当鼠标悬停在它上面时如何阻止JButton启用？

Question

I created a frame using NetBeans. The frame has two buttons A and B. Button A is initially disabled. It is to be enabled only when button B is clicked.

public newFrame() {    //newFrame is the name of the frame that has buttons A&B
    initComponents();

    btn_A.disable();
}

    private void btn_BActionPerformed(java.awt.event.ActionEvent evt)
{
    btn_A.enable();
}

The problem is that button A becomes active/enabled when the mouse is moved over it ie inspite of whether button B is clicked or not. How can i fix this?

I want button A to be enabled only after button B is clicked and not as a result of any other event.

Answer 1

使用btn_A.setEnabled(false)代替btn_A.disable()

Answer 2

btn_A.enable() is a deprecated method.
To do this task, you could replace it by btn_A.setEnabled(false); to disable the button and btn_A.setEnabled(true); to enable the button.

Also, one more suggestion is, add statements like the following in your method if you feel something wrong happening:

    System.out.println("Some statement relevant to the method"); 

The main aim of those extra statements being you know when the method was actually executed.

Answer 3

Try the following code:

button. addMouseListener(new MouseAdapter() { 
      public void mouseEntered(MouseEvent me) { 
            button.setEnable(true); 
      } 

      public void mouseExited(MouseEvent me) { 
           button.setEnable(false); 
      } 

    });