Java FileInputStream Read readFile(String filename)

Description

read File

License

Open Source License

Declaration

public static String readFile(String filename) throws IllegalArgumentException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class Main {
    public static String readFile(String filename) throws IllegalArgumentException {
        String fileContents = "";

        File file = new File(filename);
        if (!file.exists() || !file.isFile())
            throw new IllegalArgumentException();

        try (FileInputStream stream = new FileInputStream(file)) {
            byte[] fileBytes = new byte[(int) file.length()];

            stream.read(fileBytes, 0, (int) file.length());
            //throw new IllegalArgumentException();

            fileContents = new String(fileBytes);
        } catch (IOException ex) {
            System.err.println(ex.getMessage());
            System.exit(-1);// w  w w .  j a  va 2  s. c o  m
        }

        return fileContents;
    }
}

Related

1. readFile(String filename)
2. readFile(String filename)
3. readFile(String fileName)
4. readFile(String fileName)
5. readFile(String filename)
6. readFile(String filename)
7. readFile(String fileName)
8. readFile(String fileName, String charset)
9. readFile(String filePath)