類作爲成員變量類型

//遊戲中英雄的角色類
public class Hero {
    private String name; //英雄名字

}

其中String是一個類 作爲變量類型。點進去String 是JDK中寫的String類

 

示例：把Weapon類當作變量類型 來用

//英雄武器類
public class Weapon {
    private String code; //武器代號

    public Weapon() {
    }

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

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }
}

 

//遊戲中英雄的角色類
public class Hero {
    private String name; //英雄名字
    private int age; //英雄年齡
    private Weapon weapon; //武器類做變量類型  英雄的武器

    //定義一個攻擊方法
    public void attack() {
        System.out.println("年齡是" + age + "歲的" + name + "拿着" + weapon.getCode() + "開始攻擊！");
    }

    public Hero() {
    }

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

    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 demoTest {
    public static void main(String[] args) {

        Hero hero = new Hero();
        hero.setName("花木蘭");
        hero.setAge(18);


      Weapon weapon = new Weapon("水晶獵龍劍");
//
//        Weapon weapon = new Weapon();
//        weapon.setCode("水晶獵龍劍");

        hero.setWeapon(weapon);
         hero.attack();
    }
}