Example of Super Method in Java

class Rectangle 
             { 
                 int l,b,a; 
                 Rectangle() 
                     { 
                         l=5;      
                         b=3; 
                     } 
             
                     Rectangle(int x) 
                       { 
                           l=x; 
                           b=3; 
                       } 
                           Rectangle(int x,int y) 
                              { 
                                  l=x; 
                                  b=y; 
                              } 
                                 void GetArea() 
                                  { 
                                       a=l*b; 
                                       System.out.println("Area of Rectangle is : "+a); 
                                  } 
                    } 
                                       class Volume extends Rectangle 
                                           { 
                                       int h,v; 
                                       Volume() 
                                       { 
                                           super(); 
                                           h=30; 
                                       } 
                                                  Volume(int x) 
                                       { 
                                           super(x); 
                                           h=30; 
                                       } 
                                           Volume(int x, int y) 
                                                         { 
                                                             super(x,y); 
                                                 h=30; 
                                             } 
                                                 Volume(int x, int y, int z) 
                                                     { 
                                                        super(x,y); 
                                                    h=z; 
                                                 } 
                                                    int getVolume() 
                                                       { 
                                                          v=l*b*h; 
                                                          return(v); 
                                                        } 
                                  } 
                                       class SuperClassEx 
                                          { 
                                                          public static void main(String args[]) 
                                                { 
                                                     Volume Vol = new Volume(); 
                                                     Volume Vol1=new Volume(5); 
                                                     Volume Vol2=new Volume(5,2); 
                                                     Volume Vol3=new Volume(5,3,2); 
                                                     System.out.println("Volume of First Rectangle is : "+Vol.getVolume()); 
                                                     System.out.println("Volume of Second Rectangle is : "+Vol1.getVolume()); 
                                                     System.out.println("Volume of Third Rectangle is : "+Vol2.getVolume()); 
                                                     System.out.println("Volume of Fourth Rectangle is : "+Vol3.getVolume()); 
                                                } 
                                         }