BufferedReader缓存字符流读取、缓存字符流写入

 读取：

package io;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

/**
 * @ClassName BufferedReader
 * @Author 瞿肖
 * @Date 2022/7/8 10:20
 */
public class BufferedReaderA {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new FileReader("D:\\我的电脑\\asd\\a.txt"));
            char[] arr = new char[1024];
            int len = 0;
            while ((len = br.read(arr)) != -1) {
                System.out.println(new String(arr, 0, len));
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}

理解前面的知识点，这个就没有上面难度，反正理解为这个类比前面的类速度更快就好了

写入：

package io;

import java.io.*;

/**
 * @ClassName BufferedReader
 * @Author 瞿肖
 * @Date 2022/7/8 10:20
 */
public class BufferedReaderAndBufferedWriter {
    public static void main(String[] args) {
//        try {
//            BufferedReader br = new BufferedReader(new FileReader("D:\\我的电脑\\asd\\a.txt"));
//            char[] arr = new char[1024];
//            int len = 0;
//            while ((len = br.read(arr)) != -1) {
//                System.out.println(new String(arr, 0, len));
//            }
//        } catch (IOException e) {
//            throw new RuntimeException(e);
//        }
        try {
            BufferedWriter bw = new BufferedWriter(new FileWriter("D:\\我的电脑\\asd\\a.txt"));
            char[] arr = "我是你爹真伟大".toCharArray();
            bw.write(arr, 0, arr.length);
            bw.flush();
            bw.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}