首先,我为糟糕的头衔道歉。我很难描述这个错误。我有一个GUI应用程序,我正在使用以下类:Click here to see my classes.我遇到了一个非常奇怪的问题,可以在GUI中访问类设置但不能访问彩票。在GUI中,我可以通过我在GUI中创建的Settings对象调用方法,并且它可以工作。但是,当我从彩票中呼叫它时,返回任何内容或0。 我已在Lottery中创建了一个Settings对象。我在设置中的值之后单击按钮时运行以下代码。
public void initialize(){
teams = settings.getTeams();
pick = settings.getNumberOfTeams();
//Returns nothing ^
//teams and pick is a local varible
}
上面的变量什么都没有,即使我设置了它们。我知道它们已经被设置了,因为如果我从Settings类中调用了getTeams(),它将返回下面的正确值。
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,当从彩票公司打电话时,它什么都没有。但是,当我从GUI调用Settings时,确实正确返回但没有任何其他类。注意:每个类都创建一个单独的Settings对象。 另一个有趣的事情是我的IDE说,该方法可以是私有的,即使我明确地从上面的另一个类中调用它。在此处查看:It's hard to see but Public is highlighted saying it can be private
我通常擅长发现错误,但是这个错误让我困扰了大约一个星期。什么都有帮助。如果有帮助,我还会将完整的彩票和设置课程放在下面。请注意:“设置”中的局部变量已设置,可以在“设置”中访问。
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:
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;
}
答案 0 :(得分:1)
&#34;注意:每个类,都会创建一个单独的设置对象。&#34; 这是导致问题的原因。
您有多个Setting类的实例。这意味着您无法访问在其他实例上设置的字段。
当你写作
Setting settings = new Settings();
在彩票类中,您正在创建设置类的新实例。因此没有填充任何字段。
要解决此问题,您需要拥有一个集中的“设置”对象。只在连接所有内容(GUI?)和从该类写入/读取的类中创建一个Settings实例。您可以将设置的一个实例从GUI传递到Lottery类,它将保留您指定的所有字段。
此外,似乎您的Settings对象缺少构造函数,而您在Lottery.initialize()方法中的内容应该在(当前为空)构造函数中。您应该至少使用一般构造函数初始化您的设置。