Object orientated programming in java, how to make conditional private attributes? (without setters?).

FarmTest Farm Animal has-a (composition) is-a (inheritance) Chicken Cow Llama (A) the Animal class contains: o +1 Six private attributes: . name (String) - the animal's name * energy (double) - the animal's energy level (must be from 0 to 100). * alive (boolean) - true only when energy>0 . mealAmount (double) - the maximum amount of food the animal can eat when we call its eat method (must be from 0 to 100) * x and y (double) - the animal's location (no restrictions on the values). speedX and speedY (double) - the speed in x and y directions (no restrictions on the values). o +1 One zero-arg constructor that sets energy to 100 o Several public methods: [+2] Setters and getters for all attributes except alive which should have only a getter method e * Note the following: [+2] your code must respect the restrictions on the values as indicated above +2] The energy's setter method should also display a message whenever the animal is hungry, e.g. "Cowl is hungry", or starving, e.g. "Cowl is starving", where Cow1 is the animal's name. An animal is starving when its energy s 17 and it is hungry when its energy is between 17 and 50. e [+2] toString method that returns a string representation of the animal's status similar to the following format . Alive:true Name: Cow1 Energy 100.0 Location: (0.0,0.0) [+2] void move () : if the animal is alive, increment x by speedX and y by speedY, and decrement energy by 0.1. If the animal is dead, display a message to indicate that it is dead, e.g. "Cowl can't move. It is dead!" *