java基础方法重写与多态

java基础方法重写与多态Java 多态重载 package model2 unit5 public class Person extends Object Override public String toString return Person name name

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Java多态重载

package model2.unit5;

public class Person extends Object {

    @Override

    public String toString() {

        return "Person{" +

                "name='" + name + ''' +

                ", age=" + age +

                '}';

    }

    public static void main(String[] args) {

        Person person = new Person("张三", 30);

        Person person2 = new Person("张三", 30);

        // Object类中toString方法默认实现:包.类@hash

        System.out.println(person.toString());

        System.out.println(person2.toString());

    }

    String name;

    int age;

    // 多态:重载。

    public Person() {

    }

    public Person(String name) {

        this.name = name;

    }

    public Person(String name, int age) {

        this.name = name;

        this.age = age;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

}

Java多态重写

package model2.unit5;

public class Car {

    void m(){

        System.out.println("父类的方法");

    }

}

class Audi extends Car {

    void m(){

        System.out.println("子类的方法");

    }

    public static void main(String[] args) {

        Audi a = new Audi();

        a.m();

java基础方法重写与多态

    }

}

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