The Eclipse IDE is remarkably simple to install on a Windows 10 or 11 computer. To install Eclipse on Windows, simply follow the five steps outlined in this video: Download the Eclipse IDE zip file ...
Then, select “Open With” and “Java”. if you don’t have Java or the Java file doesn’t work, you will need to download Java 21. This is required for Minecraft 1.21.4 mods like OptiFine.