选择完成后不触发Java切换按钮事件，但将鼠标悬停时触发

Question

I have a toggle button and I set its state as follows

 public void setSizeFeet(boolean enabled) {
        this.size_tb.setSelected(enabled);

   } 

I have listener

size_tb.addChangeListener(new javax.swing.event.ChangeListener() {
        public void stateChanged(javax.swing.event.ChangeEvent evt) {
            size_tbStateChanged(evt);
        }
    });
private void size_tbStateChanged(javax.swing.event.ChangeEvent evt) {                                     
     if (size_tb.isSelected()){
            size_tb.setText("Feet");
        } else {
            size_tb.setText("Meters");
        }
}    

The problem that when I set the state calling the first method. Nothing happens. However, by just hovering the mouse over the button then it updates to show the correct text. I put a break a point and I noticed the event just fires when I hover the mouse over the button. Shouldn't it when the selection is set or when it is mouse click not hover)

Thanks

Answer 1

Use ActionListener:

new JToggleButton().addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
        JToggleButton tBtn = (JToggleButton)e.getSource();
        if (tBtn.isSelected()) {
           System.out.println("button selected");
        } else {
           System.out.println("button not selected");
        }        
  }
});

Alternatively you can use the ItemListener:

 ItemListener itemListener = new ItemListener() {
  public void itemStateChanged(ItemEvent itemEvent) {
    int state = itemEvent.getStateChange();
    if (state == ItemEvent.SELECTED) {
      System.out.println("Selected");
    } else {
      System.out.println("Deselected");
    }
  }
};