Java源码-屏幕分辨率测试程序

Java How To Program第12章-GUI控件（上篇）中的一个示例，演示了鼠标事件的监控，包括：

1. 单击（click-按下某个鼠标键（左/中/右键）后松开）

2. 移动（move-不按下任何鼠标键的同时，移动鼠标）

3. 拖（drag-按下左/中/右键后不松开，并移动鼠标）

4. 放（release-拖操作之后，松开左/中/右键）。

程序会监控各种鼠标操作发生的位置，在移动操作中，将鼠标移动到屏幕最右下角，可看到X坐标和Y坐标同时达到最大值（1919,982）。

由于JFrame窗口最大化后并没有遮住Windows任务栏，任务栏的高度并没有加入到Y坐标，由此推出屏幕分辩率为1920*1080P，高清屏，嘿嘿。

代码如下：

//Fig. 12.28: MouseTrackerFrame.java//Mouse event handling.import java.awt.Color;import java.awt.BorderLayout;import java.awt.event.MouseListener;import java.awt.event.MouseMotionListener;import java.awt.event.MouseEvent;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class MouseTrackerFrame extends JFrame{private final JPanel mousePanel; // panel in which mouse events occurprivate final JLabel statusBar; // displays event information// MouseTrackerFrame constructor sets up GUI and // registers mouse event handlerspublic MouseTrackerFrame(){   super("Demonstrating Mouse Events");   mousePanel = new JPanel();    mousePanel.setBackground(Color.WHITE);    add(mousePanel, BorderLayout.CENTER); // add panel to JFrame   statusBar = new JLabel("Mouse outside JPanel");    add(statusBar, BorderLayout.SOUTH); // add label to JFrame   // create and register listener for mouse and mouse motion events   MouseHandler handler = new MouseHandler();    mousePanel.addMouseListener(handler);    mousePanel.addMouseMotionListener(handler); } private class MouseHandler implements MouseListener,    MouseMotionListener {   // MouseListener event handlers   // handle event when mouse released immediately after press   @Override   public void mouseClicked(MouseEvent event)   {      statusBar.setText(String.format("Clicked at [%d, %d]",          event.getX(), event.getY()));   }    // handle event when mouse pressed   @Override   public void mousePressed(MouseEvent event)   {      statusBar.setText(String.format("Pressed at [%d, %d]",          event.getX(), event.getY()));   }   // handle event when mouse released    @Override   public void mouseReleased(MouseEvent event)   {      statusBar.setText(String.format("Released at [%d, %d]",          event.getX(), event.getY()));   }   // handle event when mouse enters area   @Override   public void mouseEntered(MouseEvent event)   {      statusBar.setText(String.format("Mouse entered at [%d, %d]",          event.getX(), event.getY()));      mousePanel.setBackground(Color.GREEN);   }   // handle event when mouse exits area   @Override   public void mouseExited(MouseEvent event)   {      statusBar.setText("Mouse outside JPanel");      mousePanel.setBackground(Color.WHITE);   }   // MouseMotionListener event handlers   // handle event when user drags mouse with button pressed   @Override   public void mouseDragged(MouseEvent event)   {      statusBar.setText(String.format("Dragged at [%d, %d]",          event.getX(), event.getY()));   }    // handle event when user moves mouse   @Override   public void mouseMoved(MouseEvent event)   {      statusBar.setText(String.format("Moved at [%d, %d]",          event.getX(), event.getY()));   } } // end inner class MouseHandlerpublic static void main(String[] args){    MouseTrackerFrame mouseTrackerFrame = new MouseTrackerFrame();    mouseTrackerFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   mouseTrackerFrame.setSize(300, 100);    mouseTrackerFrame.setVisible(true); } } // end class MouseTrackerFrame