Java Number Minus minusExact(final int a, final int b)

Description

minus Exact

License

Open Source License

Parameter

Parameter	Description
a	An int value.
b	An int value.

Exception

Parameter	Description
ArithmeticException	if the mathematical result of a-b is not in [Integer.MIN_VALUE,Integer.MAX_VALUE] range.

Return

The mathematical result of a-b.

Declaration

public static int minusExact(final int a, final int b) 

Method Source Code

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

public class Main {
    /**/* www .  java2  s.  c o  m*/
     * @param a
     *            An int value.
     * @param b
     *            An int value.
     * @return The mathematical result of a-b.
     * @throws ArithmeticException
     *             if the mathematical result of a-b is not in [Integer.MIN_VALUE,Integer.MAX_VALUE] range.
     */
    public static int minusExact(final int a, final int b) {
        final int diff = a - b;
        // HD 2-12 Overflow iff the arguments have different signs and
        // the sign of the result is different than the sign of "a".
        if (((a ^ b) & (a ^ diff)) < 0) {
            throw new ArithmeticException("integer overflow");
        }
        return diff;
    }

    /**
     * @param a
     *            A long value.
     * @param b
     *            A long value.
     * @return The mathematical result of a-b.
     * @throws ArithmeticException
     *             if the mathematical result of a-b is not in [Long.MIN_VALUE,Long.MAX_VALUE] range.
     */
    public static long minusExact(final long a, final long b) {
        final long diff = a - b;
        // HD 2-12 Overflow iff the arguments have different signs and
        // the sign of the result is different than the sign of "a".
        if (((a ^ b) & (a ^ diff)) < 0) {
            throw new ArithmeticException("integer overflow");
        }
        return diff;
    }
}

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3. minusEquals(double[] w, double v)
4. minusEquals(int[] vals, int min)
5. minusEqualsInverse(double[] w, double[] v, double a)
6. minusExact(long a, long b)
7. minusPercent(float maxValue, float minusValue)
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