jQuery in Action, 2nd edition*
The moose likes Programmer Certification (SCJP/OCPJP) and the fly likes Access Modifiers Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
Bookmark "Access Modifiers" Watch "Access Modifiers" New topic
Author

Access Modifiers

Samira Mastali
Ranch Hand

Joined: Aug 03, 2001
Posts: 74
Hi Folks,
Can anybody explain me why the following line in the code is Illegal?
class Complex {
private double real, imaginary;
public Complex (double r, double i) { real = r; imaginary = i;}
public Complex add (Complex c) {
return new Complex (real + c.real, imaginary + c.imaginary);
}
}
class Client {
void useThem () {
Complex c1 = new Complex (1,2);
Complex c2 = new Complex (3,4);
Complex c3 = c1.add(c2);
double d = c3.real; // Illegal!
}
}
what I don't understand is that c3 is an instance of class complex and we can have access to a private member of a class through an instance of that.What is difference between c3 and c1 and c2?
Thanks,
Samira
rahul kumar
Ranch Hand

Joined: Feb 24, 2001
Posts: 75
class Complex {
private double real, imaginary;
public Complex (double r, double i) { real = r; imaginary = i;}
public Complex add (Complex c) {
return new Complex (real + c.real, imaginary + c.imaginary);
}
}
class Client {
void useThem () {
Complex c1 = new Complex (1,2);
Complex c2 = new Complex (3,4);
Complex c3 = c1.add(c2);
double d = c3.real; // Illegal!
}
}
Although c3 is an instance of complex but private variables can't be acessed outside the class.real is private variable thatwhy it can't be accessed in other class client
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Access Modifiers
 
Similar Threads
Possible error in CJ2CSG?
Access Modifiers
Doubt in RHE page 78(new edition)
why this code fragment is illegal?
modifiers