更改打开jar时首先运行哪个Java文件

Question

I'm not entirely sure how to word this but how would I go about changing which java file in my package is the first one to open when the compiled jar file is executed?

I'm also using netbeans if that helps.

Answer 1

You can changed it in Netbeans. When you run the whole project in netbeans, the first class that is executed there is also the first class to be executed in the jar file built by Netbeans.

You can right click your project in the project window and select Properties. From the window that opens, select the run category in the left side. Then on the right side, there is a button to browse and select the file for the Main Class.

Answer 2

The manifest indicates the Main-Class that runs when you execute a jar file.

https://docs.oracle.com/javase/tutorial/deployment/jar/appman.html

Answer 3

If you have two (or more) classes with public static void main , click File | Project properties and in the Categories dialog, click Run and look for Main Class: . and then click Browse... to select which main class to start with.

(But I'm not sure this answers what you really want to do since once compiled with the chosen main class, there's no way to later have the .jar file run another class. If this doesn't answer your question, maybe a good question in return is, "What are you trying to do?")