Hey there! I totally get how frustrating it is when your run.bat file just flashes the command prompt and vanishes—especially when you're new to this kind of thing. Let's walk through this step by step with super simple explanations.

First: Make the Command Prompt Stay Open #

The main reason the window closes so fast is that once the command finishes (or hits an error), it automatically shuts down. We need to force it to stay open so we can see what's going wrong. Here's how:

• Right-click your run.bat file and select "Edit" (use Notepad or any basic text editor).
• Replace the existing line with this:

  java -jar Shimeji-ee.jar
  pause
  

• Save the file, then double-click it again. Now the window will stay open after running the command, showing you either success messages or error details.

Next: Troubleshoot Common Errors Based on the Output #

Once you can see the text in the prompt, here are the most common issues and fixes:

Error 1: "'java' is not recognized..." #

This means your computer doesn't have Java installed, or Java isn't set up to be found by command prompt.

• Fix: Install the Java Runtime Environment (JRE) for your system. When installing, make sure to check the box that says "Add Java to PATH" or similar (this lets command prompt find the java command easily).
• If you already installed Java but didn't check that box, you can manually add Java's bin folder to your system PATH:
  1. Right-click "This PC" → "Properties" → "Advanced system settings" → "Environment Variables".
  2. Under "System variables", find the PATH variable, click "Edit".
  3. Click "New" and paste the path to your Java bin folder (it usually looks like C:\Program Files\Java\jre1.8.0_XXX\bin—replace the XXX with your version number).
  4. Click "OK" on all windows to save changes.

Error 2: "Could not find or load main class..." or "Failed to load JAR file..." #

This happens when your run.bat file isn't in the same folder as Shimeji-ee.jar.

• Fix: Move the run.bat file into the exact same folder where Shimeji-ee.jar is located, then double-click it again.

Error 3: Other Less Common Issues #

If you see a different error message, write it down and it'll help narrow down the problem. For example, memory errors might mean you need to add a memory flag to the command, like java -Xmx512m -jar Shimeji-ee.jar (this allocates more memory to the program).

Alternative: Run the Command Manually #

If you don't want to edit the batch file, you can run the command directly in a command prompt window that stays open:

1. Press Win + R, type cmd, and hit Enter to open command prompt.
2. Type cd followed by the full path to your Shimeji folder (e.g., cd C:\Users\YourName\Desktop\ShimejiFolder) and hit Enter.
3. Type java -jar Shimeji-ee.jar and hit Enter. The window will stay open, showing you all output.

内容的提问来源于stack exchange，提问作者starcasm