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<String>.

johnchen902
– johnchen902

2013-12-15 13:05:09 +00:00
Commented Dec 15, 2013 at 13:05 — johnchen902
– johnchen902, Commented Dec 15, 2013 at 13:05
Thanks to everyone for help!

linuxedhorse
– linuxedhorse

2013-12-15 13:24:55 +00:00
Commented Dec 15, 2013 at 13:24 — linuxedhorse
– linuxedhorse, Commented Dec 15, 2013 at 13:24

Sergey Kalinichenko · Accepted Answer · 2013-12-15 13:17:14Z

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, 2013 at 13:17

answered Dec 15, 2013 at 13:09

Sergey Kalinichenko

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2 Comments

linuxedhorse Over a year ago

I can mistake, but I think Charset.forName("Windiws-1251"), rather than Charset.forName("Cp1251"). Or both will be right?

Sergey Kalinichenko Over a year ago

@linuxedhorse You are right, that's two synonyms for the same encoding

Anurag · Accepted Answer · 2013-12-15 13:09:24Z

0

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;
}
}

answered Dec 15, 2013 at 13:09

Anurag

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Comments

Deepak · Accepted Answer · 2013-12-15 13:15:46Z

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, 2013 at 13:15

answered Dec 15, 2013 at 13:03

Deepak

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4 Comments

linuxedhorse Over a year ago

I'm sorry, but how? I mean, how can I load a text file in ArrayList? And can I work with ArrayList using regex?

Sergey Kalinichenko Over a year ago

@linuxedhorse You can work with lists in (almost) the same way as with arrays. You can also convert lists to arrays if you prefer.

Paul Samsotha Over a year ago

@linuxedhorse, where exactly are you using regex in your current code?

linuxedhorse Over a year ago

I'm using regex in method in class, where FileLoader() is, and I'm working with the last one.

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