了解Netbeans GUI生成的代码中的按钮/鼠标侦听器

Question

can any tell me what this part of code is doing?

 jButton1.addMouseListener(new java.awt.event.MouseAdapter() 
                           {
                 public void mouseClicked(java.awt.event.MouseEvent evt) 
                                 {
                     jButton1MouseClicked(evt);
                 }
                   });

why are there methods in the parameter for the method addMouseListener? can some one explain in details? im using netbeans and this is code generated.

Answer 1

It's an anonymous MouseAdapter, meaning it calls a new class instance without a variable/assignment. The code itself is calling a new custom event handling method jButton1MouseClicked() , which is what netbeans generates for you so that you can add in your own handling for the code.

Answer 2

Yes, don't add a mouse listener to a button. Well, I use this method to get the position of X and Y mouse click in my GUI using NetBeans.

Right-click the swing container: Choose Events: choose Mouse: choose MouseClicked. Add the following piece of code; (of course my text fields have the variable names tfMouseX and tfMouseY).

tfMouseX.setText(evt.getX() + "");
tfMouseY.setText(evt.getY() + "");