java群主发普通红包。某群有多名成员,群主给成员发普通红包。普通红包的规则: (1)群主的一笔金额,从群主余额中扣除,分成n份,让成员领取随机金额(假设随机金额在0.01与剩余平均值*2之间)。 (2)成员领取红包后,存储到成员的余额中。 请根据上述描述,完成案例中所有类的定义以及指定类之间的继承关系,并完成发红包、领红包的操作。
时间: 2024-02-15 22:02:48 浏览: 67
根据您所描述的规则,可以定义以下类:
1. 群主类(GroupOwner):属性包括群主余额,方法包括发普通红包的方法。
2. 成员类(Member):属性包括成员余额,方法包括领取红包的方法。
3. 普通红包类(CommonRedPacket):属性包括红包金额、红包数量、已领取的红包数量,方法包括计算随机金额、分配红包金额的方法。
继承关系如下:
GroupOwner --> CommonRedPacket
Member --> CommonRedPacket
以下是示例代码:
```java
// 群主类
public class GroupOwner {
private double balance; // 群主余额
public GroupOwner(double balance) {
this.balance = balance;
}
public void sendCommonRedPacket(int num, double amount) {
CommonRedPacket packet = new CommonRedPacket(amount, num);
packet.distribute(); // 分配红包金额
balance -= amount; // 扣除群主余额
}
public double getBalance() {
return balance;
}
}
// 成员类
public class Member {
private double balance; // 成员余额
public Member(double balance) {
this.balance = balance;
}
public void receiveRedPacket(CommonRedPacket packet) {
double amount = packet.getRandomAmount(); // 随机领取金额
balance += amount; // 存储到成员余额中
packet.addAmount(amount); // 更新红包余额
}
public double getBalance() {
return balance;
}
}
// 普通红包类
public class CommonRedPacket {
private double amount; // 红包金额
private int num; // 红包数量
private int count; // 已领取的红包数量
private double[] amounts; // 每个红包的金额
public CommonRedPacket(double amount, int num) {
this.amount = amount;
this.num = num;
this.count = 0;
this.amounts = new double[num];
}
public void distribute() {
double sum = amount;
for (int i = 0; i < num - 1; i++) {
double avg = sum / (num - i);
double money = Math.random() * (avg * 2 - 0.01) + 0.01; // 计算随机金额
amounts[i] = money;
sum -= money;
}
amounts[num - 1] = sum;
}
public double getRandomAmount() {
if (count < num) {
double amount = amounts[count];
count++;
return amount;
} else {
return 0;
}
}
public void addAmount(double amount) {
this.amounts[count - 1] -= amount;
}
}
```
使用示例:
```java
// 初始化群主和成员
GroupOwner owner = new GroupOwner(100.0);
Member member1 = new Member(0);
Member member2 = new Member(0);
// 群主发红包
owner.sendCommonRedPacket(5, 50.0);
// 成员领取红包
member1.receiveRedPacket(ownerPacket);
member2.receiveRedPacket(ownerPacket);
// 输出余额
System.out.println("群主余额:" + owner.getBalance());
System.out.println("成员1余额:" + member1.getBalance());
System.out.println("成员2余额:" + member2.getBalance());
```
阅读全文