Clases de JavaSE 23 como tipos de variables miembro

Capítulo 28 Clases como tipos de variables miembro

public class Weapon {
    
    
	
	private String code;
	
	public Weapon() {
    
    
	}
	
	public Weapon(String code) {
    
    
		this.code = code;
	}
	
	public String getCode() {
    
    
		return code;
	}
	
	public void setCode(String code) {
    
    
		this.code = code;
	}
	
}

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("年龄为" + age + "的" + name + "正在用" + weapon.getCode());
	}
	
	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 Demo {
    
    

	public static void main(String[] args) {
    
    
		Hero hero = new Hero();
		hero.setName("盖伦");
		hero.setAge(20);
		
		Weapon weapon = new Weapon("多兰剑");//创建一个武器对象
		hero.setWeapon(weapon);//为英雄配备武器
		
		hero.attack();//年龄为20的盖伦用多兰剑
	}
}

28.1 Interfaces como tipos de variables miembro

public interface Skill {
    
    
	void use();
}

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.println("我叫" + name + "我使用的技能是" + skill);
	}
	
	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 Demo {
    
    

	public static void main(String[] args) {
    
    
		Hero hero = new Hero();
		hero.setName("ACE");
		
/*		Skill skill = new Skill() {	//方法一
			@Override
			public void use() {
				System.out.println("ka~Ding~ka")
		};
		
		hero.setSkill(skill);
*/
		
		hero.setSkill(new Skill() {
    
    	//方法二
			@Override
			public void use() {
    
    
				System.out.println("ka~ka~ka")
			}
		});
		
		hero.attack();
	}
	
}

28.2 Interfaces como parámetros de método y/o valores de retorno

public class DemoInterface {
    
    
	
	public static void main(String[] args) {
    
    
		//java.util.list正是ArrayList所实现的接口
		//左边是接口名称，右边是实现类名称，这就是多态
		List<String> list = new ArrayList<>();
		
		List<String> result = addNames(list);
		for (int i = 0; i < result.size(); i++) {
    
    
			System.out.println(result.get(i));
		}
	}
	
	public static List<String> addNames(List<String> list) {
    
    
		list.add("IU");
		list.add("Suzy");
		list.add("Yonna");
		list.add("Yuri");
		return list;
	}
	
}