班级投票系统
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src/chapter3/Example14.java
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src/chapter3/Example14.java
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package chapter3;public class Example14 {
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}
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src/chapter3/demo34/Main.java
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src/chapter3/demo34/Main.java
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package chapter3.demo34;
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/**
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* Main类,程序的入口点
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*/
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public class Main {
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/**
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* 主方法
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* @param args 命令行参数
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*/
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public static void main(String[] args) {
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// 创建VotingSystem对象并开始投票
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VotingSystem votingSystem = new VotingSystem();
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votingSystem.startVoting();
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}
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}
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src/chapter3/demo34/Voter.java
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src/chapter3/demo34/Voter.java
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package chapter3.demo34;
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/**
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* Voter类代表一个投票者
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*/
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public class Voter {
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// 最大投票人数
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private static final int MAX_COUNT = 50;
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// 当前投票人数
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private static int count = 0;
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// 存储所有投票者的数组
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private static Voter[] voters = new Voter[MAX_COUNT];
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// 投票者姓名
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private String name;
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// 投票意见(true表示赞同,false表示反对)
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private boolean opinion;
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/**
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* 构造方法
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* @param name 投票者姓名
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*/
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public Voter(String name) {
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this.name = name;
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}
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/**
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* 投票方法
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* @param opinion 投票意见
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*/
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public void vote(boolean opinion) {
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// 检查是否达到最大投票人数
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if (count >= MAX_COUNT) {
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System.out.println("投票已结束,已达到最大投票数。");
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return;
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}
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// 检查是否重复投票
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if (hasVoted(this.name)) {
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System.out.println(name + ",请勿重复投票。");
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return;
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}
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// 记录投票意见
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this.opinion = opinion;
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voters[count] = this;
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count++;
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System.out.println(name + ",感谢您的投票。");
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}
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/**
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* 检查指定姓名的人是否已经投票
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* @param name 要检查的姓名
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* @return 如果已投票返回true,否则返回false
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*/
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private static boolean hasVoted(String name) {
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for (int i = 0; i < count; i++) {
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if (voters[i].name.equals(name)) {
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return true;
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}
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}
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return false;
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}
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/**
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* 打印投票结果
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*/
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public static void printResults() {
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System.out.println("===========投票结果===========");
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System.out.println("总投票数:" + count);
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int agreeCount = 0;
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for (int i = 0; i < count; i++) {
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System.out.println(voters[i].name + " 的意见:" + (voters[i].opinion ? "赞同" : "反对"));
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if (voters[i].opinion) {
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agreeCount++;
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}
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}
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System.out.println("赞同人数:" + agreeCount);
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System.out.println("反对人数:" + (count - agreeCount));
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}
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/**
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* 获取投票者姓名
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* @return 投票者姓名
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*/
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public String getName() {
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return name;
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}
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// 静态初始化块,在类加载时执行
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static {
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System.out.println("Voter类已加载,准备开始投票。");
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}
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}
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src/chapter3/demo34/VotingSystem.java
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src/chapter3/demo34/VotingSystem.java
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package chapter3.demo34;
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import java.util.Scanner;
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/**
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* VotingSystem类管理整个投票过程
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*/
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public class VotingSystem {
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// 用于接收用户输入
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private Scanner scanner;
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/**
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* 构造方法
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*/
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public VotingSystem() {
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this.scanner = new Scanner(System.in);
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}
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/**
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* 开始投票过程
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*/
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public void startVoting() {
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while (true) {
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// 输入投票者姓名
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System.out.println("请输入您的姓名:");
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String name = scanner.nextLine();
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Voter voter = new Voter(name);
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// 输入投票意见
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System.out.println("请投票(Y表示赞同,N表示反对):");
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String opinion = scanner.nextLine();
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voter.vote(opinion.equalsIgnoreCase("Y"));
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// 询问是否继续投票
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System.out.println("是否继续投票?(Y/N)");
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if (scanner.nextLine().equalsIgnoreCase("N")) {
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break;
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}
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}
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// 打印投票结果
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Voter.printResults();
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}
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}
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