如何在JavaSwing中将arraylist显示为单独的JLabel？

Question

我有一个城市名称的数组列表，我想将它们显示为自下而上的jlabel。我该怎么做

   ArrayList<String> cityNames = new ArrayList<>(columnCount); 

                while(resultSet.next()){
                    int i = 1;
                       while(i <= columnCount) {
                           cityNames.add(resultSet.getString(i++));
                       }            
                }

                //Loop through cityNames as seperate Jlabels
            for(String city : cityNames){
                cityLabel.setText(city);
            }

Answer 1

创建多个JLabel并将它们添加到面板

JPanel panel = [...];
ArrayList<String> cityNames = [...];

for(String city : cityNames)
    panel.add(new JLabel(city));

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如果以后需要处理它们，也可以将它们添加到List

JPanel panel = [...];
ArrayList<String> cityNames = [...];
List<JLabel> cityLabels = new ArrayList<JLabel>();

for(String city : cityNames)
{
    JLabel label = new JLabel(city);
    cityLabels.add(label);
    panel.add(label);
}

---

如果您只想将所有城市名称都放在一个JLabel(can be on multiple lines)

ArrayList<String> cityNames = [...];

String cities = "";
for(String city : cityNames)
    cities += ", " + city; //or use "<br>" for separate lines
cities = cities.substring(2); //remove the first ", "

JLabel cityLabel = new JLabel(cities); //add this to your rendering panel