Solved

string to BigInteger array

Posted on 2004-10-07
18
2,118 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
  • 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
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
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

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
hibernate example using maven 12 81
spring jars download 1 53
printf performancy 11 86
web project error add remove 1 54
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Viewers will learn about the different types of variables in Java and how to declare them. Decide the type of variable desired: Put the keyword corresponding to the type of variable in front of the variable name: Use the equal sign to assign a v…
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.

733 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