https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/ Recent content in JavaSE基础 on 杨刚的个人网站 Hugo -- gohugo.io zh Copyright © 2018-2025 GradyYoung. All rights reserved. Wed, 12 Feb 2025 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/230f6847/ Sat, 11 Nov 2023 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/230f6847/ <h2 class="relative group">java基础知识图解 <div id="java基础知识图解" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#java%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e5%9b%be%e8%a7%a3" aria-label="锚点">#</a> </span> </h2> <p> <figure> <img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="low" alt="说明: untitle.png" data-zoom-src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/230f6847/image/202109181111062.jpg" src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/230f6847/image/202109181111062.jpg"> </figure> </p> https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/447cf7f6/ Fri, 19 Jan 2024 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/447cf7f6/ <h2 class="relative group">关键字与保留字 <div id="关键字与保留字" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e5%85%b3%e9%94%ae%e5%ad%97%e4%b8%8e%e4%bf%9d%e7%95%99%e5%ad%97" aria-label="锚点">#</a> </span> </h2> <h3 class="relative group">关键字 <div id="关键字" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e5%85%b3%e9%94%ae%e5%ad%97" aria-label="锚点">#</a> </span> </h3> <p>定义：被Java语言赋予了特殊含义，用做专门用途的字符串（单词）</p> https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/3427b306/ Fri, 19 Jan 2024 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/3427b306/ <h2 class="relative group">程序流程控制 <div id="程序流程控制" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e7%a8%8b%e5%ba%8f%e6%b5%81%e7%a8%8b%e6%8e%a7%e5%88%b6" aria-label="锚点">#</a> </span> </h2> <p> <figure> <img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="low" alt="说明: untitle.png" data-zoom-src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/3427b306/image/202109181115362.jpg" src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/3427b306/image/202109181115362.jpg"> </figure> </p> https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/2192a2c5/ Thu, 04 Jan 2024 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/2192a2c5/ <h2 class="relative group">数组的概述 <div id="数组的概述" 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group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e5%86%85%e5%ae%b9%e7%9a%84%e4%b8%89%e6%9d%a1%e4%b8%bb%e7%ba%bf" aria-label="锚点">#</a> </span> </h2> <p><strong>1.Java类及类的成员：属性、方法、构造器；代码块、内部类</strong></p> https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/66d6513f/ Fri, 19 Jan 2024 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/66d6513f/ <h2 class="relative group">关键字：static（静态） <div id="关键字static静态" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e5%85%b3%e9%94%ae%e5%ad%97static%e9%9d%99%e6%80%81" aria-label="锚点">#</a> </span> </h2> <h3 class="relative group">作用范围 <div id="作用范围" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e4%bd%9c%e7%94%a8%e8%8c%83%e5%9b%b4" aria-label="锚点">#</a> </span> </h3> <p>可以用来修饰的结构：主要用来修饰类的内部结构</p> https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/ee390caf/ Fri, 19 Jan 2024 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/ee390caf/ <h2 class="relative group">interface接口 <div id="interface接口" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#interface%e6%8e%a5%e5%8f%a3" aria-label="锚点">#</a> </span> </h2> <p><strong>接口，实际上可以看做是一种规范</strong></p> https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/c0828172/ Wed, 12 Feb 2025 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/c0828172/ <h2 class="relative group">异常的体系结构 <div id="异常的体系结构" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e5%bc%82%e5%b8%b8%e7%9a%84%e4%bd%93%e7%b3%bb%e7%bb%93%e6%9e%84" aria-label="锚点">#</a> </span> </h2> <ul> <li><code>java.lang.Throwable</code> <ul> <li><code>java.lang.Error</code>：一般不编写针对性的代码进行处理，发生后，会直接导致JVM不可处理。</li> <li><code>java.lang.Exception</code>：可以进行异常的处理 <ul> <li>编译时异常(<strong>checked受检异常</strong>) <ul> <li><code>IOException</code> <ul> <li><code>FileNotFoundException</code></li> </ul> </li> <li><code>ClassNotFoundException</code></li> </ul> </li> <li>运行时异常(<strong>unchecked非受检异常</strong>，<code>RuntimeException</code>) <ul> <li><code>NullPointerException</code></li> <li><code>ArrayIndexOutOfBoundsException</code></li> <li><code>ClassCastException</code></li> <li><code>NumberFormatException</code></li> <li><code>InputMismatchException</code></li> <li><code>ArithmeticException</code></li> </ul> </li> </ul> </li> </ul> </li> </ul> <p> <figure> <img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="low" alt="说明: untitle.png" data-zoom-src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/c0828172/image/202109181147955.gif" src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/c0828172/image/202109181147955.gif"> </figure> </p> https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/747f63d4/ Thu, 14 Dec 2023 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/747f63d4/ <h2 class="relative group">Java中的JUnit单元测试 <div id="java中的junit单元测试" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#java%e4%b8%ad%e7%9a%84junit%e5%8d%95%e5%85%83%e6%b5%8b%e8%af%95" aria-label="锚点">#</a> </span> </h2> <p>Java原生并没有提供单元测试的方法，一般的简单测试使用<code>main</code>方法进行测试，但是如果对于复杂的测试，则需要使用第三方框架来实现，例如<code>JUnit</code>框架</p> https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/930c988f/ Sat, 11 Nov 2023 00:00:00 +0000 https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/930c988f/ <p> <figure> <img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="low" alt="说明: AElFTkSuQmCC.png" data-zoom-src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/930c988f/image/202109181145252.gif" src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/930c988f/image/202109181145252.gif"> </figure> </p> <p> <figure> <img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="low" alt="说明: untitle.png" data-zoom-src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/930c988f/image/202109181145178.gif" src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/930c988f/image/202109181145178.gif"> </figure> </p> <p> <figure> <img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="low" alt="说明: untitle.png" data-zoom-src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/930c988f/image/202109181145169.gif" src="https://www.ygang.top/posts/3ab7256e/80aacaea/f742d77f/930c988f/image/202109181145169.gif"> </figure> </p> <h2 class="relative group">冒泡排序 <div id="冒泡排序" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e5%86%92%e6%b3%a1%e6%8e%92%e5%ba%8f" aria-label="锚点">#</a> </span> </h2> <h3 class="relative group">思想： <div id="思想" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700 !no-underline" href="#%e6%80%9d%e6%83%b3" aria-label="锚点">#</a> </span> </h3> <p>1、一个无序的数组，n个元素，一共需要排序n-1轮</p>