1.類作為成員變量類型

Hero.java

package Demo02;public class Hero {private String name;//英雄的名字private int age;//英雄的姓名private Weapon weapon;//英雄的武器public void attack(){System.out.println(age+"歲的" + name + "拿著" + weapon.getCode());//要用get方法}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;} }

Weapon.java

package Demo02;public class Weapon {private String code;public Weapon(String code) {this.code = code;}public Weapon() {}public String getCode() {return code;}public void setCode(String code) {this.code = code;} }

DemoMain.java

package Demo02;public class DemoMain {public static void main(String[] args) {Hero hero = new Hero();hero.setName("haha");hero.setAge(11);Weapon weapon = new Weapon("hh");hero.setWeapon(weapon);//配備武器hero.attack();//11歲的haha拿著hh} }

2.接口作為成員變量類型

Skill.java

package Demo03;public interface Skill {public abstract void use();//釋放技能的抽象方法 }

Hero.java

package Demo03;public class Hero {private String name;private Skill skill;public void atcion(){System.out.println("名字為" + name + "的英雄,技能為");skill.use();System.out.println("結束技能");}public Hero() {}public Hero(String name, Skill skill) {this.name = name;this.skill = 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;}}

Demo03Main.java

package Demo03;public class Demo03Main {public static void main(String[] args) {Hero hero = new Hero();hero.setName("xx");Skill skill = new Skill(){@Overridepublic void use() {System.out.println("英雄放大招了");}};hero.setSkill(skill);hero.atcion();} }

4.接口作為方法的參數和返回值

DemoInterface.java

package Demo03;import java.util.ArrayList; import java.util.List;public class DemoInterface {public static void main(String[] args) {List<String> arrayList = new ArrayList<>();List<String> list = addName(arrayList);for (int i = 0; i < list.size(); i++) {System.out.println(list.get(i));}}public static List<String> addName(List<String> list) {list.add("xx");list.add("yy");return list;} }

總結

以上是生活随笔為你收集整理的2021-11-09类作为成员变量类型的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。