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check if map is not empty java

ShubhamSakharkar answered on March 29, 2024 Popularity 3/10 Helpfulness 4/10

answer check if map is not empty java

check if map is not empty java

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package net.javaguides.lang;

import java.util.HashMap;
import java.util.Map;

public class MapNullOrEmptyExample {

    public static void main(String[] args) {

        // return true
        System.out.println(isNullOrEmptyMap(null));
        System.out.println(isNullOrEmptyMap(new HashMap < > ()));

        Map < String, String > map = new HashMap < > ();
        map.put("key1", "value1");
        map.put("key2", "value2");

        // return true
        System.out.println(isNotNullOrEmptyMap(map));

        // return false
        System.out.println(isNullOrEmptyMap(map));

    }


    public static boolean isNullOrEmptyMap(Map << ? , ? > map) {
        return (map == null || map.isEmpty());
    }

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

}

Popularity 3/10 Helpfulness 4/10 Language java

Source: www.javaguides.net

Tags: java map

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