java类和接口有什么区别 288.28KB

Q18600000000

资源文件列表:

java 类和接口有什么区别.zip 大约有1个文件

java 类和接口有什么区别.pdf 300.36KB

资源介绍:

java类和接口有什么区别，适合学生，初入职场人员学习，一步一步的，由浅入深的理解，掌握

<link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89736888/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89736888/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">jav<span class="_ _0"></span>a <span class="ff2 ls1">类和接口有什么区别</span> </div><div class="t m0 x2 h2 y2 ff1 fs0 fc1 sc1 ls0 ws0"> </div><div class="t m0 x2 h3 y3 ff3 fs1 fc0 sc2 ls0 ws0"> <span class="_"> </span> <span class="ff4 fs2 fc1">类和接口是<span class="_ _1"> </span><span class="ff3">Java<span class="_ _1"> </span></span>面向对象编程中两个核心概<span class="_ _2"></span>念，它们<span class="_ _2"></span>在定义、</span></div><div class="t m0 x2 h3 y4 ff4 fs2 fc1 sc2 ls0 ws0">用途和实现方式<span class="_ _2"></span>上存在显著区别。<span class="ff3"> </span></div><div class="t m0 x2 h4 y5 ff4 fs3 fc1 sc1 ls0 ws0">类的定义与<span class="_ _0"></span>特点<span class="ff5 sc2"> </span></div><div class="t m0 x2 h5 y6 ff4 fs4 fc1 sc2 ls2 ws0">类（<span class="_ _3"></span><span class="ff6 ls0">Class</span>）是<span class="_ _4"> </span><span class="ff6 ls0">Java<span class="_ _5"> </span><span class="ff4">中的一种基本数据类型，<span class="_ _6"></span>用于定义对象的模板或蓝<span class="_ _2"></span>图。<span class="_ _6"></span>它包含了</span></span></div><div class="t m0 x2 h5 y7 ff4 fs4 fc1 sc2 ls0 ws0">一组属性（成员变量）和方法（成员函数）<span class="_ _2"></span>，这些属性和方法共同描<span class="_ _2"></span>述了对象的状</div><div class="t m0 x2 h5 y8 ff4 fs4 fc1 sc2 ls0 ws0">态和行为。类的特点包括：<span class="ff6"> </span></div><div class="t m0 x3 h5 y9 ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">定义属性和方法<span class="sc2">：类定义了一组属性和方法，这些属性和方法描述了<span class="_ _2"></span>对象的特征和</span></span></span></div><div class="t m0 x2 h6 ya ff4 fs4 fc1 sc2 ls0 ws0">行为。<span class="ff9"> </span></div><div class="t m0 x3 h6 yb ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">封装性<span class="sc2">：类提供了封装性，通过将数据成员设置为私有（<span class="ff9">priv<span class="_ _2"></span>ate<span class="ff4">），并使用公共的</span></span></span></span></span></div><div class="t m0 x2 h6 yc ff9 fs4 fc1 sc2 ls0 ws0">gette<span class="_ _0"></span>r<span class="_"> </span><span class="ff4">和<span class="_ _1"> </span></span>setter<span class="_ _1"> </span><span class="ff4">方法来访问<span class="_ _0"></span>和修改<span class="_ _0"></span>数据，从<span class="_ _0"></span>而隐藏了实<span class="_ _0"></span>现细节并<span class="_ _0"></span>确保数据的完<span class="_ _0"></span>整性。<span class="_ _8"></span><span class="ff9"> </span></span></div><div class="t m0 x3 h5 yd ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">继承性<span class="sc2">：类可以继承其他类，从而重用和扩展现有代码。一个类只<span class="_ _2"></span>能直接继承一个</span></span></span></div><div class="t m0 x2 h6 ye ff4 fs4 fc1 sc2 ls0 ws0">父类（单继承），但可以通过接口实现多重<span class="_ _2"></span>继承的效果。<span class="ff9"> </span></div><div class="t m0 x3 h5 yf ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">实<span class="ls1">例化</span><span class="sc2">：类可以被实例化，即创建对象。对<span class="_ _2"></span>象是类的具体实例，具有<span class="_ _2"></span>类定义的属性</span></span></span></div><div class="t m0 x2 h6 y10 ff4 fs4 fc1 sc2 ls0 ws0">和方法。<span class="ff9"> </span></div><div class="t m0 x2 h4 y11 ff4 fs3 fc1 sc1 ls0 ws0">接口的定义<span class="_ _0"></span>与特点<span class="ff5 sc2"> </span></div><div class="t m0 x2 h5 y12 ff4 fs4 fc1 sc2 ls0 ws0">接口（<span class="ff6">Inter<span class="_ _2"></span>face<span class="ff4 ls3">）是<span class="_ _1"> </span></span>Jav<span class="_ _2"></span>a<span class="_"> </span><span class="ff4">中一种特殊的类<span class="_ _2"></span>型，<span class="_ _2"></span>用于定义一组方法规范，<span class="_ _2"></span>但不提供方</span></span></div><div class="t m0 x2 h5 y13 ff4 fs4 fc1 sc2 ls0 ws0">法的实现。接口的特点包括：<span class="ff6"> </span></div><div class="t m0 x3 h6 y14 ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">方法声明<span class="sc2">：接口只包含方法的声明（包括抽象方法和从<span class="_ _5"> </span><span class="ff9">Java 8<span class="_"> </span></span>开始引<span class="_ _2"></span>入的默认方法</span></span></span></div><div class="t m0 x2 h6 y15 ff4 fs4 fc1 sc2 ls0 ws0">和静态方法），不包含方法的实现。<span class="_ _2"></span><span class="ff9"> </span></div><div class="t m0 x3 h5 y16 ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">常量定义<span class="sc2">：接口中可以定义常量，这些常量默认是<span class="_ _5"> </span><span class="ffa fs6">public static final<span class="_ _9"> </span></span>的，且必须</span></span></span></div><div class="t m0 x2 h6 y17 ff4 fs4 fc1 sc2 ls0 ws0">在声明时初始化。<span class="ff9"> </span></div><div class="t m0 x3 h5 y18 ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">不能被实例化<span class="sc2">：接口不能被实例化，因为它不包含具体的实现。接口<span class="_ _2"></span>只能通过类来</span></span></span></div><div class="t m0 x2 h6 y19 ff4 fs4 fc1 sc2 ls0 ws0">实现（使用<span class="_ _5"> </span><span class="ffa fs6">implements<span class="_ _9"> </span></span>关键字）。<span class="ff9"> </span></div><div class="t m0 x3 h5 y1a ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">多重继承<span class="sc2">：一个类可以实现多个接口，从而实现多重继承的效果。<span class="_ _2"></span>这允许一个类同</span></span></span></div><div class="t m0 x2 h6 y1b ff4 fs4 fc1 sc2 ls0 ws0">时遵循多个行为规范。<span class="ff9"> </span></div><div class="t m0 x3 h5 y1c ff7 fs5 fc1 sc2 ls0 ws0"><span class="ff8"> <span class="_ _7"> </span><span class="ff4 fs4 sc1">公开性<span class="sc2">：接口中的所有成员<span class="_ _2"></span>（包括方法和常量<span class="_ _2"></span>）默认都是<span class="_ _5"> </span><span class="ffa fs6">pub<span class="_ _2"></span>lic<span class="_ _9"> </span><span class="ff4 fs4">的，无论是否在同</span></span></span></span></span></div><div class="t m0 x2 h6 y1d ff4 fs4 fc1 sc2 ls0 ws0">一个包中。<span class="ff9"> </span></div><div class="t m0 x2 h4 y1e ff4 fs3 fc1 sc1 ls0 ws0">类与接口的<span class="_ _0"></span>区别<span class="ff5 sc2"> </span></div><div class="c x4 y1f w2 h7"><div class="t m0 x5 h6 y20 ff9 fs4 fc2 sc2 ls0 ws0"> </div></div><div class="c x6 y1f w3 h7"><div class="t m0 x7 h6 y21 ff4 fs4 fc2 sc2 ls0 ws0">类（<span class="ff9">Class</span>）<span class="ff9"> </span></div></div><div class="c x8 y1f w4 h7"><div class="t m0 x9 h6 y21 ff4 fs4 fc2 sc2 ls0 ws0">接口（<span class="ff9">Interface</span>）<span class="ff9"> </span></div></div></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>

100+评论昵称:

captcha

类型	标题	大小	时间
	如何在Java中实现多重继承	278.67KB	7月前

	基于遗传算法的风电混合储能容量优化配置开发语言：matlab	102.67KB	7月前
	stm32C8T6 驱动mpu6050 网上代码扒下来的，自己又改了一部分希望有帮助实测通过	7.02MB	7月前
	基于多目标遗传算法的分布式电源选址定容研究关键词：分布式电源选址定容多目标遗传算法参考文档：《店主自写文档》基本复	71.85KB	7月前
	wincc高级报表，支持自定义模版，支持打印预览，支持打印PDF，支持导出Excel表格，支持自定义打印区域，可显示最大值，最小	1.54MB	7月前

	D.zip00000000000000000000000000000000	59.38MB	7月前
	在线实时入侵检测系统框架 vscode + apache + htm +css + jquery + php + pyt	4.27MB	7月前
	mac 小霸王游戏/红白机/街机模拟器 OpenEmu	37.72MB	7月前