Get the max value from Iterator and Comparable - Java java.util

Java examples for java.util:Iterator

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Description

Get the max value from Iterator and Comparable

Demo Code


//package com.book2s;
import java.util.ArrayList;

import java.util.Comparator;
import java.util.Iterator;
import java.util.List;

public class Main {
    public static void main(String[] argv) {
        Iterator iterator = java.util.Arrays.asList("asdf", "book2s.com")
                .iterator();/*w ww  . ja  va2 s .c  o m*/
        System.out.println(max(iterator));
    }

    public static <T extends Comparable<? super T>> T max(
            Iterator<? extends T> iterator) {
        T next, candidate = iterator.next();
        while (iterator.hasNext()) {
            if ((next = iterator.next()).compareTo(candidate) > 0) {
                candidate = next;
            }
        }
        return candidate;
    }

    public static <T> T max(Iterator<? extends T> iterator,
            Comparator<T> comparator) {
        T next, candidate = iterator.next();
        while (iterator.hasNext()) {
            if (comparator.compare(next = iterator.next(), candidate) > 0) {
                candidate = next;
            }
        }
        return candidate;
    }

    public static <E> List<E> asList(
            @SuppressWarnings("unchecked") final E... array) {
        List<E> list = new ArrayList<>(array.length);
        for (E element : array) {
            list.add(element);
        }
        return list;
    }

    public static <E> List<E> asList(final Iterator<? extends E> iterator) {
        List<E> list = new ArrayList<>();
        while (iterator.hasNext()) {
            list.add(iterator.next());
        }
        return list;
    }
}

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