CODEWITHSUNDEEP
javabinaryconverters
satincorvo
satincorvo

Reputation: 173

how to convert binary strings longer than 9 characters to integers?

I am working on a program where I am trying to take a binary string and convert it to an integer using this piece of code: 

int x = Integer.parseInt(arrayList.get(count), 2);
//arrayList is a collection of 30 character binary strings
//count is an incrementing integer used to choose which string to use while inside of a while loop

I have tested this program with strings such as "001010", however with larger strings such as "100000110000010100001111010110" compiles, but terminal output gives me an error: 

"@ java.lang.NumberFormatException.forInputString(NumberFormatException.java:(line number))

How can I fix this?

Upvotes: 2

Views: 130

Answers (2)

Sнаđошƒаӽ
Sнаđошƒаӽ

Reputation: 17592

You can try java.math.BigInteger.

String bin = "100000110000010100001111010110";
BigInteger bi = new BigInteger(bin, 2);
System.out.println(bi);

Output:

549536726

You can also do it using Long.valueOf(). However, with Long your binary strings can be up to 63 bits long, whereas with BigInteger the length can be of arbitrarily many bits.

String bin = "100000110000010100001111010110";
long biLong = Long.valueOf(bin, 2);
System.out.println(biLong);

Upvotes: 1

Ankit Shubham
Ankit Shubham

Reputation: 3599

Try Long.parseLong method instead of Integer.parseInt

Upvotes: 0

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