CODEWITHSUNDEEP
javaserializationsizebiginteger
Sara
Sara

Reputation: 2436

How to save a very large binary code in java

I want to save a very large number like 111111111100000001010 in an ArrayList in java. After saving I should be able to find the number of bytes needed to save it. The number is found using a function String Find_code(int input). How can I efficiently save it in memory? For example 21 bits for 111111111100000001010.

Upvotes: 0

Views: 244

Answers (2)

Steve Kuo
Steve Kuo

Reputation: 63054

If 111111111100000001010 is a binary number, then it will fit in an integer. Simply store it in an array list of integers ArrayList<Integer>.

Upvotes: 1

Robert Harvey
Robert Harvey

Reputation: 180787

Use a BitSet.

This class implements a vector of bits that grows as needed. Each component of the bit set has a boolean value. Individual indexed bits can be examined, set, or cleared.

Upvotes: 3

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