Gets one element from the provided Collection. - Java java.util

Java examples for java.util:Collection Element

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Description

Gets one element from the provided Collection.

Demo Code


//package com.java2s;
import java.util.Collection;
import java.util.Iterator;
import java.util.NoSuchElementException;

public class Main {
    public static void main(String[] argv) {
        Collection collection = java.util.Arrays.asList("asdf",
                "java2s.com");
        System.out.println(getAnyFrom(collection));
    }//from   w  w w  .  j  a  v a  2 s . co m

    /**
     * Gets one element from the provided Collection. If no element is present,
     * an Exception is thrown. No guarantee is made as to which element is
     * returned from time to time.
     *
     * @param <T> Collection type
     * @param collection to use
     * @return one element from the provided Collection
     * @throws NoSuchElementException if no elements are present in the
     * Collection
     */
    public static <T> T getAnyFrom(Collection<T> collection) {
        final Iterator<T> iterator = collection.iterator();
        if (iterator.hasNext()) {
            return iterator.next();
        }
        throw new NoSuchElementException("No value present");
    }
}

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