实现可拖动的窗口，实现拖动窗口,public class

实现可拖动的窗口，实现拖动窗口,public class

public class MoveMouseListener implements MouseListener, MouseMotionListener           {               JComponent target;               JFrame frame;               public MoveMouseListener(JComponent target, JFrame frame) {                   this.target = target;                   this.frame = frame;               }               public void mouseClicked(MouseEvent e) {}               public void mouseEntered(MouseEvent e) {}               public void mouseExited(MouseEvent e) {}               public void mousePressed(MouseEvent e) {}               public void mouseReleased(MouseEvent e) {}               public void mouseMoved(MouseEvent e) {}               public void mouseDragged(MouseEvent e) {                   frame.setLocation(new Point(e.getX( ),e.getY( ));               }        Point getScreenLocation(MouseEvent e) {            Point cursor = e.getPoint( );            Point target_location = this.target.getLocationOnScreen( );            return new Point(                (int)(target_location.getX( )+cursor.getX( )),                (int)(target_location.getY( )+cursor.getY( )));        }      Point start_drag;      Point start_loc;      public void mousePressed(MouseEvent e) {          this.start_drag = this.getScreenLocation(e);          this.start_loc = this.getFrame(this.target).getLocation( );      }         public void mouseDragged(MouseEvent e) {             Point current = this.getScreenLocation(e);             Point offset = new Point(                 (int)current.getX( )-(int)start_drag.getX( ),                 (int)current.getY( )-(int)start_drag.getY( ));             JFrame frame = this.getFrame(target);   Point new_location = new Point(                 (int)(this.start_loc.getX( )+offset.getX( )),                 (int)(this.start_loc.getY( )+offset.getY( )));             frame.setLocation(new_location);         }       public static void main(String[] args) {             JFrame frame = new JFrame( );             CalendarHack ch = new CalendarHack( );             ch.setDate(new Date( ));             frame.getContentPane( ).add(ch);frame.setUndecorated(true);           MoveMouseListener mml = new MoveMouseListener(ch, frame);           ch.addMouseListener(mml);           ch.addMouseMotionListener(mml);           frame.pack( );           frame.setVisible(true);       }           }//该片段来自于http://byrx.net