继承

public class Animal{
	public static void main(String[]args){
		Cat2 cat2 = new Cat2();//创建一个Cat2对象
		System.out.println(cat2.hobby);
	}
}
class Cat1{//父类
	String name = "大花猫";
	String hobby = "鱼" ;
}
class Cat2 extends Cat1{//子类
	String name = "小花猫";
}