https://openjdk.java.net/ 
public interface sun.jvmstat.monitor.event.HostListener extends java.util.EventListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.jvmstat.monitor.event.HostListener
  super_class: java.lang.Object
{
  public abstract void vmStatusChanged(sun.jvmstat.monitor.event.VmStatusChangeEvent);
    descriptor: (Lsun/jvmstat/monitor/event/VmStatusChangeEvent;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      event  

  public abstract void disconnected(sun.jvmstat.monitor.event.HostEvent);
    descriptor: (Lsun/jvmstat/monitor/event/HostEvent;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      event  
}
SourceFile: "HostListener.java"