如何判断是否已为if语句执行了动作事件

Question

I need to know if a specific action event has been performed because in the if statement I will have another action be performed, but it depends on which action event(s) have already been performed.

xButton9.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent x9) {
                xButton9.setVisible(false);
                oButton9.setVisible(false);
                nine.repaint();
                nine.add(xlabel);
        }
} );

oButton9.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent o9) {
                xButton9.setVisible(false);
                oButton9.setVisible(false);
                nine.repaint();
                nine.add(olabel);
        }      
} );  

if (ActionEvent 09 has been performed) {
    do this stuff
}

Answer 1

You need to handle that inside of your actionPerformed() method, while you still have a reference to o9 .

oButton9.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent o9) {
    xButton9.setVisible(false);
    oButton9.setVisible(false);
    nine.repaint();
    nine.add(olabel);

    // whatever else happens when oButton9 is clicked
    }      
} );