Java学习day5-面向对象2

构建标准JavaBean快捷方式

快捷键：alt+insert(+Fn)->构造函数->全选构造带参方法，不选择则空参构造

插件：ptg,安装后右键单击，倒数第三个则为一键构造所有set/get函数

数据类型

基本数据类型：数据值存储在自己的空间中

特点：赋值给其他变量也是赋的真实的值

引用数据类型：数据存储在其他空间中，自己空间中存储的是地址值

特点：赋值给其他变量赋的是地址值

如：

Student s=new Student();//s为引用数据，其存储的是一个结构体的地址

s.name="李明";//结构体内name为基本数据类型，其值存储在自己空间中

小练习-简单版文字游戏

public class Game {
    public  static  void  main(String[] args){
        People p1=new People("小兵1号",100);
        People p2=new People("小兵2号",100);
        while(p1.getBlood()>0&&p2.getBlood()>0){
            p1.attack(p2);
            p2.attack(p1);
        }
    }
}

import java.util.Random;
public class People {
    private String name;
    private  int blood;

    public People() {
    }

    public People(String name, int blood) {
        this.name = name;
        this.blood = blood;
    }

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getBlood() {
        return blood;
    }
    public void setBlood(int blood) {
        this.blood = blood;
    }

    public String toString() {
        return "People{name = " + name + ", blood = " + blood + "}";
    }

    public  void attack(People role){
        Random r=new Random();
        int damage=r.nextInt(25)+1;
        int blood2=role.getBlood()-damage;
        role.setBlood(blood2);
        System.out.printf("%s攻击了%s，造成了%d点伤害。\n",this.getName(),role.getName(),damage);
        if (role.getBlood()<=0) System.out.printf("%s死亡，游戏结束,%s胜利！\n",role.getName(),this.getName());
        else {
            System.out.printf("%s剩余血量为%d\n", role.getName(), role.getBlood());
        }
    }
}

对象数组

和c/c++的结构体数组差不多

public class Good {
     private String name;
     private String kind;//种类
     private int price;//价格
     private int amount;//数量

    public Good() {
    }

    public Good(String name, String kind, int price, int amount) {
        this.name = name;
        this.kind = kind;
        this.price = price;
        this.amount = amount;
    }


    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getKind() {
        return kind;
    }
    public void setKind(String kind) {
        this.kind = kind;
    }
    public int getPrice() {
        return price;
    }
    public void setPrice(int price) {
        this.price = price;
    }
    public int getAmount() {
        return amount;
    }
    public void setAmount(int amount) {
        this.amount = amount;
    }

    public String toString() {
        return "Good{name = " + name + ", kind = " + kind + ", price = " + price + ", amount = " + amount + "}";
    }
}

public class Main {
    public static void main(String[] args) {
        Good[] arr=new Good[3];
        Good g1=new Good("巧克力","食品",15,50);
        Good g2=new Good("笔记本","文具",8,90);
        Good g3=new Good("短裙","衣物",79,20);
        arr[0]=g1;
        arr[1]=g2;
        arr[2]=g3;
        for (int i=0;i<3;i++) System.out.println(arr[i].getPrice());
    }
}

其余对象数组的查找、删除、插入操作与c/c++类似