JFileChooser对象调用getCanonicalPath()、getAbsolutePath()的区别

JFileChooser fileChooser = new JFileChooser();
String fileName1,fileName2;

         if (fileChooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION)
          {
               fileName1 = fileChooser.getSelectedFile().getAbsolutePath();

               fileName2 =fileChooser.getSelectedFile().getCanonicalPath();

                  System.out.println(fileName1);
                  System.out.println(fileName2);                                            
           }


输出结果都一样:
D:\照片\http_imgloadCAISE2D4.jpg
D:\照片\http_imgloadCAISE2D4.jpg


那这两个函数有什么区别吗？                                    
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