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本文翻译自javaworld，英文原文链接https://www.javaworld.com/article/3272244/what-is-the-jvm-introducing-the-java-virtual-machine.htmlJava虚拟机的使用和定义Java虚拟机有两个主要功能：允许Java程序在任何设备和操作系统上运行("Write once,run anywhere"-...

本文翻译自javaworld，英文原文链接https://www.javaworld.com/article/3296360/what-is-the-jdk-introduction-to-the-java-development-kit.html简单介绍JDK是Java开发中用到的三个核心技术包之一，其他两个是JRE和JVM。理解三者之间的区别与联系是非常重要的。JVM是执行java...

本文翻译自javaworld.com，英文原文链接https://www.javaworld.com/article/2986341/6-things-all-good-software-code-has-in-common.html?upd=1556447989020现在世界上有很多很多的代码；让人惊讶的是，仅仅谷歌自己的存储库中就有超过20亿行代码。但是并不是所有的代码都是以相同的方式创建...

学习四种类型的多态，并开始使用子类型多态执行一个方法的不同形式。

If a colleague were to say to you,"Spouse of me this night today manufactures the unusual meal in a home. You will join?"three things would likely corss your mind: third,that you had been invited to d...

The traditional way for a class to allow a client to obtain an instance is to provide a public consructor.There is another technique that should be a part of every programmer's toolkit.A class can pro...