Question 206038 in Flutter Question posted in
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Flutter – how to split each line of sentence into Array of string

String text = "test_123
check_1  123  
test_1
ASD@#$
qwer #$%^
test   1
this is book";

and turn it into a string array like:

{"test_123","check_1  123","test_1","ASD@#$","qwer #$%^","test   1","this is book"}
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4

Answers


  1. 0

    The split function is what will help you to achieve this, you’ll have to identify a pattern, which is a regular expression, that work as the split rule.

    From what I see the String text doesn’t have an intuitive pattern

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  2. 0

    If you want single elements, you can do this:

    List<String> myList = List.of(text.split(" "));

    However, like someone pointed out, there’s no recognizable pattern in what you wanna do. You can try some weird regex inside the split but I doubt it’ll work.

    EDIT: If you add n at the end of each block of text/string it will work. Example:

      String text = "test_123n check_1 123n test_1n ASD@#$n qwer #$%^n test  1n this is bookn";
    List<String> myList = List.of(text.split("n"));

    This should do the trick

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  3. 0

    There are a few ways to achieve this.

    You can use the String#split method, which uses a regular expression pattern as the argument.

    The following should suffice in identifying the new-line delimiter.

    rn?|n

    String[] strings = text.split("\r\n?|\n");

    Additionally, you could use the BufferedReader and StringReader classes.

    BufferedReader reader = new BufferedReader(new StringReader(text));
String[] strings = reader.lines().toList().toArray(new String[0]);
reader.close();

    Similarly, you could use the Scanner class.

    Scanner scanner = new Scanner(text);
scanner.useDelimiter("\r\n?|\n");
String[] strings = scanner.tokens().toList().toArray(new String[0]);
scanner.close();

    All of these methods will output the following.

    [test_123, check_1  123, test_1, ASD@#$, qwer #$%^, test   1, this is book]
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  4. 0

    You can use String.split method. Regular expressions can be used to define delimiter. For example:

        String newLine = "n";
    
    String str = String.join(newLine, "test_123", 
    "check_1  123", 
    "test_1", 
    "ASD@#$", 
    "qwer #$%^", 
    "test   1", 
    "this is book");


    String[] splitted = str.split("\s+|\n+");
    
    for (int i = 0; i < splitted.length; i++) {
        System.out.println(splitted[i]);
    }
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