Java Collection Size sizeOf(Collection collection)

Description

size Of

License

Apache License

Declaration

public static int sizeOf(Collection<?> collection) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.*;

public class Main {
    public static int sizeOf(Collection<?> collection) {
        if (isEmpty(collection)) {
            return 0;
        }/*from w ww . ja  va2  s . c  o m*/
        return collection.size();
    }

    public static int sizeOf(Map<?, ?> map) {
        if (map == null) {
            return 0;
        }
        return map.size();
    }

    public static boolean isEmpty(Map<?, ?> map) {
        return !isNotEmpty(map);
    }

    public static boolean isEmpty(Collection<?> collection) {
        return !isNotEmpty(collection);
    }

    public static boolean isNotEmpty(Map<?, ?> map) {
        return map != null && map.size() > 0;
    }

    public static boolean isNotEmpty(Collection<?> collection) {
        return collection != null && collection.size() > 0;
    }
}

Related

1. size(final Collection items)
2. sizeM1(Collection collection)
3. sizeOf(Collection collection)
4. sizeOf(Collection collection)
5. sizeOf(Collection coll)