Java 함수 라이브러리에서 일반적으로 사용되는 I/O 데이터 흐름 도구는 무엇입니까?

import java.io.FileInputStream; import java.io.IOException; public class ReadTextFile { public static void main(String[] args) { try (FileInputStream fis = new FileInputStream("myfile.txt")) { // 逐字节读取文件 int c; while ((c = fis.read()) != -1) { System.out.print((char) c); } } catch (IOException e) { e.printStackTrace(); } } }

import java.io.FileOutputStream; import java.io.IOException; public class WriteTextFile { public static void main(String[] args) { try (FileOutputStream fos = new FileOutputStream("myfile.txt")) { // 写入文本 String text = "Hello, world!"; fos.write(text.getBytes()); } catch (IOException e) { e.printStackTrace(); } } }

import java.io.ByteArrayInputStream; import java.io.DataInputStream; import java.io.IOException; public class ReadBasicTypesFromBytes { public static void main(String[] args) { // 定义字节数组并写入基本数据类型 byte[] bytes = {1, 2, 3, 4}; ByteArrayInputStream bis = new ByteArrayInputStream(bytes); DataInputStream dis = new DataInputStream(bis); try { // 读取基本数据类型 int i = dis.readInt(); System.out.println("Int: " + i); } catch (IOException e) { e.printStackTrace(); } } }

import java.io.ByteArrayOutputStream; import java.io.DataOutputStream; import java.io.IOException; public class WriteBasicTypesToBytes { public static void main(String[] args) { // 创建字节数组输出流 ByteArrayOutputStream bos = new ByteArrayOutputStream(); DataOutputStream dos = new DataOutputStream(bos); try { // 写入基本数据类型 dos.writeInt(12345); dos.flush(); // 获取字节数组 byte[] bytes = bos.toByteArray(); } catch (IOException e) { e.printStackTrace(); } } }