Java ActionListener无法正常工作

Question

我正在尝试向JComboBox添加动作侦听器，但出于某种原因，每次单击JComboBox时，我选择的所选项目不是seasonsBox（那个框）.getSelectedItem（）和seasonsBox.getSelectedItem（ ）实际上是框中的第一项。这是我的（相关）代码; （我添加了setupSeasonsBox，因为它可能有问题）

public void setupSeasonsBox(Show currentShow){
seasonsBox.addItem("Choose a season");
seasonsBox.setBounds(0,50,500,20);
seasonsBox.setVisible(true);
panel.add(seasonsBox);
if(currentShow.getSeasons()==null||currentShow.getSeasons().size()==0){
}else if(seasonsBox.getItemCount()<=2){
    Season[] seasons = currentShow.getSeasons().toArray(new Season[currentShow.getSeasons().size()]);
    List<Integer> numberslist = new ArrayList<Integer>();
    for(Season season : seasons){
        numberslist.add(season.getNumber);
    }
    Integer[] numbers = numberslist.toArray(new Integer[numberslist.size()]);
    Arrays.sort(numbers, new Comparator<Integer>(){public int compare(Integer x, Integer y){return x - y;}});

    for(Integer i : numbers){
        seasonsBox.addItem("Season "+i);
    }   
}
//Remove duplications
Set<String> items = new HashSet<String>();
for(int i = 0; i<seasonsBox.getItemCount(); i++){
    items.add(seasonsBox.getItemAt(i));
}
seasonsBox=new JComboBox<String>(items.toArray(new String[items.size()]));
}
public void actionChooseSeason(){
ActionListener ac = new ActionListener(){
    public void actionPerformed(ActionEvent e) {
        System.out.println("PREFORMED");
        System.out.println(seasonsBox.getSelectedItem());
        if(seasonsBox.getSelectedItem()!="Choose a season"&&
           seasonsBox.getSelectedItem()!="No seasons found."){
            Season currentSeason = getSeasonByNumber(currentShowSelected,Integer.parseInt(seasonsBox.getSelectedItem().toString().replaceAll("Season ","")));
            setupEpisodesBox(currentSeason);
            System.out.println(currentSeason==null);
            currentSeasonSelected=currentSeason;
        }else{
            if(episodeBox!=null)if(episodeBox.isVisible())episodeBox.setVisible(false);
            currentSeasonSelected=null;
        }
    }
};
seasonsBox.addActionListener(ac);

}

操作已注册，触发时会调用 ，但问题出在所选项目上。它不会执行操作，因为它始终是相同的项目，并且该项目不会触发我想要触发的操作。