首先,我为这个不好的头衔表示歉意。我很难描述这个错误。我有一个使用以下类制作的GUI应用程序:Click here to see my classes.我遇到了一个非常奇怪的问题,其中可以在GUI中访问类设置,但不能在Lottery中访问。在GUI中,我可以通过在GUI中创建的Settings对象调用方法,并且该方法可以正常工作。但是,当我从彩票中致电给他们时,则不返回任何内容或返回0。
我已经在彩票中创建了一个设置对象。在设置“设置”中的值后单击按钮时,我在下面运行此代码。

public void initialize(){
    teams = settings.getTeams();
    pick = settings.getNumberOfTeams();
    //Returns nothing ^
    //teams and pick is a local varible
}


即使我设置了上述变量,它们也不算什么。而且我知道它们已经设置好了,因为如果我从Settings类中调用getTeams(),它将在下面返回正确的值。

public void addTeam(String name, String wins, String losses){
    teams.add(new Team(name, wins, losses));
    System.out.println(teams.size() - 1 + " " + teams.get(teams.size() -   1));
    System.out.println("Number of teams (SETTINGS): " + getNumberOfTeams());
}


然而,当从彩票中召集时,它什么也没有保留。但是,当我从GUI调用“设置”时,确实会正确返回,但不会返回任何其他类。注意:每个类都会创建一个单独的Settings对象。
另一个有趣的事情是我的IDE表示该方法可以是私有的,即使我从上面的另一个类中清楚地调用了该方法。在这里看到:It's hard to see but Public is highlighted saying it can be private

我通常善于发现错误,但是这个错误使我难堪了大约一个星期。一切都会有帮助的。如果有帮助,我还将在下面放置完整的彩票和设置类。请注意:“设置”中的局部变量已设置,可以在“设置”本身中进行访问。

彩票类:

public class Lottery {
Settings settings = new Settings();

private Random rand = new Random();
private int randNum;
private int pick;
private ArrayList<Team> draftOrder = new ArrayList<Team>(0);
private ArrayList<Team> teams = new ArrayList<Team>(0);
private boolean lotteryDone;

public Lottery(){}

public void initialize(){
    teams = settings.getTeams();
    System.out.println("Lottery team size: " + teams.size());
    pick = settings.getNumberOfTeams();
    System.out.println("Number of Teams (From lottery): " + pick);
    System.out.println("Number of teams (LOTTO): " + pick);
    System.out.println("Test..." + settings.getDraftRounds());
    teams.add(settings.getTeam(1));
    System.out.println("Other method test: " + teams.get(0));
    }

public void setDraftOrder(){
    while (teams.size() > 0){
        randNum = rand.nextInt(teams.size() - 1);
        System.out.println(randNum);
        draftOrder.add(teams.remove(randNum));
        System.out.println(draftOrder.get(0));
    }
}

public void getNextPick(){
     if (pick > 0){
     randNum = rand.nextInt(teams.size() - 1);
     draftOrder.add(pick, teams.remove(randNum));
     pick -= 1;
     }
}

public int getPickNumber(){
    return pick;
}

public Team getCurrentPick(int i){
    return draftOrder.get(i);
}

public ArrayList<Team> getDraftOrder(){
    return draftOrder;
}

public boolean lotteryDone(){
    if (lotteryDone){
        return true;
    }else{
        return false;
    }
}


设置类别:

public class Settings {
private ArrayList<Team> teams = new ArrayList<Team>(0);
private Boolean skipLottery;
private Boolean autoSelectPick;
private int autoSelectPickTimer;
private int totalMoney;
private int yellowOverlay;
private int draftRounds;
private int draftPickTimer;
private int draftTickTimer;
private int currentRound;
private int currentPick;
private boolean lotteryInitialized;
private boolean draftInitialized;
private boolean auctionInitialized;

public void addTeam(String name, String wins, String losses){
    teams.add(new Team(name, wins, losses));
    System.out.println(teams.size() - 1 + " " + teams.get(teams.size() - 1));
    System.out.println("Number of teams (SETTINGS): " + getNumberOfTeams());
}

public boolean settingsDone(){
    if (teams.size() != 0 && totalMoney != 0 && yellowOverlay != 0 && draftRounds != 0 && draftPickTimer != 0 && draftTickTimer != 0){
        return true;
    }else{
        return false;
    }
}

public void clearSettings(){
    teams.clear();
    skipLottery = false;
    autoSelectPick = false;
    autoSelectPickTimer = 0;
    totalMoney = 0;
    yellowOverlay = 0;
    draftRounds = 0;
    draftPickTimer = 0;
    draftTickTimer = 0;
    currentRound = 0;
    currentPick = 0;
    lotteryInitialized = false;
    draftInitialized = false;
    auctionInitialized = false;
}

public void setSkipLottery(boolean i){
    skipLottery = i;
}

public boolean getSkipLottery(){
    return skipLottery;
}

public void setAutoSelectPick(boolean i){
    autoSelectPick = i;
}

public boolean getAutoSelectPick(){
    return autoSelectPick;
}

public void setAutoSelectPickTimer(int i){
    autoSelectPickTimer = i;
}

public int getAutoSelectPickTimer(){
    return autoSelectPickTimer;
}

public void setTotalMoney(int i){
    totalMoney = i;
}

public int getTotalMoney(){
    return totalMoney;
}

public void setYellowOverlay(int i){
    yellowOverlay = i;
}

public int getYellowOverlay(){
    return yellowOverlay;
}

public void setDraftRounds(int i){
    draftRounds = i;
}

public int getDraftRounds(){
    return draftRounds;
}

public void setDraftPickTimer(int i){
    draftPickTimer = i;
}

public void setDraftTickTimer(int i){
    draftTickTimer = i;
}

public ArrayList<Team> getTeams(){
    return teams;
}

public Team getTeam(int index){
    return teams.get(index);
}

public int getNumberOfTeams(){
    return teams.size();
}

public int getDraftPickTimer(){
    return draftPickTimer;
}

public int getDraftTickTimer(){
    return draftTickTimer;
}

public void setLotteryInitialized(boolean i){
    lotteryInitialized = i;
}

public boolean getLotteryInitialized(){
    return lotteryInitialized;
}

public void setDraftInitialized(boolean i){
    draftInitialized = i;
}

public boolean getDraftInitialized(){
    return draftInitialized;
}

public void setAuctionInitialized(boolean i){
    auctionInitialized = i;
}

public boolean getAuctionInitialized(){
    return auctionInitialized;
}

最佳答案

“注意:每个类都会创建一个单独的Settings对象。”
这是造成您问题的原因。

您有Setting类的多个实例。这意味着您无法访问在其他实例上设置的字段。

当你写
Setting settings = new Settings();
在“彩票”类中,您正在创建设置类的新实例。因此,没有任何字段被填充。

要解决此问题,您需要一个集中的Settings对象。在连接所有内容的类(GUI?)中仅创建一个Settings实例,并从该类中进行写入/读取。您可以将该设置的一个实例从GUI传递给Lottery类,它将保留所有分配的字段。

另外,似乎您的Settings对象缺少构造函数,并且Lottery.initialize()方法中的内容应该位于(当前为空)构造函数中。您应该至少使用通用构造函数初始化设置。

09-30 18:15
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