（java总结）自定义类和接口作为成员变量，成员方法或返回值

淡淡的烟草味﹌ 2023-05-29 13:02 12阅读 0赞

package Demo23;
    /*
    自己定义的类也可以作为成员变量
     */
    public class Hero {
        
        private String name;//英雄名字
        private Weapon weapon;//武器
        private int age;//年龄
    
        public Hero() {
        
        }
    
        public Hero(String name, Weapon weapon, int age) {
        
            this.name = name;
            this.weapon = weapon;
            this.age = age;
        }
    
        public void attack(){
        
            System.out.println("年龄为" + age + "的" +name +  "用" + weapon.getCode() + "攻击敌方");
        }
    
        public String getName() {
        
            return name;
        }
    
        public void setName(String name) {
        
            this.name = name;
        }
    
        public Weapon getWeapon() {
        
            return weapon;
        }
    
        public void setWeapon(Weapon weapon) {
        
            this.weapon = weapon;
        }
    
        public int getAge() {
        
            return age;
        }
    
        public void setAge(int age) {
        
            this.age = age;
        }
    }

package Demo23;
    
    public class DemoMain {
        
        public static void main(String[] args) {
        
            //创建一个英雄角色
            Hero hero = new Hero();
    
            //起名字，设置年龄
            hero.setName("盖伦");
            hero.setAge(20);
    
            Weapon weapon = new Weapon("多兰剑");
            //为英雄配武器
            hero.setWeapon(weapon);
            hero.attack();
        }
    }

package Demo23;
    
    public class Weapon {
        
        private String code;//武器的代号
    
        public Weapon() {
        
        }
    
        public Weapon(String code) {
        
            this.code = code;
        }
    
        public String getCode() {
        
            return code;
        }
    
        public void setCode(String code) {
        
            this.code = code;
        }
    }

package Demo23;
    //自定义的接口作为成员变量名称
    public class Hero1 {
        
        private String name;
        private Skill skill;
    
        public Hero1() {
        
        }
    
        public Hero1(String name, Skill skill) {
        
            this.name = name;
            this.skill = skill;
        }
    
        public void attack(){
        
            System.out.println("我叫" + name + ", 开始释放技能");
            skill.use();
            System.out.println("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;
        }
    }

package Demo23;
    
    public class DemoGameMain {
        
        public static void main(String[] args) {
        
            Hero1 hero = new Hero1();
            hero.setName("艾希");
    
            hero.setSkill(new SkillImpl());//使用单独定义的实现类
    
            //还可以改成使用匿名内部类
           Skill skill = new Skill(){
        
    
               @Override
               public void use() {
        
                   System.out.println("Pia`Pia`pia");
               }
           };
           hero.setSkill(skill);
    
           //同时使用匿名内部类和匿名对象
            hero.setSkill(new Skill() {
        
                @Override
                public void use() {
        
                    System.out.println("bababba");
                }
            });
    
    
    
            hero.attack();
        }
    }

package Demo23;
    
    public class SkillImpl implements Skill {
        
        @Override
        public void use() {
        
            System.out.println("Biu Biu Biu");
        }
    }

package Demo23;
    
    public interface Skill {
        
    
        void use();//释放技能的抽象方法
    }

package Demo23;
    
    import java.util.ArrayList;
    import java.util.List;
    /*
    java.util.List正是ArrayList所实现的接口。
     */
    public class DemoInterface {
        
        public static void main(String[] args) {
        
    
            //左边是接口名称，右边是实现类名称，这就是多态的写法
            List<String> list = new ArrayList<>();
    
            List<String> result = addName(list);
            for (int i = 0; i < result.size(); i++) {
        
                System.out.println(result.get(i));
            }
        }
    
        public static List<String> addName(List<String> list){
        
            list.add("迪丽热巴");
            list.add("古力娜扎");
            list.add("玛尔扎哈");
            list.add("撒由那拉");
            return list;
        }
    }