inputting large numbers into java

I want to do an analysis (once) using a java program on a very large amount of digits (1000). My question is: how do I hard code it or input it in my program? I tried hard coding it, but it won't except literals that exceed the int limit.

edit: So I want those 1000 digits to go into a 1000 member integer array.

Have you tried using BigInteger?

Try to use double data type

double myvar = 0.0;

http://thecodewall.blogspot.com

Quote:

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Originally Posted by thecodewall

Try to use double data type

double myvar = 0.0;

The Code Wall

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Sure, a double has only less than 16 digits of accuracy; the answer either is to use BigInteger or an ordinary int (or short or char or byte) array.

kind regards,

Jos

thanks for this info.
The Code Wall

How do you hardcode BigIntegers?

Quote:

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Originally Posted by imorio

How do you hardcode BigIntegers?

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I don't, I simply use the BigInteger class; why reinvent the weel?

kind regards,

Jos

// sample from Programming tutorials and source code examples

import java.math.BigInteger;
public class Main {
public static void main(String[] argv) throws Exception {
// Create via a string
BigInteger bi1 = new BigInteger("1234567890123456890");

// Create via a long
BigInteger bi2 = BigInteger.valueOf(123L);

bi1 = bi1.add(bi2);
bi1 = bi1.multiply(bi2);
bi1 = bi1.subtract(bi2);
bi1 = bi1.divide(bi2);
bi1 = bi1.negate();
int exponent = 2;
bi1 = bi1.pow(exponent);

}
}

http://thecodewall.blogspot.com

Ah, this is a start. That would about halve the lines needed. So hardcoding a 1000 digits into an integer array would go like this:

Code:

---

BigInteger temp;
temp=new BigInteger("first 20 digits");
f1(temp);
temp=new BigInteger("next 20 digits");
f1(temp);
temp=new BigInteger("next 20 digits");
f1(temp);
...
...
temp=new BigInteger("last 20 digits");
f1(temp);

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With f1 being a function that puts the digits into an integer array.

Quote:

---

Originally Posted by imorio

Ah, this is a start. That would about halve the lines needed. So hardcoding a 1000 digits into an integer array would go like this:

Code:

---

BigInteger temp;
temp=new BigInteger("first 20 digits");
f1(temp);
temp=new BigInteger("next 20 digits");
f1(temp);
temp=new BigInteger("next 20 digits");
f1(temp);
...
...
temp=new BigInteger("last 20 digits");
f1(temp);

---

With f1 being a function that puts the digits into an integer array.

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If you want those 1000 digits to repesent one single number, do this:

Code:

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StringWriter sw= new StringWriter();
String line;
while ((line= reader.readLine()) != null)
  sw.write(line);
BigInteger bi= new BigInteger(sw.toString());

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kind regards,

Jos