Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.*;

public class Main {
    /**
     * Returns the size of the specified collection. If the specified collection is null, this method returns the specified default size.
     *
     * @param c           Collection of Objects referencing the collection to retrieve the size from.
     * @param defaultSize int referencing the size to be returned when the collection is null.
     * @return int referencing the size of the collection, or the default size when the collection is null.
     */
    public static int defaultSizeIfNull(Collection c, int defaultSize) {
        return (c == null ? defaultSize : c.size());
    }

    /**
     * Nullsafe method returning the number of elements the incoming collection contains.
     *
     * @param c Collection of Objects to count the number of elements from
     * @return int containing the number of the elements in the collection, or -1 if the collection is null
     */
    public static int size(Collection c) {
        int size = -1;

        if (c != null) {
            size = c.size();
        }

        return size;
    }

    /**
     * Nullsafe method returning the number of entries the incoming map contains.
     *
     * @param m Map of Map.Entry objects to count the number of entries from
     * @return int containing the number of the entries in the map, or -1 if the map is null
     */
    public static int size(Map m) {
        int size = -1;

        if (m != null) {
            size = m.size();
        }

        return size;
    }
}