How to split a java text block by lines? [duplicate]

Question

Let's say we have the following java text block :

         String textblock = """
                 A : 111
                 B : 111
                 C : 1111
                 """;

I would like to split it by lines to get the following result :

         String [] splitedTextBlock = splitTextBlockSomeHow(textblock); 
         // expected result : {"A : 111", "B : 222", "C : 333"}

String.split(text, "\n"). Then again by ":" to get your key/value pairs. — user8681
– user8681, Commented Aug 3, 2023 at 15:16
@Jorn you probably meant text.split("\n") (or even text.split("\n", -1)) — user16320675
– user16320675, Commented Aug 3, 2023 at 15:21
Thanks you both, i found also that i could use text.split(System.lineSeparator()) to make it more generic — Hassen Gaaya
– Hassen Gaaya, Commented Aug 3, 2023 at 15:22
@user16320675 Could be! Since I switched to Kotlin, I never remember what in the Java stdlib is static and what isn't. — user8681
– user8681, Commented Aug 3, 2023 at 15:22
alternatives: text.lines().toArray() or text.lines().toList() — user16320675
– user16320675, Commented Aug 3, 2023 at 15:23

Freeman · Accepted Answer · 2023-08-03 15:25:07Z

2

check this out:

String textblock = """
        A : 111
        B : 111
        C : 1111
        """;

String[] splitedTextBlock = textblock.split("\\R");

for (String line : splitedTextBlock) {
    System.out.println(line);
}

the split("\\R") method is used to split the text block by lines
the \\R regular expression pattern matches any line break, including different line break sequences like \n or \r\n

answered Aug 3, 2023 at 15:25

Freeman

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Yaroslavm · Accepted Answer · 2023-08-03 17:19:59Z

0

public static String[] splitTextBlock(String textblock) {
   return textblock.trim().split(System.lineSeparator());
}

...

String textblock = """
        A : 111
        B : 111
        C : 1111
        """;
        
String[] splitedTextBlock = splitTextBlock(textblock);
Arrays.stream(splitedTextBlock).forEach(System.out::println);

edited Aug 3, 2023 at 17:19

answered Aug 3, 2023 at 15:27

Yaroslavm

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2 Comments

VLAZ Over a year ago

System.lineSeparator() won't work if you receive different line separators than what you have on the current system. For example, running the code on Linux but reading or getting some text which uses Windows line endings. Or vice versa.

Hassen Gaaya Over a year ago

@vlaz thank you for this point, I am using it in context of unit test

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