Solved

string to BigInteger array

Posted on 2004-10-07
18
2,068 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
 
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
How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

 

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

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
count7 challenge 12 69
countPairs challenge 7 58
topping3 challenge 14 49
for i loop in grovy 1 32
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
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 about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:

707 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now