我为for {{1}中的每个值为JRadioButton ButtonGroup创建了btgrpDiff循环Difficulty }：
enum private enum Difficulty {
EASY("Easy"),
MEDIUM("Medium"),
HARD("Hard"),
EXTRA_HARD("Extra Hard");
public final String name;
private Difficulty(String name) {
this.name = name;
}
}
for (Difficulty diff : Difficulty.values()) {
JRadioButton radDiff = new JRadioButton(diff.name);
radDiff.setActionCommand(diff.name);
btgrpDiff.add(radDiff);
panDiff.add(radDiff, "align 50%, shrink 2, wrap");
}
循环之外的setSelected ButtonGroup如何btgrpDiff？我想在它们全部被选中后直接设置它，或者在我的枚举中为每个难度级别设置一个布尔参数，以确定它们是否在for循环中被设置为选中，但我是不确定哪个最好，或者确切地获得for的{{1}}。
答案 0 :(得分：1)
创建后将按钮放在ArrayList中。
作为类变量你应该
ArrayList<JRadioButton> mylist = new ArrayList<JRadioButton>()
所以在循环内部执行：
mylist.add(new JRadioButton(diff.name));
然后您可以随时使用mylist.get(i)
答案 1 :(得分：1)
或者将它们放在地图中，然后您可以直接获取它们：
Map<Difficulty,JRadioButton> rButtons = new HashMap<Difficulty,JRadioButton>();
for (Difficulty diff : Difficulty.values()) {
JRadioButton radDiff = new JRadioButton(diff.name);
rButtons.put(diff,radDiff);
btgrpDiff.add(radDiff);
...
}