Java AWT |鼠标信息和指针信息

MouseInfo 和 PointerInfo 是Java AWT 的一部分。 MouseInfo 提供有关指针位置和鼠标按钮数量的信息。 PointerInfo 提供信息返回有关指针位置和图形设备的信息。

MouseInfo 的方法

Method	Explanation
getNumberOfButtons()	Returns the number of buttons on the mouse.
getPointerInfo()	Returns a PointerInfo object that represents the current location and graphics device of the pointer.

PointerInfo 的方法

Method	Explanation
getDevice()	Returns the graphics device on which mouse was present when the object was created .
getLocation()	Returns a point object that gives the location of the mouse pointer.

• 查找鼠标上按钮数量的示例程序

  // Java Program to find the number of
  // buttons on the mouse
  import java.awt.*;
  import javax.swing.*;
    
  class numberofbuttons {
    
      // Main Method
      public static void main(String args[])
      {
          int numberofbuttons;
    
          // number of buttons in the mouse
          numberofbuttons = MouseInfo.getNumberOfButtons();
    
          // print the number of buttons
          System.out.println("Number of buttons on the mouse =" 
                                             + numberofbuttons);
      }
  }
  

  输出：

  Number of buttons on the mouse = 5
  

• 显示鼠标位置的示例程序

  // Java Program to show the
  // position of mouse
  import java.awt.*;
  import java.awt.event.*;
  import javax.swing.*;
    
  class mouse extends JFrame {
    
      boolean b;
    
      // label
      JLabel l, l1;
    
      // Main Method
      public static void main(String args[])
      {
    
          // create object
          mouse m = new mouse();
      }
    
      // default constructor
      mouse()
      {
          super("mouse");
    
          // create labels
          l = new JLabel("");
          l1 = new JLabel("");
    
          // create a panel
          JPanel p = new JPanel();
    
          // add labels to panel
          p.add(l);
          p.add(l1);
    
          add(p);
          show();
          setSize(300, 300);
    
          b = true;
          execute();
      }
    
      public void execute()
      {
          while (b) {
              // get the pointer info object from the mouseInfo
              PointerInfo pi = MouseInfo.getPointerInfo();
    
              // get the location of mouse
              Point p = pi.getLocation();
    
              // set the text of labels
              l.setText("x position =" + p.getX());
              l1.setText("y position =" + p.getY());
          }
      }
  }
  

  输出：
  

参考：

• https://docs.oracle.com/javase/7/docs/api/java Java
• https://docs.oracle.com/javase/7/docs/api/java Java