在Java中如何开发简易投票候选人管理系统_投票候选人管理项目实战解析

public class Candidate {
    private String name;
    private int votes;
<pre class='brush:java;toolbar:false;'>public Candidate(String name) {
    this.name = name;
    this.votes = 0;
}

public String getName() {
    return name;
}

public int getVotes() {
    return votes;
}

public void addVote() {
    this.votes++;
}

@Override
public String toString() {
    return "候选人：" + name + " | 得票数：" + votes;
}

import java.util.*;
<p>public class VoteManager {
private List<Candidate> candidates = new ArrayList<>();
private Scanner scanner = new Scanner(System.in);</p><pre class='brush:java;toolbar:false;'>public void start() {
    while (true) {
        showMenu();
        int choice = scanner.nextInt();
        scanner.nextLine(); // 消费换行符

        switch (choice) {
            case 1:
                addCandidate();
                break;
            case 2:
                listCandidates();
                break;
            case 3:
                vote();
                break;
            case 4:
                showResults();
                break;
            case 5:
                System.out.println("感谢使用，再见！");
                return;
            default:
                System.out.println("无效选择，请重新输入");
        }
    }
}

private void showMenu() {
    System.out.println("\n=== 投票候选人管理系统 ===");
    System.out.println("1. 添加候选人");
    System.out.println("2. 查看所有候选人");
    System.out.println("3. 投票");
    System.out.println("4. 查看投票结果");
    System.out.println("5. 退出");
    System.out.print("请选择操作：");
}

private void addCandidate() {
    System.out.print("请输入候选人姓名：");
    String name = scanner.nextLine();
    for (Candidate c : candidates) {
        if (c.getName().equals(name)) {
            System.out.println("该候选人已存在！");
            return;
        }
    }
    candidates.add(new Candidate(name));
    System.out.println("添加成功！");
}

private void listCandidates() {
    if (candidates.isEmpty()) {
        System.out.println("暂无候选人信息");
        return;
    }
    System.out.println("\n当前候选人列表：");
    for (Candidate c : candidates) {
        System.out.println(c);
    }
}

private void vote() {
    if (candidates.isEmpty()) {
        System.out.println("暂无候选人，无法投票");
        return;
    }
    listCandidates();
    System.out.print("请输入要投票的候选人姓名：");
    String name = scanner.nextLine();
    for (Candidate c : candidates) {
        if (c.getName().equals(name)) {
            c.addVote();
            System.out.println("投票成功！感谢您的参与");
            return;
        }
    }
    System.out.println("未找到该候选人，请检查姓名是否正确");
}

private void showResults() {
    if (candidates.isEmpty()) {
        System.out.println("暂无投票数据");
        return;
    }
    // 按票数降序排序
    candidates.sort((a, b) -> b.getVotes() - a.getVotes());
    System.out.println("\n=== 投票结果排行榜 ===");
    for (int i = 0; i < candidates.size(); i++) {
        System.out.println((i+1) + ". " + candidates.get(i));
    }
}

public class Main {
    public static void main(String[] args) {
        new VoteManager().start();
    }
}