jbutton.setEnabled（false）不禁用按钮输入

Question

I have the following two classes:

#1

public class LobbyView extends JPanel
{       

    private final JButton sendGameRequestButton = new JButton();

    public JButton getSendGameRequestButton()
    {
        return sendGameRequestButton;
    }

    LobbyView()
    {
        sendGameRequestButton.setPreferredSize(new Dimension(15, 20));
        sendGameRequestButton.setText("Send game request");
        sendGameRequestButton.addMouseListener(new LobbyListener(this));
        sendGameRequestButton.setEnabled(false);
    }
}

#2

public class LobbyListener implements MouseListener
{
    LobbyView lobbyView;

public LobbyListener(LobbyView sentLobbyView)
{
    lobbyView = sentLobbyView;
}

@Override
public void mouseClicked(MouseEvent e)
{
    if (e.getButton() == 1)
    {      
        if (e.getSource() == lobbyView.getSendGameRequestButton())
        {
            System.out.println("You pushed the disabled button");
        }
    }
}

Even though I disabled the JButton in the LobbyView constructor, I can still click it and get the message " You pushed the disabled button ".

Does component.setEnabled(false) actually DISABLE a component, or just gray it out to make it LOOK disabled?

Answer 1

Even though I disabled the JButton in the LobbyView constructor, I can still click it

That is correct. You should NOT be using a MouseListner. The MouseListener works independent of the state of the button.

Instead you should be using an ActionListener . Read the section from the Swing tutorial on How to Use Buttons for more information. Or there is also a section on How to Write an Action Listener .