Java实现发红包功能 - 自学编程网

Java发红包案例，供大家参考，具体内容如下

首先我们需要分析这个代码的架构是什么，需要什么类组成等。
我们需要建立4个类，这4个类分别是用户类、群主类、成员类，运行类；
因为群主类和成员类都有共同的特点--------拥有名字和余额，所以需要用户类去存储名字与余额

第一步：我们需要建立一个用户类，里面存储的是名字和余额

package Java.RedPacketCode;

public class UserClass {
  private String name;
  private int balance;

  public UserClass(String name, int balance) {
    this.name = name;
    this.balance = balance;
  }

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

  public String getName() {
    return name;
  }

  public void setBalance(int balance) {
    this.balance = balance;
  }

  public int getBalance() {
    return balance;
  }

  public void show() {
    System.out.println("Name:" + name + "****" + "RMB:" + balance);
  }
}

第二步：我们需要一个群主类去继承用户类

package Java.RedPacketCode;

import java.util.ArrayList;

public class GroupMainClass extends UserClass {

  public GroupMainClass(String name, int balance) {
    super(name, balance);
  }

  public ArrayList<Integer> handOutRedEnvelopes(int amountRequired, int count) {
    int existingAmount = super.getBalance();
    if (existingAmount < amountRequired) {
      System.out.println("Your balance is insufficient!");
    }
    int money=existingAmount-amountRequired;
    super.setBalance(money);

    System.out.println(super.getName()+" has"+money+" yuan left");

    int avg = amountRequired / count;
    int remainder = amountRequired % count;
    int decimal = avg + remainder;

    ArrayList<Integer> list = new ArrayList<>();
    for (int i = 0; i < count - 1; i++) {
      list.add(avg);
    }
    list.add(decimal);
    return list;
  }
}

第三步：我们需要建立一个成员类去继承用户类

package Java.RedPacketCode;

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

public class MemberClass extends UserClass {

  public MemberClass(String name, int balance) {
    super(name, balance);
  }

  public void redEnvelopes(ArrayList<Integer> list) {
    Random r = new Random();
    int index = r.nextInt(list.size());
    int money = list.remove(index);
    int existingAmount = super.getBalance();
    int totalAmount = money + existingAmount;
    super.setBalance(totalAmount);
  }
}

第四步：我们需要建立一个运行类，用来运行代码

package Java.RedPacketCode;

import java.util.ArrayList;
import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    GroupMainClass gmc = new GroupMainClass("Groupleader", 200);
    gmc.show();
    MemberClass mc1 = new MemberClass("Tom", 0);
    MemberClass mc2 = new MemberClass("Jack", 0);
    MemberClass mc3 = new MemberClass("Jenny", 0);

    UserClass arrays[] = {mc1, mc2, mc3};
    for (int i = 0; i < arrays.length; i++) {
      arrays[i].show();
    }

    System.out.println("==================");
    Scanner scanner = new Scanner(System.in);
    System.out.println("How much would you like to send");
    int money = scanner.nextInt();
    System.out.println("How many red packets would you like to send");
    int count = scanner.nextInt();
    ArrayList<Integer> list = gmc.handOutRedEnvelopes(money, count);
    mc1.redEnvelopes(list);
    mc2.redEnvelopes(list);
    mc3.redEnvelopes(list);
    for (int i = 0; i < arrays.length; i++) {
      arrays[i].show();
    }

  }
}

希望大佬们多多指教。

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