ICSE − Q & A

Any output questions.....plz

program to count the number of digits in a number(3 digit or 4 digit...)

+ 1 more questions by krvijay28  

what is the difference between writing a program with and without return type?? give examples as well.
asked by Vijay Kr (krvijay28) 8 years ago
0

Prog. for :
6 6 6 6 6 6
5 5 5 5 5
4 4 4 4
3 3 3
2 2
1

Any1 ? Thanks

To find the index of spaces cant we just write s.indexOf(' '); ?

+ 2 more questions by agrek  

Instance variables are class variables right? If not whats the difference?
asked by Abhishek Agrawal (agrek) 8 years ago
1

Syntax of final keyword with example?
asked by Abhishek Agrawal (agrek) 8 years ago
2

can anyone say in simple language what valueOf()function does

Guys to all those who have got a confusion in static variables and non-static(instance variables ) i found an interesting example which will easily make you understand the difference.....plz see to it patiently....Worthy...
NON-STATIC Variables (Instance variables) : These variables' values are unique to each object of a class 
Example : the currentSpeed of one BICYCLE is different from the currentSpeed of another
STATIC Variables ( Class variables ) : There is exactly one copy of these variables in existence no matter how many objects have been created for a single class.....
Example : No.of Gears for a particular Bicycle can be marked as static since the same number of gears will apply to any other bicycle too ..( here bicycle refers to objects ...that means no matter what object it might be the value of static variable remains same) ...Keyword final can be attached to them if you want the variable's value to be constant througout....
#HopeItHELPED

code for automorphic number below
import java.io.*;
public class Automorphic
{
    public static void main(String args[])throws IOException
     { 
         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
         System.out.println("Enter a no.");
         int n=Integer.parseInt(br.readLine());
         int s= n*n;
         int c=0;
         while(n>0)
         {
             int rem1=n%10;
             int rem=s%10;
             if(rem1!=rem)
             {
                 c++;
                 
                }
                n=n/10;
                s=s/10;
            }
            if (c==0)
           { System.out.println("Automorphic");
            }else
            {System.out.println("not");
        }
    }
}

+ 1 more questions by bhavesh988  

code for happy no. is below import java.io.*; public class happyormagical { public static void main(String args[])throws IOException { BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); System.out.println("Enter a no."); int n=Integer.parseInt(br.readLine()); int sum=n; while(sum>9) { n=sum; sum=0; while(n>0) { int rem=n%10; sum=sum+rem*rem; n=n/10; } } if(sum==1) System.out.println("Happy no."); else System.out.println("Not a Happy no."); } }
asked by Bhavesh Choudhari (bhavesh988) 8 years ago
1

Guys, when they say use comment lines should we write comments wherever possible while writing the program or...is it something else?

(also do you know what are the most predicted prog. questions? :/ )

Thanks!

Is it compulsory to write comments ?

+ 1 more questions by prateek25  

Write a Program to Compare two Strings using Scanner Class.
asked by Prateek Rawat (prateek25) 8 years ago
1

Guys one doubt : can the actual and the formal variables be the same ??
Like boolean b(int a,int b)
And then in main ()
on.b(a,b)
Plz I'm having this confusion for a month;!!