Java Number Max Value max(final NUMBER_TYPE n1, final NUMBER_TYPE n2)

Description

max

License

Open Source License

Declaration

public static <NUMBER_TYPE extends Number> NUMBER_TYPE max(final NUMBER_TYPE n1, final NUMBER_TYPE n2) 

Method Source Code

//package com.java2s;

public class Main {
    public static <NUMBER_TYPE extends Number> NUMBER_TYPE max(final NUMBER_TYPE n1, final NUMBER_TYPE n2) {
        if (n1 == null && n2 == null) {
            return null;
        } else if (n1 == null) {// only one of them is null
            return n2;
        } else if (n2 == null) {// only one of them is null
            return n1;
        }//from   www  .ja v a2 s.com
        final int compared = compareTo(n1, n2);
        if (compared > 0) {
            return n1;
        } else if (compared < 0) {
            return n2;
        } else {
            return n1;
        }
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static <NUMBER_TYPE extends Number> int compareTo(final NUMBER_TYPE n1, final NUMBER_TYPE n2) {
        if (n1 == null && n2 == null) {
            return 0;
        } else if (n1 == null) {// only one of them is null
            return -1;
        } else if (n2 == null) {// only one of them is null
            return 1;
        } else {
            if (!(n1 instanceof Comparable<?>) || !(n2 instanceof Comparable<?>)) {
                throw new IllegalArgumentException("The given numbers must be comparable");
            }
            return ((Comparable) n1).compareTo(n2);
        }
    }
}

Related

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2. max(final int a, final int b)
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7. max(final String string1, final String string2)
8. Max(float a, float b)
9. max(float a, float b)