http://metrics.dropwizard.io/metrics-core: Metrics is a Java library which gives you unparalleled insight into what your code does in production. Metrics provides a powerful toolkit of ways to measure the behavior of critical components in your production environment.
  • Coda Hale
  • Ryan Tenney
  • Artem Prigoda 
class com.codahale.metrics.Clock$UserTimeClockHolder
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.codahale.metrics.Clock$UserTimeClockHolder
  super_class: java.lang.Object
{
  private static final com.codahale.metrics.Clock DEFAULT;
    descriptor: Lcom/codahale/metrics/Clock;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 44
            new com.codahale.metrics.Clock$UserTimeClock
            dup
            invokespecial com.codahale.metrics.Clock$UserTimeClock.<init>:()V
            putstatic com.codahale.metrics.Clock$UserTimeClockHolder.DEFAULT:Lcom/codahale/metrics/Clock;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.codahale.metrics.Clock$UserTimeClockHolder this
         0: .line 43
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.codahale.metrics.Clock$UserTimeClockHolder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/codahale/metrics/Clock$UserTimeClockHolder;
}
SourceFile: "Clock.java"
NestHost: com.codahale.metrics.Clock
InnerClasses:
  public UserTimeClock = com.codahale.metrics.Clock$UserTimeClock of com.codahale.metrics.Clock
  private UserTimeClockHolder = com.codahale.metrics.Clock$UserTimeClockHolder of com.codahale.metrics.Clock