Example of Nested Class in Java

class Total 
             { 
                 int TMarks; 
                 float Percentage; 
                 void DisplayTotal(int x, int y) 
                   { 
                      TMarks = x+y; 
                     System.out.println("Total Marks are : "+TMarks); 
                   } 
                     void DisplayPercentage() 
                        { 
                           Percentage=(float)TMarks/2000*100; 
                          System.out.println("Percentage is : "+Percentage); 
                        } 
             } 
                      class StudentDetail 
                         { 
                             int Rno,Science,Social; 
                             String SName; 
                             Total g = new Total(); 
                             void setData(int p, String q,int r, int s) 
                                  { 
                                      Rno=p; 
                                      SName=q; 
                                      Science=r; 
                                      Social=s; 
                                  } 
                                      void ShowDetail() 
                                          { 
                                               System.out.println("Roll Number : "+Rno); 
                                               System.out.println("Students Name : "+SName);    
                                               System.out.println("Science Marks : "+Science); 
                                               System.out.println("Social Study Marks : "+Social); 
                                               g.DisplayTotal(Science, Social); 
                                               g.DisplayPercentage(); 
                                          } 
                        }; 
                                        class NestedClass 
                                            { 
                                                public static void main(String args[]) 
                                                   { 
                                                       StudentDetail SDetail = new StudentDetail(); 
                                                       SDetail.setData(11,"Deepak Kumar",45,85); 
                                                       SDetail.ShowDetail(); 
                                                   } 
                                            };