Java Collection First getFirstItem(Collection c)

Description

Returns the first item in the collection or null if the collection is empty

License

Open Source License

Declaration

public static <X> X getFirstItem(Collection<X> c) 

Method Source Code

//package com.java2s;
import java.util.*;

public class Main {
    /**/*w ww.ja  va 2 s .  co m*/
     * Returns the first item in the collection or null if the collection is empty
     */
    public static <X> X getFirstItem(Collection<X> c) {
        X o;
        if (c == null || c.isEmpty()) {
            o = null;
        } else if (c instanceof List) {
            o = ((List<X>) c).get(0);
        } else {
            o = c.iterator().next();
        }
        return o;
    }
}

Related

1. getFirstElement(Collection collection, T defaultValue)
2. getFirstElementOrNull(Collection collection)
3. getFirstElementOrNull(Collection coll)
4. getFirstItem(Collection c)
5. getFirstItem(Collection collection)
6. getFirstItemInCollection(Collection collection)
7. getFirstN(Collection objects, int n)
8. getFirstNonNull(Collection c)
9. getFirstNotNullValue(final Collection collection)