General Discussion

Look at how Minecraft handles the double-tap to sprint functionality (search for GameSettings#keyBindSprint).

yes tried again soo the same thing happend  

hello guys, I had some problems with the istalation of Minecratf Forge 1.12.2, the version is "forge-1.12.2-14.23.5.2768-installer-win", downloaded by the official website, URL: "Forge 1.12.2",so if someone can help me, I'll be happy, you know I've uninstalled and installed so many times that I don't even know anymore, this "Crash Log" is appearing ( image below), and I can't understand, it seems strange because it talks about missing something, or something (Installer log bellow and luncher log too)installer.loglauncher_log.txt  

Im making something like double jump and the thing is that it conflict with jumping when player holds space it fire multiple times. So I wanted to make it so player need to press space again to fire multi jump.

Did you look at the code like I told you to? The class of your block is entirely irrelevant.