P:\Users\KJ4IPS>"%JRE9%\bin\java" -jar C:\Standalone\minecraft.exe
Bootstrap started
Looking for update
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Got reply in: 362ms
No update found.
Reversing LZMA on P:\Users\KJ4IPS\AppData\Roaming\.minecraft\launcher.pack.lzma to P:\Users\KJ4IPS\AppData\Roaming\.minecraft\launcher.pack
Unpacking P:\Users\KJ4IPS\AppData\Roaming\.minecraft\launcher.pack to P:\Users\KJ4IPS\AppData\Roaming\.minecraft\launcher.jar
Cleaning up P:\Users\KJ4IPS\AppData\Roaming\.minecraft\launcher.pack
Starting launcher.
FATAL ERROR: java.lang.NoClassDefFoundError: com/sun/management/internal/GarbageCollectorExtImpl
        at sun.management.MemoryImpl.getMemoryManagers0(Native Method)
        at sun.management.MemoryImpl.getMemoryManagers(MemoryImpl.java:98)
        at sun.management.ManagementFactoryHelper.getGarbageCollectorMXBeans(ManagementFactoryHelper.java:130)
        at java.lang.management.DefaultPlatformMBeanProvider$4.nameToMBeanMap(DefaultPlatformMBeanProvider.java:185)
        at java.lang.management.ManagementFactory.lambda$getPlatformMBeanServer$0(ManagementFactory.java:478)
        at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:267)
        at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
        at java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1664)
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:505)
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:495)
        at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
        at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
        at java.lang.management.ManagementFactory.getPlatformMBeanServer(ManagementFactory.java:479)
        at org.apache.logging.log4j.core.jmx.Server.registerMBeans(Server.java:107)
        at org.apache.logging.log4j.core.impl.Log4jContextFactory.<init>(Log4jContextFactory.java:59)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:425)
        at java.lang.Class.newInstance(Class.java:464)
        at org.apache.logging.log4j.LogManager.<clinit>(LogManager.java:85)
        at net.minecraft.launcher.Launcher.<clinit>(Launcher.java:56)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:425)
        at net.minecraft.bootstrap.Bootstrap.startLauncher(Bootstrap.java:226)
        at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:112)
        at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:367)


Please fix the error and restart.