com.javarush.task.task37.task3704

Solution.java

package com.javarush.task.task37.task3704;

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

/* 
Фикс бага
*/
public class Solution
{
    public static void main(String[] args)
        {
        Map expectedMap = getExpectedMap ( );

        System.out.println ( "********* Add obj with NULL key *********" );
        expectedMap.put ( null, "text 1" );
        System.out.println ( expectedMap.size ( ) );
        System.out.println ( expectedMap.get ( null ) );

        System.out.println ( "*********  Add obj with 0 key *********" );
        expectedMap.put ( 0, "text 2" );
        System.out.println ( expectedMap.size ( ) );
        System.out.println ( expectedMap.get ( null ) );
        System.out.println ( expectedMap.get ( 0 ) );

        System.out.println ( "********* Keys *********" );
        for (Object o : expectedMap.keySet ( ))
            {
                System.out.println ( o );
            }
        System.out.println ( "********* Values *********" );
        for (Object o : expectedMap.values ( ))
            {
                System.out.println ( o );
            }

        /* Expected output
********* Add obj with NULL key *********
1
text 1
*********  Add obj with 0 key *********
2
text 1
text 2
********* Keys *********
0
null
********* Values *********
text 2
text 1
         */
        }

    public static Map getExpectedMap()
        {
        return new HashMap ( );
        }
}