collectionMystery2

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Main Page → Exercises → Java → Solve an Exercise

Language/Type: Java collection mystery collections

Write the output that is printed when the given method below is passed each of the following pairs of maps as its parameter. Recall that maps print in a {key1=value1, key2=value2, ..., keyN=valueN} format. Your answer should display the right keys and values in the order they are added to the resulting map.

public HashMap<String, String> collectionMystery2(HashMap<String, Integer> map1, HashMap<Integer, String> map2) {
    HashMap<String, String> result = new HashMap<String, String>();
    for (String s1 : map1.keySet()) {
        if (map2.containsKey(map1.get(s1))) {
            result.put(s1, map2.get(map1.get(s1)));
        }
    }
    return result;
}

`map1={bar=1, baz=2, foo=3, mumble=4}, map2={1=earth, 2=wind, 3=air, 4=fire}`
`map1={five=105, four=104, one=101, six=106, three=103, two=102}, map2={99=uno, 101=dos, 103=tres, 105=cuatro}`
`map1={a=42, b=9, c=7, d=15, e=11, f=24, g=7}, map2={1=four, 3=score, 5=and, 7=seven, 9=years, 11=ago}`

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collectionMystery2