minecraft forge/java 1.8 error (minecraft crashes) [closed]

this is what it shows:

[16:01:31] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[16:01:31] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[16:01:31] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[16:01:31] [main/INFO] [FML]: Forge Mod Loader version 7.2.211.1121 for Minecraft 1.7.2 loading
[16:01:31] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_25, running on Windows 7:amd64:6.1, installed at C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25
[16:01:31] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[16:01:31] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[16:01:31] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[16:01:31] [main/ERROR] [LaunchWrapper]: Unable to launch
java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) ~[?:1.8.0_25]
    at java.util.ArrayList$Itr.remove(ArrayList.java:865) ~[?:1.8.0_25]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

I already uninstalled java 8 from my computer. I don't know why or how it detects it. I've already downgraded to java 7 just so you know.

EDIT: I think I've found the problem. Minecraft keeps creating the java 1.8 runtime environment thingy instead of the java 1.7 each time I start Minecraft and I can't get rid of it by normal means (permanently deleting it in the recycle bin).

minecraft-java-edition minecraft-forge

Best Answer

The newer launcher "keeps and maintains" it's own java. What you have to do is go to "Edit profile," and in the "Executable," box enter the installed version of java. (ex. C:\Program Files (x--)\Java\Jre-.-.-\bin\javaw.exe or java.exe)

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How do I fix Minecraft Forge crashes?

How to Fix Minecraft Forge Installation Problem

Check Minecraft Forge Version.

Update Java on Your Computer.

Temporarily Disable Your Security Firewall.

Reinstall Java on Your Computer.

Use Command Prompt to Launch the Installer.

Check Your Internet Connection.

How do you fix Minecraft crashes in Java?

The most common cause of crashes are mods, preexisting bugs, and updates. Attempting to modify the files of Minecraft or individual worlds, even with advanced editors, can also cause crashes. Crashes can also be caused by bugs in the game.

How To Fix Minecraft Java Edition Exit Code: 1 Error?

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