Win a copy of Escape Velocity: Better Metrics for Agile Teams this week in the Agile and Other Processes forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Liutauras Vilda
  • Tim Cooke
  • Paul Clapham
  • Jeanne Boyarsky
Sheriffs:
  • Ron McLeod
  • Frank Carver
  • Junilu Lacar
Saloon Keepers:
  • Stephan van Hulst
  • Tim Moores
  • Tim Holloway
  • Al Hobbs
  • Carey Brown
Bartenders:
  • Piet Souris
  • Frits Walraven
  • fred rosenberger

Inner Class

 
Ranch Hand
Posts: 242
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi All,
class A {
int i = 10;

class A1 {
int i = 20;
}
}
class B extends A {
int j = 30;

B(int i, int j) {
//Here I want to initialize to i variable of A1 class. Is this possible?
this.j = j;
}
}

Thanks.
 
Enthuware Software Support
Posts: 4646
50
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You sure can...
this.j = new A1().i;
HTH,
Paul.
------------------
Get Certified, Guaranteed!
(Now Revised for the new Pattern)
www.enthuware.com/jqplus

[This message has been edited by Paul Anil (edited November 27, 2000).]
 
Santhosh Kumar
Ranch Hand
Posts: 242
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi Paul,
Thanks for the reply. But we wanted to know how to assign some value to variable i in inner class A1.
Santhosh.
 
Greenhorn
Posts: 2
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi Santosh,
The Inner class is known only within the scope of outer class.
So, you should have another method at your class A to assign the parameter value to the inner class variable.
Like this,
class a
{
int i;

class a1
{
int i=20;
}

void assign(int l)
{
a1 a1o = new a1();
a1o.i=l;
}

}
class b extends a
{
int j = 30;

b(int i, int j)
{
super.i=i;
super.assign(i);
this.j=j;
}
}
bye
 
Paul Anilprem
Enthuware Software Support
Posts: 4646
50
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
As your inner class A1 is not private, it is inherited by class B. All you need to do to set i is:
new A1().i = 10; //or whatever.
(Also, if you can do this.j = new A1().i (As I showed before) You can as well do new A1().i = 10; !!!
HTH,
-Paul.
------------------
Get Certified, Guaranteed!
(Now Revised for the new Pattern)
www.enthuware.com/jqplus

[This message has been edited by Paul Anil (edited November 27, 2000).]
 
Santhosh Kumar
Ranch Hand
Posts: 242
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks a lot.
 
Greenhorn
Posts: 5
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
what about if there is no inheritance between class A and B, and I still want to do the same thing in B??
I have tried:
A a = new A();
A.A1 a1= a.new A.A1;
but doesn't work!!!
 
Greenhorn
Posts: 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
hello
You can create the inner class as this :
A.A1 a1= new A(). new A1();
 
reply
    Bookmark Topic Watch Topic
  • New Topic