Java BigInteger From convertToBigInteger(String sequence)

Description

convert To Big Integer

License

Apache License

Declaration

public static BigInteger convertToBigInteger(String sequence) 

Method Source Code

//package com.java2s;
/*/* w  w  w .  j a  va  2  s .c o m*/
 * Copyright 2015 iychoi.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.math.BigInteger;

public class Main {
    public static BigInteger convertToBigInteger(String sequence) {
        BigInteger biSequence = BigInteger.ZERO;
        int kmerSize = sequence.length();
        for (int i = 0; i < kmerSize; i++) {
            char ch = sequence.charAt(i);
            if (ch == 'A') {
                biSequence = biSequence.add(BigInteger.valueOf(0));
            } else if (ch == 'C') {
                biSequence = biSequence.add(BigInteger.valueOf(1));
            } else if (ch == 'G') {
                biSequence = biSequence.add(BigInteger.valueOf(2));
            } else if (ch == 'T') {
                biSequence = biSequence.add(BigInteger.valueOf(3));
            }

            if (i < kmerSize - 1) {
                biSequence = biSequence.multiply(BigInteger.valueOf(4));
            }
        }

        return biSequence;
    }
}

Related

1. ByteArrayToBigIntegerWithoutSign(byte[] array)
2. bytesToBigInteger(byte[] buffer)
3. bytesToBigInteger(byte[] data)
4. bytesToBigInteger(byte[] data, int[] offset)
5. convertToBigInteger(String s)
6. getUnsignedBigInteger(byte[] data, int offset, int length)
7. getUnsignedBigInteger(long x)
8. string2BigInteger(String plaintext)
9. toBigInteger(@Nullable final Boolean value, @Nullable final BigInteger defaultValue)