继承与多态

public class Animal {
	String name = "Animal name";
	static String NAME = "ANIMAL NAME";
	public static void RUN(){
		System.out.println("this is Animal static RUN .");
	}
	public void run(){
		System.out.println("this is Animal run .");
	}
}

 

2、子类（Dog）

 String name = "Dog name";
	static String NAME = "DOG NAME";
	int eye = 2;
	public static void RUN(){
		System.out.println("this is Dog static RUN .");
	}
	public void run(){
		System.out.println("this is Dog run .");
	}	

 

 

3、测试

public static void main(String[] args) {
		
		Animal dog = new Dog();
		/**
		 * 变量与静态方法与声明的类绑定
		 */
		System.out.println(dog.name);  // Animal name
		System.out.println(dog.NAME);  // ANIMAL NAME
		System.out.println(dog.eye);   // 报错，访问不到
		dog.RUN();  // this is Animal static RUN .
		/**
		 * 实例方法与定义的类绑定
		 */
		dog.run();	// this is Dog run .
	}