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title="Java基础">Java基础</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2025-02-12T16:00:00.000Z" title="发表于 2025-02-13 00:00:00">2025-02-13</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/Java/">Java</a></span><span class="article-meta tags"><span class="article-meta-separator">|</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/%E6%8A%80%E6%9C%AF/">技术</a><span class="article-meta-link">•</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/Java/">Java</a></span></div><div class="content">Java快速入门java程序基础JVM、JDK和JRE JVM:Java Virtual Machine JDK:Java Development Kit JRE:Java Runtime Environment Java虚拟机(JVM)是运行 Java 字节码的虚拟机。JVM有针对不同系统的特定实现(Windows,Linux,macOS),目的是使用相同的字节码,它们都会给出相同的结果。 JDK是Java Development Kit,它是功能齐全的Java SDK。它拥有JRE所拥有的一切,还有编译器(javac)和工具(如javadoc和jdb)。它能够创建和编译程序。 JRE 是 Java运行时环境。它是运行已编译 Java 程序所需的所有内容的集合,包括 Java虚拟机(JVM),Java类库,java命令和其他的一些基础构件。但是,它不能用于创建新程序。 简单地说,JRE就是运行Java字节码的虚拟机。但是,如果只有Java源码,要编译成Java字节码,就需要JDK,因为JDK除了包含JRE,还提供了编译器、调试器等开发工具。 我们需要格外注意的是...</div></div></div><div class="recent-post-item"><div class="post_cover"><a href="/2025/02/05/C++%E6%A0%B8%E5%BF%83%E7%BC%96%E7%A8%8B/" title="C++核心编程"><img class="post-bg" src="https://raw.githubusercontent.com/Justtyn/Justyn-Images/refs/heads/main/2022-8-7/taotao.jpg" onerror="this.onerror=null;this.src='/image/404.png'" alt="C++核心编程"></a></div><div class="recent-post-info"><a class="article-title" href="/2025/02/05/C++%E6%A0%B8%E5%BF%83%E7%BC%96%E7%A8%8B/" title="C++核心编程">C++核心编程</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2025-02-04T16:00:00.000Z" title="发表于 2025-02-05 00:00:00">2025-02-05</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/C/">C++</a><i class="fas fa-angle-right article-meta-link"></i><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/C/%E6%A0%B8%E5%BF%83%E7%BC%96%E7%A8%8B/">核心编程</a></span><span class="article-meta tags"><span class="article-meta-separator">|</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/%E6%8A%80%E6%9C%AF/">技术</a><span class="article-meta-link">•</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/C/">C</a><span class="article-meta-link">•</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/C/">C++</a><span class="article-meta-link">•</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/%E6%A0%B8%E5%BF%83%E7%BC%96%E7%A8%8B/">核心编程</a></span></div><div class="content">C++核心编程本阶段主要针对C++==面向对象==编程技术做详细讲解,探讨C++中的核心和精髓。 1 内存分区模型C++程序在执行时,将内存大方向划分为4个区域 代码区:存放函数体的二进制代码,由操作系统进行管理的 全局区:存放全局变量和静态变量以及常量 栈区:由编译器自动分配释放, 存放函数的参数值,局部变量等 堆区:由程序员分配和释放,若程序员不释放,程序结束时由操作系统回收 内存四区意义: 不同区域存放的数据,赋予不同的生命周期, 给我们更大的灵活编程 1.1 程序运行前 在程序编译后,生成了exe可执行程序,未执行该程序前分为两个区域 代码区: 存放 CPU 执行的机器指令 代码区是共享的,共享的目的是对于频繁被执行的程序,只需要在内存中有一份代码即可 代码区是只读的,使其只读的原因是防止程序意外地修改了它的指令 全局区: 全局变量和静态变量存放在此. 全局区还包含了常量区,...</div></div></div><div class="recent-post-item"><div class="post_cover"><a href="/2025/02/03/C++%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/" title="C++学习笔记"><img class="post-bg" src="https://raw.githubusercontent.com/Justtyn/Justyn-Images/refs/heads/main/2022-8-7/taotao.jpg" onerror="this.onerror=null;this.src='/image/404.png'" alt="C++学习笔记"></a></div><div class="recent-post-info"><a class="article-title" href="/2025/02/03/C++%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/" title="C++学习笔记">C++学习笔记</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2025-02-02T16:00:00.000Z" title="发表于 2025-02-03 00:00:00">2025-02-03</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/C/">C++</a></span><span class="article-meta tags"><span class="article-meta-separator">|</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/%E6%8A%80%E6%9C%AF/">技术</a><span class="article-meta-link">•</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/C/">C</a><span class="article-meta-link">•</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/C/">C++</a></span></div><div class="content">C++学习笔记一、基础知识1、goto 语句(不建议使用)作用: 可以无条件的跳转语句 语法: goto 标记; 解释: 如果标记的名称存在,执行到goto语句时,会跳转到标记的位置 12345678910int main() { cout << 1 << endl; cout << 2 << endl; goto FLAG; cout << 3 << endl; cout << 4 << endl; FLAG: cout << 5 << endl; return 0;} 2、一维数组一维数组名称的用途 可以统计整个数组在内存中的长度 可以获取数组在内存中的首地址 示例: 12345678910111213141516171819202122int main() { //数组名用途 //1、可以获取整个数组占用内存空间大小 int arr[10] = {...</div></div></div><div class="recent-post-item"><div class="post_cover"><a href="/2025/02/02/C++%E5%9F%BA%E7%A1%80%E5%85%A5%E9%97%A8/" title="C++基础"><img class="post-bg" src="https://raw.githubusercontent.com/Justtyn/Justyn-Images/refs/heads/main/2022-8-7/taotao.jpg" onerror="this.onerror=null;this.src='/image/404.png'" alt="C++基础"></a></div><div class="recent-post-info"><a class="article-title" href="/2025/02/02/C++%E5%9F%BA%E7%A1%80%E5%85%A5%E9%97%A8/" title="C++基础">C++基础</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2025-02-01T16:00:00.000Z" title="发表于 2025-02-02 00:00:00">2025-02-02</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/C/">C++</a></span><span class="article-meta tags"><span class="article-meta-separator">|</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/%E6%8A%80%E6%9C%AF/">技术</a><span class="article-meta-link">•</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/C/">C</a><span class="article-meta-link">•</span><i class="fas fa-tag"></i><a class="article-meta__tags" href="/tags/C/">C++</a></span></div><div class="content">C++基础1 C++初识1.1 第一个C++程序编写一个C++程序总共分为4个步骤 创建项目 创建文件 编写代码 运行程序 1.1.1 创建项目 Visual Studio是我们用来编写C++程序的主要工具,我们先将它打开 1.1.2 创建文件右键源文件,选择添加->新建项 给C++文件起个名称,然后点击添加即可。 1.1.3 编写代码1234567891011#include<iostream>using namespace std;int main() { cout << "Hello world" << endl; system("pause"); return 0;} 1.1.4 运行程序 1.2 注释作用:在代码中加一些说明和解释,方便自己或其他程序员程序员阅读代码 两种格式 单行注释:// 描述信息 通常放在一行代码的上方,或者一条语句的末尾,==对该行代码说明== 多行注释: /* 描述信息...</div></div></div><div class="recent-post-item"><div class="post_cover"><a href="/2025/02/01/SpringBoot-MarkDown-master/SpringBoot-%E7%AC%94%E8%AE%B0/" 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