Java日志第22天 2020.7.27

类作为成员变量类型

public class Hero {

    private String name;
    private int age;
    private Weapon weapon;

    public Hero(){
    }

    public Hero(String name, int age, Weapon weapon) {
        this.name = name;
        this.age = age;
        this.weapon = weapon;
    }

    public void attack(){
        System.out.println(age+ "岁的" + name + "使用" + weapon.getWeaponName()+"进行攻击");
    }

    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;
    }

    public Weapon getWeapon() {
        return weapon;
    }

    public void setWeapon(Weapon weapon) {
        this.weapon = weapon;
    }
}

public class Weapon {

    private String weaponName;


    public Weapon(){
    }

    public Weapon(String weaponName){
        this.weaponName = weaponName;
    }

    public String getWeaponName() {
        return weaponName;
    }

    public void setWeaponName(String weaponName) {
        this.weaponName = weaponName;
    }
}

public class DemoMain {

    public static void main(String[] args) {
        Hero hero = new Hero();

        hero.setName("亚瑟");
        hero.setAge(15);

        hero.setWeapon(new Weapon("大宝剑"));

        hero.attack();
    }
}

结果如下：

接口作为成员变量类型

public interface Skill {
    public void realseSkill();
}

public class Hero {
    private String name;
    private Skill skill;

    public Hero(){
    }

    public Hero(String name, Skill skill) {
        this.name = name;
        this.skill = skill;
    }

    public void attack(){
        System.out.print(name + "使用");
        skill.realseSkill();

        System.out.println("释放技能完成！");
    }
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Skill getSkill() {
        return skill;
    }

    public void setSkill(Skill skill) {
        this.skill = skill;
    }
}

public class DemoMain {

    public static void main(String[] args) {
        Hero hero = new Hero();

        hero.setName("亚瑟");

        Skill skill = new Skill() {
            @Override
            public void realseSkill() {
                System.out.println("震雷削");
            }
        };
        hero.setSkill(skill);
        hero.attack();
    }
}

接口作为方法的参数或返回值

import java.util.ArrayList;
import java.util.List;

public class DemoInterface {
    public static void main(String[] args) {
        //左边是接口名称，右边是实现类名称，这是多态写法
        List<String> list = new ArrayList<>();

        list = addNames(list);

        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
        }
    }

    public static List<String> addNames(List<String> list){
        list.add("迪丽热巴");
        list.add("古力娜扎");
        list.add("马尔扎哈");
        list.add("沙扬娜拉");
        return list;
    }
}

结果如下：

 

今天的内容很简单，但应用到以前的知识还是很多的遗忘，有些代码的过程有些模糊用法。

不能这样啊啊，还是要多多复习，熟练掌握用法，不能应用到稍微复杂的案例是就搞不清用法。

明天开始Object这个最高父类的学习了！