方法重写

普通方法可以重写

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class Animal{
    public void eat(){
        System.out.println("animal eat");
    }
}
class Cat extends Animal{
    @Override
    public void eat() {
        System.out.println("cat eat");
    }
}

@Test
public void test2(){
    Animal animal = new Cat();
    animal.eat();
    animal=new Animal();
    animal.eat();
}

//运行结果：
//cat eat
//animal eat

静态方法不能重写

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class Person {
    public static void test() {
        System.out.println("Person");
    }
}

class Student extends Person {
    public static void test() {
        System.out.println("Student");
    }
}

@Test
public void test1(){
    Person p = new Student();
    p.test();
    p=new Person();
    p.test();
}

//运行结果：
//Person
//Person