Java BigInteger Calculate min(BigInteger a, BigInteger b)

Description

Since Math.max() doesn't handle BigInteger

License

Open Source License

Parameter

Parameter	Description
a	Can be null
b	Can be null

Return

the max of a,b, or null if both are null

Declaration

public static BigInteger min(BigInteger a, BigInteger b) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.math.BigInteger;

import java.util.Collection;

public class Main {
    /**//from  w  ww. j a v  a 2s .  co  m
     * 
     * @param xs
     *            Can contain nulls -- which are ignored
     * @return this will be a member of the xs
     */
    public static <N extends Number> N min(Collection<N> xs) {
        assert !xs.isEmpty();
        double min = Double.POSITIVE_INFINITY;
        N minn = null;
        for (N number : xs) {
            // skip null!
            if (number == null) {
                continue;
            }
            double x = number.doubleValue();
            if (x < min) {
                min = x;
                minn = number;
            }
        }
        return minn;
    }

    /**
     * @param values
     *            Must not be zero-length or null
     * @return min of values (remember that -100 beats 1 - use min + abs if you
     *         want the smallest number)
     */
    public static double min(double... values) {
        double min = values[0];
        for (double i : values) {
            if (i < min) {
                min = i;
            }
        }
        return min;
    }

    /**
     * Since Math.max() doesn't handle BigInteger
     * 
     * @param a Can be null
     * @param b Can be null
     * @return the max of a,b, or null if both are null
     */
    public static BigInteger min(BigInteger a, BigInteger b) {
        if (a == null)
            return b;
        if (b == null)
            return a;
        int c = a.compareTo(b);
        return c > 0 ? b : a;
    }
}

Related

1. jsonBigInteger(JsonValue value)
2. length(BigInteger bi)
3. listToBigInteger(List list)
4. log2(BigInteger x)
5. maskBits(BigInteger value, int bits)
6. modPow(BigInteger base, BigInteger e, BigInteger m)
7. modPowByte(byte[] arg, BigInteger e, BigInteger n)
8. modPowLong(BigInteger n, long exponent, BigInteger modulo)
9. mods(BigInteger v, BigInteger m)