Superclass Reference

[Mithran Perry]

public class Test1910 {
float f;
Test1910(){
this(f);
f = 3;
}
Test1910(float f){
System.out.println(f);
}
public static void main(String args[]) {
Test1910 t = new Test1910();
}
}


When I compile the above program, the compiler says,

"cannot reference f before supertype constructor has been called this(f)."

but if pass this(4) it compiles and runs.

Could anyone explain the compiler error.

Thanks in advance,
Mithran

[santosh kothapalli]

The compiler is trying to say initialize the variable f before it is passed to another constructor,it is as similar as accessing a variable without initialisation.

cheers,
Santosh.

[Abhijit Sontakey]

Its not a problem of initialisation. f is an instance variable of the class.
It cannot be passed as argument to the constructor from within another constructor as the class is yet instantiated. Make f a static variable and the program will compile properly.

[Hiren Dutta]

Yes..I think Abhijit is right. we can't access the instance variable before instanciate the object. As static variable is the class property we can access it.