import java.io.*;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

import java.nio.file.Files;

import java.nio.file.Paths;

import java.util.List;

/**

* Created by 李恒名 on 2017/6/8.

*/

public class ReadFile {

public static void read(File file) {

try (BufferedReader reader = new BufferedReader(new FileReader(file))) {

while (reader.ready()) {

System.out.println(reader.readLine());

}

} catch (IOException e) {

e.printStackTrace();

}

}

public static void readByNIO(File file) {

try (FileChannel channel = new FileInputStream(file).getChannel()) {

ByteBuffer buffer = ByteBuffer.allocate((int) file.length());

channel.read(buffer);

System.out.println(new String(buffer.array()));

} catch (IOException e) {

e.printStackTrace();

}

}

public static void readByNIO2(File file) {

try {

List<String> lines = Files.readAllLines(Paths.get(file.toURI()));

for (String line : lines) {

System.out.println(line);

}

} catch (IOException e) {

e.printStackTrace();

}

}

public static void main(String[] args) {

File file = new File("README.md");

read(file);

readByNIO(file);

readByNIO2(file);

}

}