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  1. class supcon
  2. {
  3.    private int x,y;
  4.    supcon(supcon obj)
  5.    {
  6.       x=obj.x;
  7.       y=obj.y;
  8.    }
  9.    supcon(int a,int b)
  10.    {
  11.      x=a;
  12.      y=b;
  13.    }
  14.    void display()
  15.    {
  16.       System.out.println("value of x is :" + x);
  17.       System.out.println("value of y is :" + y);
  18.    }
  19. }
  20. class subcon extends supcon
  21. {
  22.    private int z;
  23.    subcon(subcon obj)
  24.    {
  25.       super(obj);
  26.       z=obj.z;
  27.    }   
  28.    subcon(int a,int b,int c)
  29.    {
  30. //      super(a,b);
  31.       z=c;
  32. 	     super(a,b);
  33.  
  34.  }
  35.    void display()
  36.    {
  37.       super.display();
  38.       System.out.println("value of z is :" +z);
  39.    }
  40. }
  41. class exsuper
  42. {
  43.    public static void main(String[] args)
  44.    {
  45.        subcon obj=new subcon(10,20,30);
  46.        obj.display();
  47.         subcon obj2=new subcon(obj);
  48.         obj2.display();
  49.    }
  50. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:29: cannot find symbol
symbol  : constructor supcon()
location: class supcon
   {
   ^
Main.java:32: call to super must be first statement in constructor
	     super(a,b);
	          ^
2 errors
stdout
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Standard output is empty
https://ideone.com/x03uy
language:
Java (HotSpot 12)
created:
14 years ago
visibility:
public

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