

[Read String line by line](https://stackoverflow.com/questions/1096621/read-string-line-by-line) — Max Vollmer, Nov 03 '19 at 18:15
[How to get numbers out of string?](https://stackoverflow.com/questions/3272575/how-to-get-numbers-out-of-string) — Max Vollmer, Nov 03 '19 at 18:15

score 3 · Accepted Answer · answered Nov 03 '19 at 18:18

3

If it's already in String form, just split it into lines using \n as a delimiter to get an array of lines:

String[] lines = meta.split("\n");

Then you can easily get a specific line. For instance, System.out.println(lines[9]) will print 16.

If you need the 16 in the form of an int, you'd need to remove the whitespaces around it, and parse it:

int parsed = Integer.parseInt(lines[9].trim());

answered Nov 03 '19 at 18:18

Malt

28,965
9
65
105

Thank you, this is exactly what I have looked for! – aslanj Nov 03 '19 at 18:41

Read specific line out of String

1 Answers1