how to get a file as an input in java code example

Example 1: Write an application that reads the content of the current directory and prints it to the screen. java

package com.vogella.java.files;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.List;

public class FilesUtil {
    public static String readTextFile(String fileName) throws IOException {
        String content = new String(Files.readAllBytes(Paths.get(fileName)));
        return content;
    }

    public static List<String> readTextFileByLines(String fileName) throws IOException {
        List<String> lines = Files.readAllLines(Paths.get(fileName));
        return lines;
    }

    public static void writeToTextFile(String fileName, String content) throws IOException {
        Files.write(Paths.get(fileName), content.getBytes(), StandardOpenOption.CREATE);
    }

}

Example 2: java file reader construct input

Reader fileReader = new FileReader("c:\\data\\input-text.txt");