Invalid service: net.imagej.legacy.LegacyService

[MurphyHou123]

It can't run with error for all demos:
Exception in thread "main" java.lang.IllegalArgumentException: Invalid service: net.imagej.legacy.LegacyService
at org.scijava.service.ServiceHelper.createExactService(ServiceHelper.java:278)
at org.scijava.service.ServiceHelper.loadService(ServiceHelper.java:229)
at org.scijava.service.ServiceHelper.loadService(ServiceHelper.java:192)
at org.scijava.service.ServiceHelper.loadServices(ServiceHelper.java:164)
at org.scijava.Context.(Context.java:285)
at org.scijava.Context.(Context.java:234)
at org.scijava.Context.(Context.java:174)
at org.scijava.Context.(Context.java:160)
at net.imagej.ImageJ.(ImageJ.java:75)
at SwingExample.main(SwingExample.java:20)
Caused by: java.lang.ExceptionInInitializerError
at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized0(Native Method)
at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized(Unsafe.java:1160)
at java.base/jdk.internal.reflect.MethodHandleAccessorFactory.ensureClassInitialized(MethodHandleAccessorFactory.java:300)
at java.base/jdk.internal.reflect.MethodHandleAccessorFactory.newConstructorAccessor(MethodHandleAccessorFactory.java:103)
at java.base/jdk.internal.reflect.ReflectionFactory.newConstructorAccessor(ReflectionFactory.java:200)
at java.base/java.lang.reflect.Constructor.acquireConstructorAccessor(Constructor.java:547)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:497)
at java.base/java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128)
at java.base/jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:304)
at java.base/java.lang.Class.newInstance(Class.java:685)
at org.scijava.service.ServiceHelper.createServiceRecursively(ServiceHelper.java:300)
at org.scijava.service.ServiceHelper.createExactService(ServiceHelper.java:267)
... 9 more
Caused by: java.lang.RuntimeException: No _hooks field found in ij.IJ
It appears that this class was already defined in the class loader!
Please make sure that you initialize the LegacyService before using
any ImageJ 1.x class. You can do that by adding this static initializer:

static {
	LegacyInjector.preinit();
}

I tried to add LegacyInjector.preinit(); but still failed.

[sean-leichtle]

@MurphyHou123 Have you tried a 1.8 JDK?