2019年1月7日
第七章 虚拟机类加载机制
摘要： 目录 概述7.2 类加载的时机7.3 类加载的过程7.3.1 加载7.3.2 验证7.3.3 准备7.3.4 解析7.4 类加载器7.4.1 类与类加载器7.4.2 双亲委派类型概述 虚拟机把描述类的数据从class文件加载到内存，并对数据进行校验、转换解析... 阅读全文
posted @ 2019-01-07 18:38 strawqqhat 阅读(230) 评论(0) 推荐(0) 编辑
#home h1{ font-size:45px; } body{ background-image: url("放你的背景图链接"); background-position: initial; background-size: cover; background-repeat: no-repeat; background-attachment: fixed; background-origin: initial; background-clip: initial; height:100%; width:100%; } #home{ opacity:0.7; } .wall{ position: fixed; top: 0; left: 0; bottom: 0; right: 0; } div#midground{ background: url("https://i.postimg.cc/PP5GtGtM/midground.png"); z-index: -1; -webkit-animation: cc 200s linear infinite; -moz-animation: cc 200s linear infinite; -o-animation: cc 200s linear infinite; animation: cc 200s linear infinite; } div#foreground{ background: url("https://i.postimg.cc/z3jZZD1B/foreground.png"); z-index: -2; -webkit-animation: cc 253s linear infinite; -o-animation: cc 253s linear infinite; -moz-animation: cc 253s linear infinite; animation: cc 253s linear infinite; } div#top{ background: url("https://i.postimg.cc/PP5GtGtM/midground.png"); z-index: -4; -webkit-animation: da 200s linear infinite; -o-animation: da 200s linear infinite; animation: da 200s linear infinite; } @-webkit-keyframes cc { from{ background-position: 0 0; transform: translateY(10px); } to{ background-position: 600% 0; } } @-o-keyframes cc { from{ background-position: 0 0; transform: translateY(10px); } to{ background-position: 600% 0; } } @-moz-keyframes cc { from{ background-position: 0 0; transform: translateY(10px); } to{ background-position: 600% 0; } } @keyframes cc { 0%{ background-position: 0 0; } 100%{ background-position: 600% 0; } } @keyframes da { 0%{ background-position: 0 0; } 100%{ background-position: 0 600%; } } @-webkit-keyframes da { 0%{ background-position: 0 0; } 100%{ background-position: 0 600%; } } @-moz-keyframes da { 0%{ background-position: 0 0; } 100%{ background-position: 0 600%; } } @-ms-keyframes da { 0%{ background-position: 0 0; } 100%{ background-position: 0 600%; } }