java - 我的投票系统已经很好但是

Question

我是java初学者，我的投票系统有这些代码:

public void Result_Election(){
        int vote1=Vote_President();
        String pres1="Theo";
        String pres2="William";
        String pres3="Maxon";
        String pres4="Douglas";
        int n1=0, n2=0, n3=0, n4=0;

        try{
            PrintWriter i=new PrintWriter(new FileWriter("voting_score.txt", true));
            if (vote1==1){
                int[] addVotes = {1};
                for (int add : addVotes){
                    result[add-1]+=1;
                    n1=result[add-1];
                }
                i.println(pres1+" "+n1);
            }
            else if (vote1==2){
                int[] addVotes = {2};
                for (int add : addVotes){
                    result[add-1]+=1;
                    n2=result[add-1];
                }
                i.println(pres2+" "+n2);
            }
            else if (vote1==3){
                int[] addVotes = {3};
                for (int add : addVotes){
                    result[add-1]+=1;
                    n3=result[add-1];
                }
                i.println(pres3+" "+n3);
            }
            else if (vote1==4){
                int[] addVotes = {4};
                for (int add : addVotes){
                    result[add-1]+=1;
                    n4=result[add-1];
                }
                i.println(pres4+" "+n4);
            }
            i.close();
        }catch (Exception e){
        }
    }

我的问题是输出。每次我为一位候选人添加选票时，它都会添加另一个名字及其增加的选票。但我想要的只是每个候选人的一个名字，每次我为一名候选人添加选票时，它不会添加另一个名字。只是投票数。请帮忙

Answer 1

为了避免所有这些变量和 if-else block ，我们可以简单地做一些类似的事情 -

Map<String, Integer> candidates = new HashMap<String, Integer>();
candidates.put("Theo", 0);
candidates.put("William", 0);
candidates.put("Maxon", 0);
candidates.put("Douglas", 0);

switch (vote1) 
{
    case 1:
        candidates.put("Theo", candidates.get("Theo")+1);
    break;
    case 2:
        candidates.put("William", candidates.get("William")+1);
    break;
    case 3:
        candidates.put("Maxon", candidates.get("Maxon")+1);
    break;
    case 4:
        candidates.put("Douglas", candidates.get("Douglas")+1);
    break;
}

它将更容易理解和调试。这只是一个例子。您可以按照您想要的方式使用它。

我没有看到“int[] addVotes = {1};”有任何用途并迭代它，因为这总是只包含一个值？你来这里的目的是什么？另外你是如何初始化“结果”的？

[更新]按照自己的方式去做并减少不必要的细节:

public void Result_Election(){

    int vote1 = Vote_President();
    String[] candidateArray = {"Theo", "William", "Maxon", "Douglas"};
    String fileAbsolutePath = "C:/voting_score.txt";

    try
    {
        int[] result = getStorredResult(fileAbsolutePath, candidateArray);
        PrintWriter pw = new PrintWriter(new FileWriter(fileAbsolutePath));
        result[vote1-1] = result[vote1-1]+1;

        for (int i = 0; i < candidateArray.length; i++) {
            pw.println(candidateArray[i]+" "+result[i]);
        }

        pw.flush();
        pw.close();

    }
    catch (Exception e)
    {
        e.printStackTrace(); // better write in log
    }
}

private int[] getStorredResult(String fileName, String[] candidateArray) throws NumberFormatException, IOException {

    String currentLine = null;
    int[] result = new int[candidateArray.length];
    File file = new File(fileName);

    if(file.exists()) {  
        BufferedReader br = new BufferedReader(new FileReader(file));
        while((currentLine = br.readLine()) != null) {
            for (int i = 0; i < candidateArray.length; i++) {
                if(currentLine.startsWith(candidateArray[i])) {
                    result[i] = Integer.parseInt(currentLine.split(" ")[1]);
                    break;
                }
            }
        }
        br.close();
    }

    return result;
}