课程: Java 8+ Essential Training: Objects and APIs
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Organize code with packages - Java教程
课程: Java 8+ Essential Training: Objects and APIs
Organize code with packages
- [Narrator] I've previously described how to use custom methods and classes to organize your code. But there's one more critical tool that you'll use to organize it even further, packages. A package is both a description of where a class is in the application and a location on the file system. For example, com.example.java means that there's a subdirectory of the source directory called com, and a subdirectory of that called example, and a subdirectory of that java, and that's the base package for my application. In your application, you should use reverse domain notation. That means you take an organization or personal domain and you switch it so if my web domain is davidgassner.com my package would start with com.davidgassner and then you would add something after that to identify the application. That makes it possible to have class identities that are universal and unique throughout the world of Java. Now within a single application, you can organize your classes with…
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About encapsulation3 分钟 46 秒
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Use the Java runtime classes4 分钟 45 秒
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Wrap code in static methods5 分钟 56 秒
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Declare and use custom classes4 分钟 9 秒
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Organize code with packages3 分钟 46 秒
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Create and use instance methods2 分钟 27 秒
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Manage state with instance variables7 分钟 31 秒
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Declare multiple constructor methods5 分钟 2 秒
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Use static fields as constants5 分钟 51 秒
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Declare and use enum types3 分钟 44 秒
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Organize code with nested types4 分钟 15 秒
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