If you try to launch minecraft 1.12.2 (and older I think) you will get this error:
Exception in thread "main" java.lang.UnsatisfiedLinkError: no lwjgl64 in java.library.path: [natives_path_here]
at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2429)
at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:818)
at java.base/java.lang.System.loadLibrary(System.java:1989)
at org.lwjgl.Sys$1.run(Sys.java:72)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
at org.lwjgl.Sys.doLoadLibrary(Sys.java:66)
at org.lwjgl.Sys.loadLibrary(Sys.java:87)
at org.lwjgl.Sys.<clinit>(Sys.java:117)
at bib.I(SourceFile:2825)
at net.minecraft.client.main.Main.main(SourceFile:38)
If you try to launch minecraft 1.12.2 (and older I think) you will get this error: