字节流和字符流的区别是什么

import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;
public class ByteFileStreamExample {    public static void main(String[] args) {        // 读取文件        try (FileInputStream fis = new FileInputStream("input.txt")) {            int data;            while ((data = fis.read()) != -1) {                // 处理字节数据                System.out.print((char) data);            }        } catch (IOException e) {            e.printStackTrace();        }
        // 写入文件        try (FileOutputStream fos = new FileOutputStream("output.txt")) {            String content = "Hello, Byte Stream!";            fos.write(content.getBytes());        } catch (IOException e) {            e.printStackTrace();        }    }}

import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;
public class ByteBufferedStreamExample {    public static void main(String[] args) {        try (BufferedInputStream bis = new BufferedInputStream(new FileInputStream("input.txt"));             BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("output.txt"))) {
            int data;            while ((data = bis.read()) != -1) {                // 处理字节数据                bos.write(data);            }        } catch (IOException e) {            e.printStackTrace();        }    }}

import java.io.*;
public class ObjectStreamExample {    public static void main(String[] args) {        // 写入对象        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("object.dat"))) {            MyClass obj = new MyClass("John Doe", 25);            oos.writeObject(obj);        } catch (IOException e) {            e.printStackTrace();        }
        // 读取对象        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("object.dat"))) {            MyClass obj = (MyClass) ois.readObject();            System.out.println("Name: " + obj.getName() + ", Age: " + obj.getAge());        } catch (IOException | ClassNotFoundException e) {            e.printStackTrace();        }    }}
class MyClass implements Serializable {    private String name;    private int age;
    public MyClass(String name, int age) {        this.name = name;        this.age = age;    }
    public String getName() {        return name;    }
    public int getAge() {        return age;    }}

import java.io.*;
public class ByteToCharStreamExample {    public static void main(String[] args) {        // 字节流转字符流读取文件        try (FileInputStream fis = new FileInputStream("input.txt");             InputStreamReader isr = new InputStreamReader(fis, "UTF-8")) {            int data;            while ((data = isr.read()) != -1) {                // 处理字符数据                System.out.print((char) data);            }        } catch (IOException e) {            e.printStackTrace();        }
        // 字节流转字符流写入文件        try (FileOutputStream fos = new FileOutputStream("output.txt");             OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8")) {            String content = "Hello, Character Stream!";            osw.write(content);        } catch (IOException e) {            e.printStackTrace();        }    }}

import java.io.*;
public class CharBufferedStreamExample {    public static void main(String[] args) {        try (BufferedReader br = new BufferedReader(new FileReader("input.txt"));             PrintWriter pw = new PrintWriter(new FileWriter("output.txt"))) {
            String line;            while ((line = br.readLine()) != null) {                // 处理字符数据                pw.println(line);            }        } catch (IOException e) {            e.printStackTrace();        }    }}