classname(datatype arg1,...)
{
super(args..);
statements
---------
}
class Set
{
protected int n1,n2;
public Set(int x,int y)
{
n1=x;
n2=y;
}
public int sum()
{
int s=n1+n2;
return s;
}
public double mean()
{
double m=sum()/2.0;
return m;
}
}
class XSet extends Set
{
protected int n3;
public XSet(int x,int y,int z)
{
super(x,y);
n3=z;
}
public int sum()
{
int s=super.sum()+n3;
return s;
}
public double mean()
{
double m=sum()/3.0;
return m;
}
}
class demo
{
public static void main(String args[])
{
Set a=new Set(4,5);
System.out.println("Sum of set a is "+a.sum());
System.out.println("Mean of set a is "+a.mean());
XSet b=new XSet(1,2,4);
System.out.println("Sum of set b is "+b.sum());
System.out.println("Mean of set b is "+b.mean()) ;
}
}
Sum of set a is 9 Mean of set a is 4.5 Sum of set b is 7 Mean of set b is 2.333333