• 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
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Plz explain me the code

 
Ranch Hand
Posts: 78
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
public class Test{
public static void main(String []args){
int [] [] [] x=new int[3][][];
int i, j;
x[0]=new int[4][];
x[1]=new int[2][];
x[2]=new int[5][];
for(i=0;i<x.length;i++)
for(j=0;j<x[i].length;j++){
x[i][j]=new int[i+j+1];
System.out.println("size="+x[i][j].length);
}
}
}

how many lines of output will be produced?(choose one)
A.7
B.9
C.11
D.13
E.Compilation fails
F.An exception is thrown at run tim

Ans: C

Plz explain me the code
 
Ranch Hand
Posts: 528
Hibernate Eclipse IDE Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi TR. Welcome to JavaRanch (the best site on the planet) .

What is it you don't understand about the code?
 
Priya dharshini
Ranch Hand
Posts: 78
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
the way of the for loop..execution.
 
Marcelo Ortega
Ranch Hand
Posts: 528
Hibernate Eclipse IDE Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Basically we have a three dimensional array, which is nothing more than an array of an array of an array.

The first loop goes through the first array, which holds a 2D array.
The second loop goes through the second array and constructs a third array at the index of [i][j]. Then it simply prints out the length of the newly created 3D arrays.

hth.

Cheers, Marzo.
 
Priya dharshini
Ranch Hand
Posts: 78
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thank u.. But How the output be 11? plz explain me..
 
Marcelo Ortega
Ranch Hand
Posts: 528
Hibernate Eclipse IDE Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The nested loop (the second one) goes through each element of the second array. So the first iteration of the outter loop (on x[0]) will cause the inner loop to 4 times (x[i].length), then 5 times, then 2. 11 LINES of out put all up.

Maybe i didn't explain myself properly, it's just that my boss is walking around and i pause, then unpause the explanation.
 
Marcelo Ortega
Ranch Hand
Posts: 528
Hibernate Eclipse IDE Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
x[0].length = 4
x[1].length = 2
x[2].length = 5
 
Priya dharshini
Ranch Hand
Posts: 78
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thank U.. Marzo Kaahn .. I got it..
 
reply
    Bookmark Topic Watch Topic
  • New Topic