ERROR: Could not find or load main class

[MrCatPlays]

I'm trying to figure out how to download Minecraft Forge, and I keep on getting this error "

Error: Could not find or load main class .net.preferIPv4Stack=true

" when I type in "

java -Djava.net.preferIPv4Stack=true -jar forge-1.14.4-28.1.104-installer

".

 

Another issue is that it saved as a "Windows Media Player " file instead of whatever it should be, (I'm using a Windows 10 laptop).

 

Please help! I'm super excited to get this figured out with you guys.

Edited December 9, 2019 by MrCatPlays
Type of software input

[MrCatPlays]

Then how should the code look? Like this? 

java -jar forge-1.14.4-28.1.104-installer

[MrCatPlays]

Awesome! I tried the jarfix thing and it worked! Now what do I need to do? Like to insert Optifine?

[MrCatPlays]

Nevermind, I got WikiHow to help, thanks for the help though! You really did help me