bash 如何从命令行运行 intellij Java 项目？
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How do i run an intellij Java project from command line?
提问by David T.
In Intellij, when i run a java project (via CTRL+SHIFT+F10) on the class that has a public static void mainmethod, the project runs as expected. Now, i want to run this same file/project, but on the command line. Furthermore, i want to be able to update this file and re-run it.
在 Intellij 中，当我在具有public static void main方法的类上运行 java 项目（通过 CTRL+SHIFT+F10）时，该项目按预期运行。现在，我想在命令行上运行这个相同的文件/项目。此外，我希望能够更新此文件并重新运行它。
I copied the command that Intellij outputs into the console, and i stuck that command on the terminal. the command looks something like this:
我将 Intellij 输出的命令复制到控制台中，并将该命令粘贴在终端上。命令看起来像这样：
/Library/Java/JavaVirtualMachines/jdk1.7.0_71.jdk/Contents/Home/bin/java -Didea.launcher.port=7532 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA 14 CE.app/Con...... (it's an insanely long command)
/Library/Java/JavaVirtualMachines/jdk1.7.0_71.jdk/Contents/Home/bin/java -Didea.launcher.port=7532 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA 14 CE.app/Con......（这是一个非常长的命令）
Let's say my file looks like this:
假设我的文件如下所示：
public class Main {
public static void main(String...args){System.out.println("hi");}
}
==> outputs "hi" when i run the command.
==> 当我运行命令时输出“hi”。
While this command runs just fine on terminal, it does NOT pick up any updates to the file. if i save the file, the previous cached files are run.
虽然此命令在终端上运行得很好，但它不会获取文件的任何更新。如果我保存文件，则运行以前的缓存文件。
i.e. let's say now i modify the file to be:
即让我们说现在我将文件修改为：
public class Main {
public static void main(String...args){System.out.println("GOOD BYE");}
}
==> the output is still "hi". even if i save the file.
==> 输出仍然是“嗨”。即使我保存了文件。
I'm running the command from home directory.
我正在从主目录运行命令。
How do i get the command to pick up my changes?
我如何获得命令来获取我的更改？
If i run again from intellij with the updated file, it gives the same command as previously (well, other than the port changes).
如果我使用更新后的文件再次从 intellij 运行，它会提供与以前相同的命令（好吧，除了端口更改）。
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Update:
更新：
okay, it looks like the command is running just a .class file. But i still can't see the commands used to build the .class file. how do i do this?
好的，看起来该命令只是在运行一个 .class 文件。但是我仍然看不到用于构建 .class 文件的命令。我该怎么做呢？
回答by Peter Lawrey
You need to rebuild the project before running it if you want to see your changes. You can use javacbut I suggest you use a build tool like maven or gradle.
如果要查看更改，则需要在运行之前重建项目。您可以使用，javac但我建议您使用 maven 或 gradle 之类的构建工具。
Once you have rebuilt your project you can run the latest build.
重建项目后，您可以运行最新版本。
You can also create a script which first compiles your program before it runs it like IntelliJ does.
您还可以创建一个脚本，它首先编译您的程序，然后像 IntelliJ 一样运行它。
