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Merging HashMaps
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I have to merge two hashmaps, one results (contains grades), the other
students(contains students, with exam results. Their exam marks are
averaged out and graded. I need the students to appear in the results
hashmap against their grade, can somebody please point out what is
wrong with the following:

public void collateResults()
char grades[] = {'A', 'B', 'C', 'D', 'F', 'X'};
for (Character grade : grades)
this.results.put(grade, new HashSet<String>());
for (String eachStudent : students.keySet())
for(String graded : this.results.get(eachStudent))

Any help greatly appreciated.


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