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原创 TCP接收数据

/*接收数据*/public class ServerSocketDome {public static void main(String[] args) throws IOException {//1.创建服务器端的Socket对象//ServerSocket(int port) 创建绑定到指定端口的服务器套接字。ServerSocket ss = new ServerSocket(10001); //2.监听客户端的连接，返回一个Socket对象 //Socket acc

2020-09-17 09:06:14 215

原创 TCP发送数据

/*TCP发送数据*/public class SocketDome01 {public static void main(String[] args) throws IOException {//1.创建客户端的Socket对象//Socket(String host, int port) 创建流套接字并将其连接到指定主机上的指定端口号。Socket s = new Socket(“zshao”,10001); //2.获取输出流，写数据 //OutputStream ge

2020-09-17 09:02:25 186

原创网络编程UDP接收数据

public class ReceiveDome {public static void main(String[] args) throws IOException {//创建接收端Socket对象（DatagramSocket），绑定端口号DatagramSocket ds = new DatagramSocket(10086);//创建一个数据包用于接收对象byte[] bys = new byte[1024];DatagramPacket dp = new DatagramPacket(

2020-09-05 14:26:22 243

原创网络编程UDP发送数据

public class sendDome {public static void main(String[] args) throws IOException {//创建发送端的Socket对象（DatagramSocket）DatagramSocket ds = new DatagramSocket();//创建数据，并把数据打包byte[] bys = “hello,UDO”.getBytes();//构造一个数据包，发送长度为length的数据包到指定主机上的指定端口号Datagram

2020-09-05 14:25:40 130

原创复制文件到指定文件夹下，复制目录和文件

package JavaHeiMa02.src.复制文件.复制多级文件;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class test {public static void main(String[] args) throws IOException {copyDir(“C:\Users\Adminis

2020-08-27 11:20:50 565

原创复制多级文件到制定文件夹下，不复制文件夹，只复制文件

package JavaHeiMa02.src.复制文件.复制多级文件;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class test {public static void main(String[] args) throws IOException {copyDir(“C:\Users\Adminis

2020-08-27 11:18:58 424

原创 io集合到文件

public class ArrayListToTxtDome01 {public static void main(String[] args) throws IOException {ArrayList arr = new ArrayList();arr.add(“lichenfei01”);arr.add(“lichenfei02”);BufferedWriter bw = new BufferedWriter(new FileWriter(“D://IDEA//src//JavaHeiMa

2020-08-17 18:03:56 97

原创 IO字符流复制文件（升级版）

public class CopyJavaDome02 {public static void main(String[] args) throws IOException {FileReader fr = new FileReader(“D:\IDEA\src\JavaHeiMa02\src\字符流CharStream\字符流输入流读数据\InputStreamReaderDome01.java”);FileWriter fw = new FileWriter(“D:\IDEA\src\JavaHe

2020-08-12 17:56:11 78

原创 IO字符流复制文件

public class CopyJavaDome01 {public static void main(String[] args) throws IOException {InputStreamReader isr = new InputStreamReader(new FileInputStream(“D:\IDEA\src\JavaHeiMa02\src\字符流CharStream\字符流输入流读数据\InputStreamReaderDome01.java”));OutputStreamWr

2020-08-12 16:49:42 86

原创 IO字符流读数据InputStreamReader

import java.io.FileInputStream;import java.io.IOException;import java.io.InputStreamReader;public class InputStreamReaderDome01 {public static void main(String[] args) throws IOException { InputStreamReader isr = new InputStreamReader(new FileInput

2020-08-12 15:55:29 119

原创 IO字符流写数据OutputStreamWriter

import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStreamWriter;public class OutputStreamWriterDome01 {public static void main(String[] args) throws IOException {OutputStreamWriter osw = new OutputStreamWriter(new FileOut

2020-08-12 15:54:20 116

原创 IO字符流文件读取数据一次读取一个字符和一次读取一个数组

import java.io.*;public class ConversionStreamDome01 {public static void main(String[] args) throws IOException { //字符输出流 OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream ("D:\\IDEA\\src\\JavaHeiMa02\\src\\字符流CharS

2020-08-12 15:06:12 741 2

原创字节流读取数据一次读取一个数组

public class FileInputStreamDome02 {public static void main(String[] args) throws IOException {FileInputStream fis =new FileInputStream(“D:\IDEA\src\JavaHeiMa02\src\字节流ByteStream\字节流读数据\fis.txt”);byte[] bys = new byte[1024];int len;while ((len=fis.re

2020-08-11 17:08:57 359

原创字节流读数据一次读取一个字节

public class FileInputStreamDome01 {public static void main(String[] args) throws IOException {FileInputStream fis =new FileInputStream(“D:\IDEA\src\JavaHeiMa02\src\字节流ByteStream\字节流读数据\fis.txt”);// int read = fis.read();//读数据方法// System

2020-08-11 17:07:56 399

原创字节流复制视频，并对比字节流复制视频和字节缓冲流复制视频的耗时

import java.io.*;public class BufferStreamDome01 {public static void main(String[] args) throws IOException {long kaishi = System.currentTimeMillis();// mothed01();// mothed02(); //共用时：414毫秒// mothed03(); //共用时：1821毫秒mothe

2020-08-11 16:19:47 234

原创遍历Map集合

遍历Map集合两种方式1、public class MapDome01 {public static void main(String[] args) {Map<String,String> map = new HashMap<String, String>();map.put(“001”,“100”);map.put(“002”,“200”); Set<String> set = map.keySet(); for (String key

2020-08-03 15:18:22 130

原创 java中遍历数组

java中遍历数组 int[]arr = {1,2,3,4,5}; //调用方法 String s = arrarytoString(arr); System.out.println(s); //遍历数组 System.out.print("数组遍历：["); for (int i=0;i<arr.length;i++){ if (i==arr..

2020-05-29 12:53:21 401

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