Java - read all text from file with custom FileUtils

package com.dirask.examples;

​

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.Reader;

import java.nio.charset.Charset;

import java.nio.charset.StandardCharsets;

​

class Program {

​

    public static void main(String[] args) throws IOException {

​

        String path = "C:\\Project\\input.txt";

        String text = readText(path, StandardCharsets.UTF_8);

        System.out.println(text);        

    }

    private static String readText(String path, Charset charset) throws IOException {

        StringBuilder builder = new StringBuilder();

        try (FileInputStream stream = new FileInputStream(path);

             Reader reader = new InputStreamReader(stream, charset))

        {

            char[] buffer = new char[1024];

            while (true) {

                int count = reader.read(buffer, 0, buffer.length);

                if (count == -1) {

                    break;

                }

                builder.append(buffer, 0, count);

            }

        }

        return builder.toString();

    }

}

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package com.dirask.examples;

​

import java.io.*;

import java.nio.file.Paths;

​

public class Program {

​

    public static void main(String[] args) throws IOException {

​

        readWithStringPath();

        readWithFileObject();

        readWithPathObject();

        readWithReaderObject();

        readWithInputStreamObject();

    }

​

    private static void readWithStringPath() {

        String text = FileUtils.readText("C:\\Project\\input.txt");

        System.out.println(text);

    }

​

    private static void readWithFileObject() {

        String text = FileUtils.readText(new File("C:\\Project\\input.txt"));

        System.out.println(text);

    }

​

    private static void readWithPathObject() {

        String text = FileUtils.readText(Paths.get("C:\\Project\\input.txt"));

        System.out.println(text);

    }

​

    private static void readWithReaderObject() {

        try(FileReader reader = new FileReader("C:\\Project\\input.txt")) {

            String text = FileUtils.readText(reader);

​

            System.out.println(text);

        }

    }

​

    private static void readWithInputStreamObject() {

        try(InputStream stream = new FileInputStream("C:\\Project\\input.txt")) {

            String text = FileUtils.readText(stream);

​

            System.out.println(text);

        }

    }

}

package com.dirask.examples;

​

import java.io.*;

import java.nio.file.Path;

​

public class FileUtils {

​

    public static String readText(Reader reader) throws IOException {

        StringBuilder builder = new StringBuilder();

        char[] buffer = new char[1024];

        while (true) {

            int count = reader.read(buffer, 0, buffer.length);

            if (count == -1) {

                break;

            }

            builder.append(buffer, 0, count);

        }

        return builder.toString();

    }

​

    public static String readText(InputStream stream) throws IOException {

        Reader reader = new InputStreamReader(stream, "UTF-8");

        return readText(reader);

    }

​

    public static String readText(File file) throws IOException {

        try (InputStream stream = new FileInputStream(file)) {

            return readText(stream);

        }

    }

​

    public static String readText(Path path) throws IOException {

        File file = path.toFile();

        return readText(file);

    }

​

    public static String readText(String path) throws IOException {

        try (FileInputStream stream = new FileInputStream(path)) {

            return readText(stream);

        }

    }

}

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