readAllLines Charset in Java

Question

Update: Thanks for the quick responses, everyone. I've resolved the Charset issue, but now something else is happening that I don't understand at all. Here's my code:

import java.io.*;
import java.nio.file.*;
import java.nio.charset.*;
public class readConvertSeq{
    private static String[] getFile(Path file){
        String[] fileArray = (String[])Files.readAllLines(file, StandardCharsets.US_ASCII).toArray();
        return fileArray;
    }   
    public static void main(String[] args){
        String[] test = readConvertSeq.getFile(Paths.get(args[0]));
        int i;
        for(i = 0; i < test.length; i++){
            System.out.println(test[i]);
        }   
    }   
}  

And here's the error:

readConvertSeq.java:6: error: unreported exception IOException; must be caught or declared to be thrown
    String[] fileArray = (String[])Files.readAllLines(file, StandardCharsets.US_ASCII).toArray();

I'm just trying to get an array of strings from a file, and I'm getting really frustrated by Java's pedantry. Here's my code:

import java.io.*;
import java.nio.file.*;
import java.nio.charset.*;
public class readConvertSeq{
    private static String[] getFile(Path file){
        String[] fileArray = Files.readAllLines(file, Charset("US-ASCII")).toArray();
        return fileArray;
    }   
    public static void main(String[] args){
        String[] test = readConvertSeq.getFile(Paths.get(args[0]));
        int i;
        for(i = 0; i < test.length; i++){
            System.out.println(test[i]);
        }   
    }   
}   

It gives me this:

readConvertSeq.java:6: error: cannot find symbol
    String[] fileArray = Files.readAllLines(file, Charset("US-ASCII")).toArray();
                                                  ^
  symbol:   method Charset(String)
  location: class readConvertSeq

I'm sure I've made some other mistakes as well, so feel free to give me any advice you can.

Answer 1

Charset is an abstract class therefore you cannot instantiate it with the new keyword.

To get a charset in Java 1.7 use StandardCharsets.US_ASCII

Answer 2

Constructors in Java are called with the new operator, so Charset("US-ASCII") is not a valid statement. Moreover, Charset's constructor is protected, so you'll have to use the static factory method to create it: Charset.forName("US-ASCII").

Answer 3

You need to make the below changes

String[] fileArray = (String[]) Files.readAllLines(file.toPath(), Charset.forName("US-ASCII")).toArray();
                     ^^^^^ - Cast required                        ^^^^ - Get Charset using forName            

See the docs of Files.readAllLines(Path, Charset).