如何识别在当前选择的单选按钮之前选择了哪个单选按钮？

Question

I have two radio buttons, both added to a ButtonGroup . I have added an ActionListener for both. Suppose that at present the first radio button is selected, then again if I click on the same button then again actionPerformed() will be called. It doesn't look good. I want to prevent the call to actionPerformed() if that radio button is already selected.

One possible way could be to store current selected radio button state in a variable, but I want to know the java internal method for this.

Is there any method to do this?

Answer 1

if(radioButton.isSelected()) this will tell you if its selected. if it's selected you don't perform action. If it's not selected perform the action.