MouseInfo provides methods for getting information about the mouse, such as mouse pointer location and the number of mouse buttons.
package org.kodejava.example.awt;
import java.awt.*;
public class MouseNumberOfButtons {
public static void main(String[] args) {
//
// Get the number of buttons on the mouse. On systems without a
// mouse, returns -1. HeadlessException if
// GraphicsEnvironment.isHeadless() returns true
//
int numberOfButtons = MouseInfo.getNumberOfButtons();
System.out.println("Mouse Number Of Buttons = " + numberOfButtons);
}
}