Question

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}}。

Answer 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)

访问它们

Answer 2

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);
...
}

如何在一个ButtonGroup中setSelected，其中所有的JRadioButtons都是在循环中创建的？

2 个答案: