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项目未出现在Eclipse的资源管理器中

[英]Project not appearing in Eclipse's explorer

原文 2017-04-30 08:04:29 3 2 java/ eclipse

I am new to Java programming. 我是Java编程的新手。 Until now, all I was doing was writing the code on eclipse and running the code there only. 到目前为止，我所做的只是在eclipse上编写代码并仅在其中运行代码。 However this time i tried to write a code in text editor and run the same through following: 但是这一次我试图在文本编辑器中编写代码，并通过以下方式运行相同的代码：

I created a folder named TEMP3 in workspace. 我在工作区中创建了一个名为TEMP3的文件夹。 (I could see as well the folders of other projects that I directly created on eclipse.) （我还可以看到我直接在eclipse上创建的其他项目的文件夹。）
Created a hello.java file in text editor which outputs "Hello world" and saved that file in the folder TEMP3 created above. 在文本编辑器中创建了一个hello.java文件，该文件输出“ Hello world”，并将该文件保存在上面创建的文件夹TEMP3 。
Now I successfully compiled and run the file. 现在，我成功编译并运行了文件。
Now when I open eclipse, I expect to see the TEMP3 Project (and in there the hello class) in eclipse's Package Explorer. 现在，当我打开eclipse时，我希望可以在eclipse的Package Explorer中看到TEMP3项目（以及hello类）。

But I don't see the TEMP3 folder. 但是我看不到TEMP3文件夹。 Why is it so? 为什么会这样呢？

2 个解决方案

You could try to import your new folder "TEMP3" and then it should appears. 您可以尝试导入新文件夹“ TEMP3”，然后它应该出现。

I'm studying java from middle february 2017 and I can suggest you to use a correct package structure with right names. 我正在从2017年2月中旬开始研究Java，我可以建议您使用具有正确名称的正确软件包结构。 It helps a lot during programming. 在编程过程中有很大帮助。

Eclipse projects must contain at least a .project file for Eclipse to recognize them as a project. Eclipse项目必须至少包含一个.project文件，Eclipse才能将它们识别为项目。 The folder you have created doesn't contain this file so it isn't recognized. 您创建的文件夹不包含此文件，因此无法识别。

In addition to this Eclipse won't recognize a project added to the workspace externally until you do a 'File > Refresh'. 除此之外，除非您执行“文件>刷新”，否则Eclipse不会从外部识别添加到工作区的项目。

So the best bet is to create a Java project inside Eclipse in the normal way and then use 'Import > File System' to import the hello.java file. 因此，最好的选择是以常规方式在Eclipse中创建一个Java项目，然后使用“导入>文件系统”导入hello.java文件。

Note that the Eclipse Package and Project Explorers normally hide the .project file so you don't see it in Eclipse. 请注意，Eclipse包和项目浏览器通常会隐藏.project文件，因此您不会在Eclipse中看到它。 In addition on Linux and macOS the OS doesn't show files starting with '.' 此外，在Linux和macOS上，操作系统不会显示以“。”开头的文件。