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【零基础学Java】—笔记本USB接口案例（二十八）

一、笔记本电脑笔记本电脑（laptop）通常具备使用USB设备的功能，在生产时，笔记本都预留了可以插入USB设备的USB接口，但具体什么是USB设备，笔记本厂商并不关心，只要符合USB规格的设备都可以。二、案例分析进行描述笔记本，实现笔记本不用USB鼠标，USB键盘USB...

【零基础学Java】—发红包案例（二十三）

题目描述：分析：代码实现：public class User { private String name; private int money; public User() { } public User(String name, int money) { this.name = nam...

「大师课」搞定 Java 开发基础

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Java Spring Boot 2.6.0开发实战-1024程序员节创造营公益课

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Java Web开发-Web应用、Tomcat、HTTP请求与响应

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Java多线程案例

Java多线程案例单例模式单例模式能保证某个类在程序中只存在唯一一份实例, 而不会创建出多个实例饿汉模式：类加载的同时, 创建实例public class Singleton { private static Singleton instance = new Singleton();//类加载时实例...

深入理解Java GSS（含kerberos认证及在hadoop、flink案例场景举例）

01 引言在当今的信息安全环境下，保护敏感数据和网络资源的安全至关重要。Kerberos认证协议作为一种强大的网络身份验证解决方案，被广泛应用于许多大型分布式系统中，如：Hadoop。而Java GSS（Generic Security Services）作为Java提供的通用安全服务，与Kerbe...

使用Java NIO进行文件操作、网络通信和多路复用的案例

Java NIO（New Input/Output）是Java提供的一种新的I/O操作方式，相较于传统的Java I/O API，它能够更加高效地处理大量的并发连接。本文将详细介绍Java NIO的核心组件，包括Channel、Buffer和Selector，以及其他一些辅助类和接口。一、Chann...

登录注册-----java案例

import java.util.HashMap; import java.util.Map; import java.util.Scanner; public class Login { private Map<String, String> users; public Login()...

Java案例----公交车上下车计算（设定6站）

import java.sql.SQLOutput; import java.util.Scanner; public class bus { public static void main(String[] args) { //键盘录入 Scanner scanner = new Scanner(...

java多线程使用案例

Java中的多线程是一种能够在同一应用程序中执行多个并发任务的方法。以下是几个Java多线程使用的案例：经典的“打印Hello World”例子： class MyThread extends Thread { public void run() { for (int i = 0; i < ...

18 案例：开发JAVA采集程序

需求从外部购买数据，数据提供方会实时将数据推送到6台FTP服务器上，我方部署6台接口采集机来对接采集数据，并上传到HDFS中提供商在FTP上生成数据的规则是以小时为单位建立文件夹(2016-03-11-10)，每分钟生成一个文件（00.dat,01.data,02.dat,…）提供方不提供数据备份，...

JUC第四讲：Java中的锁/CAS原理与案例分析（下）

3.10、notifyAll 是怎么实现全唤起的？nofity 是获取 WaitSet 的头结点，执行唤起操作。nofityAll 的流程，可以简单的理解为就是循环遍历 WaitSet 的所有节点，对每个节点执行 notify 操作。3.3、Volatile/Synchronized两者区别：（锁的...

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