为什么我的程序只打印出数组的最后一个对象值？

Question

候选人class：

public class Candidate 
{
    private static String name;
    private static int numVotes;

    Candidate(String name, int numVotes)
    {
        Candidate.name = name;
        Candidate.numVotes = numVotes;
    }

    public String toString()
    {
        return name + " recieved " + numVotes + " votes.";
    }

    public static int getVotes()
    {
         return numVotes;
    }

    public static void setVotes(int inputVotes)
    {
         numVotes = inputVotes;
    }

    public static String getName()
    {
        return name;
    }

    public static void setName(String inputName)
    {
        name = inputName;
    }
}

应试者class:

public class TestCandidate 
{
    public static Candidate[] election = new Candidate[5];

    public static void addCandidates(Candidate[] election)
    {
        election[0] = new Candidate("John Smith", 5000);
        election[1] = new Candidate("Mary Miller", 4000);
        election[2] = new Candidate("Michael Duffy", 6000);
        election[3] = new Candidate("Tim Robinson", 2500);
        election[4] = new Candidate("Joe Ashton", 1800);
    }


    public static int getTotal(Candidate[] election)
    {
        int total = 0;

        for (Candidate i : election)
        {
            total += Candidate.getVotes();
        }

        return total;
    }

    public static void printResults(Candidate[] election)
    {
        System.out.printf("%s%12s%25s", "Candidate", "Votes", "Percentage of Votes\n");

        for (Candidate i: election)
        {
            System.out.printf("\n%s%10s%10s", Candidate.getName(), Candidate.getVotes(), ((double)Candidate.getVotes()/getTotal(election) * 100));
        }

        System.out.println("\n\nTotal Number of Votes: " + getTotal(election));
    } 

    public static void main (String args[])
    {
        addCandidates(election);
        printResults(election);
    }
}

每当我运行 TestCandidate class，它输出这个：

Candidate       Votes     Percentage of Votes

Joe Ashton      1800      20.0
Joe Ashton      1800      20.0
Joe Ashton      1800      20.0
Joe Ashton      1800      20.0
Joe Ashton      1800      20.0

Total Number of Votes: 9000

程序的重点是输出所有候选人并根据每个人计算平均值。我相信这是我的 for-each 循环中的一个问题。如有任何帮助，我们将不胜感激。

Answer 1

private static String name;
private static int numVotes;

静态成员对 class 的所有实例都有一个值。删除 static 关键字以使不同的实例具有不同的值。

Answer 2

如果你这样做：

private static String name;
private static int numVotes;

您创建的每个新 Candidate 对象将覆盖所有其他对象的字段 name 和 numVotes，因为这些字段不是对象字段是 class 字段。 .

您需要删除这些字段的静态关键字才能工作：

示例：

public class Candidate 
{
    private String name;
    private int numVotes;

    Candidate(String name, int numVotes)
    {
        Candidate.name = name;
        Candidate.numVotes = numVotes;
    }
    .... .... ETC ETC

为什么我的程序只打印出数组的最后一个对象值？

Why is my program printing out only the last object value of the array?

java

arrays

traversal

示例：