You can use UPnP PortMapper. Source code/Download. All you need is Java and that's it. Hope this helps. - Source: Reddit / about 1 year ago
I would definitely suggest installing Java for this one, and the error should have asked you to do so. I'll have to look into why that was not popping properly for you and address it in a bug fix. In the mean time, you can address the issue by going here to install Java: https://java.com/en/. - Source: Reddit / about 1 year ago
Https://java.com/en/ Is this the java you're using to install optifine. When I first got optifine I thought java meant Minecraft and not java. - Source: Reddit / over 1 year ago
I had this problem before just go to https://java.com/en/ and download the java then you will have to install the actual java, then after its installed go to This PC then Windows then Program Files then Java then go to the file name file name that show I think when you downloaded it then go into bin and you will find a java.exe file then click it and World Painter will install and that's who I solved king problem... - Source: Reddit / over 1 year ago
Java, Adobe Reader, Handbrake (great for converting and adjusting videos). - Source: Reddit / over 1 year ago
I see you are using a correct version of Java, which is Java 8, but go and download the newer update for Java at Java.com. Use this walk through to change your Java to what you just downloaded for MultiMC. Scroll down to "Setting up Java in MultiMC." Start from where you pick your instances of Mincraft and follow the arrows on the picture. - Source: Reddit / over 1 year ago
Aright. So first step is make sure you have downloaded Java se here , open it, then go to the optifine download and open that up real quick. There should now be an installation in the launcher called optifine (your version). Let me know if it works! - Source: Reddit / almost 2 years ago
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