logo Practice-It logo

Main Page → Problems → Solve a Problem

mapMystery

Language/Type: Java Collection mystery Sets and Maps
Author: Allison Obourn (on 2020/10/22)

Consider the following method: 

public Set<String> mystery(Map<String, String> data) {
    Set<String> result = new TreeSet<String>();
    for (String s : data.keySet()) {
        result.add(data.get(s));
    }
    return result;
}

The three entries below have specific values for the parameter to method mystery. For each entry, indicate what values would be stored in the set returned by method mystery if the given maps are passed as parameters. 

        map: {baz=c, mumble=d, foo=a, bar=b}

        set returned:__________________________________________________________

        map: {f=z, d=x, e=y, b=y, c=z, a=x}

        set returned:__________________________________________________________

        map: {f=2, g=10, d=20, e=1, b=10, c=2, a=1, h=20}

        set returned:__________________________________________________________
map: {baz=c, mumble=d, foo=a, bar=b}
map: {f=z, d=x, e=y, b=y, c=z, a=x}
map: {f=2, g=10, d=20, e=1, b=10, c=2, a=1, h=20}

You must log in before you can solve this problem.


Log In

If you do not understand how to solve a problem or why your solution doesn't work, please contact your TA or instructor.
If something seems wrong with the site (errors, slow performance, incorrect problems/tests, etc.), please

Is there a problem? Contact a site administrator.