Так вообще можно делать?

package com.javarush.task.task05.task0510;

/*
Кошкоинициация
*/

public class Cat {
    private String name = null, color = "", address = null;
    private int weight = 4, age = 4;

    public void initialize(String name){
        this.name = name;
        this.color = this.color;
        this.weight = this.weight;
        this.age = this.age;
    }

    public void initialize(String name, int weight, int age){
        this.name = name;
        this.weight = weight;
        this.age = age;
    }

    public void initialize(String name, int age){
        this.name = name;
        this.age = age;
        this.weight = this.weight;
        this.color = this.color;
    }

    public void initialize(int weight, String color){
        this.weight = weight;
        this.color = color;
        this.age = this.age;
    }

    public void initialize(int weight, String color, String address){
        this.weight = weight;
        this.color = color;
        this.address = address;
        this.age = this.age;
    }

    public static void main(String[] args) {

    }
}