Sha256: 91f889def49e596eceb4c80254d0152dad6de219c898ad14c14f2843921b1dcb
Contents?: true
Size: 1.06 KB
Versions: 78
Compression:
Stored size: 1.06 KB
Contents
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
public class School {
private final Map<Integer, Set<String>> database = new HashMap<Integer, Set<String>>();
public Map<Integer, Set<String>> db() {
// Leaks internal storage to caller
return database;
}
public void add(String student, int grade) {
Set<String> students = grade(grade);
students.add(student);
}
public Set<String> grade(int grade) {
// Leaks internal storage to caller
if (!database.containsKey(grade)) {
database.put(grade, new TreeSet<String>());
}
return database.get(grade);
}
public Map<Integer, List<String>> sort() {
Map<Integer, List<String>> sortedStudents = new HashMap<Integer, List<String>>();
for (Integer grade : database.keySet()) {
// Relies on using a TreeSet internally
List<String> sortedGrade = new ArrayList<String>(database.get(grade));
sortedStudents.put(grade, sortedGrade);
}
return sortedStudents;
}
}
Version data entries
78 entries across 78 versions & 1 rubygems