How to use

identityHashCode

method

in

java.lang.System

 /**
  * Returns a string representation of this label.
  *
  * @return a string representation of this label.
  */
 @Override
 public String toString() {
  return "L" + System.identityHashCode(this);
 }
}

@Override
public int hashCode() {
 return System.identityHashCode(this);
}

@Override
protected int doHash(Object o) {
 return System.identityHashCode(o);
}

 int identityHashCode(Object object) {
  return System.identityHashCode(object);
 }
}

@Override
public int hashCode() {
 return System.identityHashCode(this);
}

private static String getServerSideCallbackServiceCacheKey(Channel channel, String interfaceClass, int instid) {
  return Constants.CALLBACK_SERVICE_PROXY_KEY + "." + System.identityHashCode(channel) + "." + interfaceClass + "." + instid;
}

private static String getServerSideCountKey(Channel channel, String interfaceClass) {
  return Constants.CALLBACK_SERVICE_PROXY_KEY + "." + System.identityHashCode(channel) + "." + interfaceClass + ".COUNT";
}

private static String getServerSideCountKey(Channel channel, String interfaceClass) {
  return Constants.CALLBACK_SERVICE_PROXY_KEY + "." + System.identityHashCode(channel) + "." + interfaceClass + ".COUNT";
}

private static String getServerSideCallbackServiceCacheKey(Channel channel, String interfaceClass, int instid) {
  return Constants.CALLBACK_SERVICE_PROXY_KEY + "." + System.identityHashCode(channel) + "." + interfaceClass + "." + instid;
}

/**
 * Return a hex String form of an object's identity hash code.
 * @param obj the object
 * @return the object's identity code in hex notation
 */
public static String getIdentityHexString(Object obj) {
  return Integer.toHexString(System.identityHashCode(obj));
}

@Override
public final int hashCode() {
 return (31 + method.hashCode()) * 31 + System.identityHashCode(target);
}

public static String toShortString(Object obj) {
  if (obj == null) {
    return "null";
  }
  return obj.getClass().getSimpleName() + "@" + System.identityHashCode(obj);
}

public static String toShortString(Object obj) {
  if (obj == null) {
    return "null";
  }
  return obj.getClass().getSimpleName() + "@" + System.identityHashCode(obj);
}

  @Override
  public int hashCode() {
    return System.identityHashCode(this);
  }
};

/**
 * Return the description for the given Resource; if the description is
 * empty, return the class name of the resource plus its identity hash code.
 * @see org.springframework.core.io.Resource#getDescription()
 */
private static String getNameForResource(Resource resource) {
  String name = resource.getDescription();
  if (!StringUtils.hasText(name)) {
    name = resource.getClass().getSimpleName() + "@" + System.identityHashCode(resource);
  }
  return name;
}

@Override
public int hashCode() {
 return System.identityHashCode(s);
}

 private static String lenientToString(@Nullable Object o) {
  try {
   return String.valueOf(o);
  } catch (Exception e) {
   // Default toString() behavior - see Object.toString()
   String objectToString =
     o.getClass().getName() + '@' + Integer.toHexString(System.identityHashCode(o));
   // Logger is created inline with fixed name to avoid forcing Proguard to create another class.
   Logger.getLogger("com.google.common.base.Strings")
     .log(WARNING, "Exception during lenientFormat for " + objectToString, e);
   return "<" + objectToString + " threw " + e.getClass().getName() + ">";
  }
 }
}

@Override
public int compareTo(ChannelGroup o) {
  int v = name().compareTo(o.name());
  if (v != 0) {
    return v;
  }
  return System.identityHashCode(this) - System.identityHashCode(o);
}

@SuppressWarnings("unchecked")
@Override
protected <T> Invoker<T> doSelect(List<Invoker<T>> invokers, URL url, Invocation invocation) {
  String methodName = RpcUtils.getMethodName(invocation);
  String key = invokers.get(0).getUrl().getServiceKey() + "." + methodName;
  int identityHashCode = System.identityHashCode(invokers);
  ConsistentHashSelector<T> selector = (ConsistentHashSelector<T>) selectors.get(key);
  if (selector == null || selector.identityHashCode != identityHashCode) {
    selectors.put(key, new ConsistentHashSelector<T>(invokers, methodName, identityHashCode));
    selector = (ConsistentHashSelector<T>) selectors.get(key);
  }
  return selector.select(invocation);
}

@SuppressWarnings("unchecked")
@Override
protected <T> Invoker<T> doSelect(List<Invoker<T>> invokers, URL url, Invocation invocation) {
  String methodName = RpcUtils.getMethodName(invocation);
  String key = invokers.get(0).getUrl().getServiceKey() + "." + methodName;
  int identityHashCode = System.identityHashCode(invokers);
  ConsistentHashSelector<T> selector = (ConsistentHashSelector<T>) selectors.get(key);
  if (selector == null || selector.identityHashCode != identityHashCode) {
    selectors.put(key, new ConsistentHashSelector<T>(invokers, methodName, identityHashCode));
    selector = (ConsistentHashSelector<T>) selectors.get(key);
  }
  return selector.select(invocation);
}