import java.io.*;

public class FileIO {
 public static void main(String[] args) {
 writeText();
 readText();

 writeData();
 readData();
 }

 public static void writeText() {
 try (BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("./test.txt")))) {
 bw.write("呀呀呀\n啦啦啦");
 } catch (Exception ex) {
 ex.printStackTrace();
 }
 }

 public static void readText() {
 try (BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("./test.txt")))) {
 String line;
 while ((line = br.readLine()) != null) {
 System.out.println(line);
 }
 } catch (Exception ex) {
 ex.printStackTrace();
 }
 }


 public static void writeData() {
 try (DataOutputStream dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream("test.dat")))) {
 dos.writeUTF("二进制文件");
 dos.writeInt(233);
 } catch (Exception ex) {
 ex.printStackTrace();
 }
 }

 public static void readData() {
 try (DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream("./test.dat")))) {
 System.out.println(dis.readUTF() + ", " + dis.readInt());
 } catch (Exception ex) {
 ex.printStackTrace();
 }
 }
}