To judge the mouse double button press (with keyboard key combination)

To help you check the API, there are some words you may not pay attention to see:
The button mask returned by Inputevent.getmodifiers () reflects only the button this is changed state f all buttons. (Note:due to overlap in the same values of Alt_mask/button2_mask and meta_mask/button3_mask, this isn't always true for mouse Events involving modifier keys). To get the state of all buttons and modifier keys, use Inputevent.getmodifiersex ().

Inputevent.getmodifiers () only reflects the change state of a single key, and if you want to obtain the state of the key combination, you must use Inputevent.getmodifiersex ().

The following code I have tested, can be judged:
Gtext.addmouselistener (New Mouseadapter ()
{
public void mousepressed (MouseEvent e)
{

if (E.getbutton () ==e.button1)
Glabel.settext ("Button1"); Judge left Key

if (E.getbutton () ==e.button3)
Glabel.settext ("Button3")/Right Key

if (e.getmodifiersex () = = (E.button3_down_mask + e.button1_down_mask))
Glabel.settext ("bt1+bt3!"); To determine the right and left key pressed at the same time

if (e.getmodifiersex () = = (E.shift_down_mask + e.button1_down_mask))
Glabel.settext ("shift+bt1");//shift+ left arrow
//............... Other similarities, modifying constant values can be
}

}
);