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RSS订阅原创 字符流~~
public static void main(String[] args) throws IOException { File file = new File("ThreadDemo\\src\\Demo2\\a.txt"); BufferedWriter bw = new BufferedWriter(new FileWriter(file)); BufferedReader br = new BufferedReader(new FileReader(file)); .
2021-12-05 22:54:24
200
原创 TCP实现双人聊天
第一个人package TestDemo;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.ServerSocket;import java.net.Socket;import java.util.Scanner;public class tcp01 { public static void main(String[] args){.
2021-11-29 22:49:42
303
原创 UDP实现多人聊天
package UDPword;import java.io.IOException;import java.net.*;import java.util.Scanner;public class test extends Thread{ public static void main(String[] args) throws IOException { int port = 10000; String name; MulticastS.
2021-11-29 22:42:57
537
原创 java写入文本到excel表格
public static void main(String[] args) throws IOException { Workbook workbook= new HSSFWorkbook(); HSSFSheet sheet= (HSSFSheet) workbook.createSheet("test"); List<String> data = data(); int b=0; for (String da : data) { HS...
2021-11-29 22:37:08
588
原创 遍历磁盘。。。
public static void main(String[] args) { File file = new File("D:\\"); cha(file);}private static void cha(File src) { File[] files = src.listFiles(); if (files != null) { for (File file : files) { if (file.isDirectory...
2021-10-20 09:17:52
111
原创 Java中jdbc操作
1、写SQL语句a、create database phone_book;use phone_book;b、create table info (id char,name char(8),tel char(11),sex char(2));c、insert into info values ('1','艾琳','18702550410','女');insert into info values ('2','老一','18702550411','男');insert into ...
2021-09-27 20:36:30
130
原创 排序方法。
public class demo01 { public static Map<String, List<Employee>> groupByFirstChar(List<Employee> data){ Map<String, List<Employee>> result = new HashMap<>(); for(Employee e : data){ ...
2021-09-21 21:01:54
108
原创 数组反转、继承
99乘法表数组反转继承public interface Fu { void fish(); void sheep();}public interface Mu { void swim(); void sing();}public interface Zi extends Fu,Mu{ void Playgame();}public class zai implements Zi{ ...
2021-09-07 09:39:22
191
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