package nuc.edu.day01.demo05;

/**
 * @author Administrator
 * 用戶類
 */
public class User {
  private String name;
  private Double money;

  public User() {
  }
  //顯示當前余額
  public void show(){
    System.out.println(name + "當前的余額為：" + money);
  }

  public User(String name, Double money) {
    this.name = name;
    this.money = money;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public Double getMoney() {
    return money;
  }

  public void setMoney(Double money) {
    this.money = money;
  }
}

package nuc.edu.day01.demo05;

import java.util.ArrayList;

/**
 * @author Administrator
 * 群主發(fā)紅包的操作
 */
public class Manager extends User {
  public Manager() {
  }

  public Manager(String name, Double money) {
    super(name, money);
  }

  /**定義發(fā)紅包的方法
   * totalMoney：發(fā)紅包的總金額
   * num：發(fā)紅包的個數(shù)*/
  public ArrayList<Double> send(double totalMoney,int num){
    /**存放紅包的集合*/
    ArrayList<Double> redList = new ArrayList<>();
    /**當前余額*/
    double leftMoney = super.getMoney();
    if (leftMoney < totalMoney){
      System.out.println("抱歉，您的余額不足");
      return redList;
    }
    /**發(fā)完紅包的余額*/
    super.setMoney(leftMoney-totalMoney);
    /**將錢平均存入每個紅包中*/
    double avg = totalMoney / num;
    for (int i = 0; i < num; i++) {
      redList.add(avg);
    }
    return redList;
  }
}

package nuc.edu.day01.demo05;

import java.util.ArrayList;
import java.util.Random;

/**
 * @author Administrator
 * 群內(nèi)成員搶紅包的操作
 */
public class Member extends User {
  public Member() {
  }

  public Member(String name, Double money) {
    super(name, money);
  }

  /**定義收紅包的方法*/
  public void receive(ArrayList<Double> list){
    /**創(chuàng)建隨機紅包對應的索引*/
    int index = new Random().nextInt(list.size());
    /**當前余額*/
    double money = super.getMoney();
    /**根據(jù)索引將自己搶到的紅包刪掉*/
    double delta = list.remove(index);
    /**領(lǐng)完紅包后的余額*/
    super.setMoney(money+delta);
  }
}

package nuc.edu.day01.demo05;

import java.util.ArrayList;

/**
 * @author Administrator
 */
public class Main {
  public static void main(String[] args) {
    Manager manager = new Manager("群主",300.00);
    Member a = new Member("A",0.00);
    Member b = new Member("B",10.00);
    /**顯示當前余額*/
    manager.show();
    a.show();
    b.show();
    System.out.println("============");

    ArrayList<Double> redList = manager.send(52.00,2);
    a.receive(redList);
    b.receive(redList);
    /**顯示搶完紅包后的余額*/
    manager.show();
    a.show();
    b.show();
  }
}