Solved

string to BigInteger array

Posted on 2004-10-07
18
2,146 Views
Last Modified: 2012-06-21
I have a string (contents) wich is a concatation of numbers (129012002150...) and I use every group of 3 to load a BigInteger array with them:

BigInteger[] B_array;
Int i;

i = 0;
for (int x=0; x < contents.length()-3; x+=3)
{
B_array[i] = BigInteger.valueOf(contents.substring(x,x+3)));
i = i +1;
}

and it doesn't work. I want to have in my B_array something like:
129
12
2
150
.
.
0
Comment
Question by:edi02
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 12
  • 5
18 Comments
 
LVL 37

Expert Comment

by:zzynx
ID: 12248743
BigInteger.valueOf() doesn't take a String
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12248750
Try

B_array[i] = new BigInteger(contents.substring(x,x+3));
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12248827
This works:

        String contents = "129012002150";
        BigInteger[] B_array = new BigInteger[contents.length()/3];      // <<<<< have to new these ones
        int i = 0;
        for (int x=0; x <= contents.length()-3; x+=3) {                        // x <= instead of x <
            B_array[i] = new BigInteger(contents.substring(x,x+3));
            i++;
        }
0
What Is Transaction Monitoring and who needs it?

Synthetic Transaction Monitoring that you need for the day to day, which ensures your business website keeps running optimally, and that there is no downtime to impact your customer experience.

 
LVL 37

Expert Comment

by:zzynx
ID: 12248845
Add

        for (int  j=0; j<B_array.length; j++)
            System.out.println( ((BigInteger)B_array[j]).floatValue());

To check the result
0
 

Author Comment

by:edi02
ID: 12248864
thanx
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12248961
You're welcome.
Kindly close this Q if you feel like your problem is solved.
0
 

Author Comment

by:edi02
ID: 12248979
May i ask u one more question ...

How do you transform from Integer to BigInteger?
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12249031
       Integer i = new Integer(2000);
        BigInteger b = new BigInteger("" + i);
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12249054
Or

       BigInteger b = BigInteger.valueOf(i.intValue());
0
 

Author Comment

by:edi02
ID: 12249171
I tried that and got this error:

C:\Second\second.java:167: int cannot be dereferenced
p_calc[indic] = BigInteger.valueOf(p_found.intValue());                                          
Were i have at the start:

private static BigInteger[] p_calc = new BigInteger[100];
0
 

Author Comment

by:edi02
ID: 12249195
This worked:

p_calc[indic] = new BigInteger("" + p_found);
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12249330
>> int cannot be dereferenced

if p_found is an int then that should have been
      p_calc[indic] = BigInteger.valueOf(p_found);

The one you wrote would work id p_found was an Integer
0
 
LVL 37

Accepted Solution

by:
zzynx earned 125 total points
ID: 12249510
Still questions/problems?
0
 

Author Comment

by:edi02
ID: 12249872
Ahh hopefully the last one ... :-)

Trying to convert a String to a Char. I know exactly my Strings are all between 0 and 255. So im sure they will have each of them a Char representation.

0
 
LVL 37

Expert Comment

by:zzynx
ID: 12250089
Do you mean a String that contains from "0" to "255" ?
>> String to Char
You mean Character of char?

      String s = "123";
      char c = (char) Integer.parseInt(s);
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12250174
Since you posted another Q for that last question, please close this one.
0
 
LVL 5

Expert Comment

by:Naeemg
ID: 12250273
can this code help u out.

String myStr = "ThisData";
Char[] myChar = new Char[myStr.getLength()];

for(int i = 0; i < myStr.getLenght(); i++)
     myChar[i] = myStr.charAt(i);


Bye
Naeem Shehzad Ghuman
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12250367
Thanks.

(Better accept the real "answer" as answer for the people that read it afterwards)
0

Featured Post

SharePoint Admin?

Enable Your Employees To Focus On The Core With Intuitive Onscreen Guidance That is With You At The Moment of Need.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question