Get size from an array entities. - Java Collection Framework

Java examples for Collection Framework:Array Length

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Description

Get size from an array entities.

Demo Code


//package com.java2s;

public class Main {
    public static void main(String[] argv) {
        Object[] entities = new String[] { "1", "abc", "level", null,
                "java2s.com", "asdf 123" };
        System.out.println(getSizeFromArray(entities));
    }//from  w  ww  . ja  va2 s  .c  om

    /** Get size from an array entities.
     *
     * @param entities to get its size.
     * @return entities size.
     */
    public static Integer getSizeFromArray(Object[] entities) {
        return isNotEmpty(entities) ? entities.length : 0;
    }

    /** Test if entities array is not empty.
     *
     * @param entities to test if is not empty.
     * @return true if entities is not null and its length is more than zero.
     */
    public static boolean isNotEmpty(Object[] entities) {
        return !isEmpty(entities);
    }

    /** Test if entities array is empty.
     *
     * @param entities to test if it is empty.
     * @return true if entities array is null or entities array length is zero.
     */
    public static boolean isEmpty(Object[] entities) {
        return entities == null
                || (entities != null && entities.length == 0);
    }
}

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