I am having a problem that I do not know how to get time of of an entity (breeding time, dropping items time...)? I would greatly appreciated your help!

You mean how long the entity has existed?

Here are a couple of "time" variables from the Entity class along with a few sub-classes

• Entity::ticksExisted (public)
  • The age of the Entity
• EntityLivingBase::hurtTime (public)
  • The amount of time an entity should render as hurt (red tint after being attacked)
• EntityLivingBase::deathTime (public)
  • The amount of time remaining this entity should act 'dead', i.e. have a corpse in the world
• EntityAnimal::inLove (private & Getter-less)
  • The amount of time that an animal will be able to mate after being given breeding items

For the inLove variable in EntityAnimal, you will need to use Reflection to "unlock" it, and store that reference somewhere (as Reflection is relatively costly to do over and over again)

"dropping items time", is an unfamiliar term. A few mods out there, like Botania, adds Shedding, but that functionality does not exist in Vanilla Minecraft, nor base Forge.

4 hours ago, Matryoshika said:

Here are a couple of "time" variables from the Entity class along with a few sub-classes

• Entity::ticksExisted (public)
  • The age of the Entity
• EntityLivingBase::hurtTime (public)
  • The amount of time an entity should render as hurt (red tint after being attacked)
• EntityLivingBase::deathTime (public)
  • The amount of time remaining this entity should act 'dead', i.e. have a corpse in the world
• EntityAnimal::inLove (private & Getter-less)
  • The amount of time that an animal will be able to mate after being given breeding items

For the inLove variable in EntityAnimal, you will need to use Reflection to "unlock" it, and store that reference somewhere (as Reflection is relatively costly to do over and over again)

"dropping items time", is an unfamiliar term. A few mods out there, like Botania, adds Shedding, but that functionality does not exist in Vanilla Minecraft, nor base Forge.

 Thanks!