Load .text file in string array

Question

How can I load .txt file into string array?

private void FileLoader() {
    try {
        File file = new File("/some.txt");
        Scanner sc = new Scanner(new FileInputStream(file), "Windows-1251");
            //Obviously, exception
            int i = 0;
        while (sc.hasNextLine()) {
        morphBuffer[i] = sc.nextLine();
        i++;
            //Obviously, exception  
        }
        sc.close();
    } catch (FileNotFoundException e) {
        JOptionPane.showMessageDialog(null, "File not found: " + e);
        return;
    }
}

There is an issue with array's length, because I don't know how long my array will be. Of course i saw this question, but there is not an array of string. I need it, because I have to work with whole text, also with null strings. How can I load a text file into string array?

[`java.util.ArrayList`](http://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html). — johnchen902, Dec 15 '13 at 13:05

Sergey Kalinichenko · Accepted Answer · 2013-12-15T13:17:14.400

2

Starting with Java 7, you can do it in a single line of code:

List<String> allLines = Files.readAllLines("/some.txt", Charset.forName("Cp1251"));

If you need your data in a string array rather than a List<String>, call toArray(new Strinf[0]) on the result of the readAllLines method:

String[] allLines = Files.readAllLines("/some.txt", Charset.forName("Cp1251")).toArray(new String[0]);

edited Dec 15 '13 at 13:17

answered Dec 15 '13 at 13:09

Sergey Kalinichenko

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I can mistake, but I think `Charset.forName("Windiws-1251")`, rather than `Charset.forName("Cp1251")`. Or both will be right? – linuxedhorse Dec 15 '13 at 23:31
@linuxedhorse [You are right, that's two synonyms for the same encoding](http://ru.wikipedia.org/wiki/Windows-1251#.D0.9A.D0.BE.D0.B4.D0.B8.D1.80.D0.BE.D0.B2.D0.BA.D0.B0_Windows-1251_.28.D1.81.D0.B8.D0.BD.D0.BE.D0.BD.D0.B8.D0.BC_CP1251.29) – Sergey Kalinichenko Dec 16 '13 at 03:17

Deepak · Answer 2 · 2013-12-15T13:15:46.800

0

You can use Collection ArrayList

while (sc.hasNextLine()) {
    list.add(sc.nextLine());
    i++;
        //Obviously, exception  
}

http://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html

edited Dec 15 '13 at 13:15

answered Dec 15 '13 at 13:03

Deepak

1,641
16
28

I'm sorry, but how? I mean, how can I load a text file in ArrayList? And can I work with `ArrayList` using regex? – linuxedhorse Dec 15 '13 at 13:05
@linuxedhorse You can work with lists in (almost) the same way as with arrays. You can also convert lists to arrays if you prefer. – Sergey Kalinichenko Dec 15 '13 at 13:15
@linuxedhorse, where exactly are you using regex in your current code? – Paul Samsotha Dec 15 '13 at 13:18
I'm using regex in method in class, where `FileLoader()` is, and I'm working with the last one. – linuxedhorse Dec 15 '13 at 13:23

score 0 · Answer 3 · answered Dec 15 '13 at 13:09

Use List

private void FileLoader() {
try {
    File file = new File("/some.txt");
    Scanner sc = new Scanner(new FileInputStream(file), "Windows-1251");
    List<String> mylist = new ArrayList<String>();
    while (sc.hasNextLine()) {
        mylist.add(sc.nextLine());
    }
    sc.close();
} catch (FileNotFoundException e) {
    JOptionPane.showMessageDialog(null, "File not found: " + e);
    return;
}
}

Load .text file in string array

3 Answers3