Question

java中怎么知道单选框的选中状态

Answer 1

使用JRadioButton定义选择按钮，如果要实现单选，需要把按钮添加至ButtonGroup，如下：
ButtonGroup
buttonGroup2
=
new
ButtonGroup();
JRadioButton
select_ID
=
new
JRadioButton();
JRadioButton
select_Name
=
new
JRadioButton();
JRadioButton
select_Book
=
new
JRadioButton();
JRadioButton
select_All
=
new
JRadioButton();
初始化时执行：
buttonGroup2.add(select_ID);
buttonGroup2.add(select_Book);
buttonGroup2.add(select_Name);
buttonGroup2.add(select_All);
判断是否选中：
select_Name.isSelected()
选中时返回true，否则false