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Java MCQs

What is the best way to access a HashMap of SortedSet entries?

Map String, SortedSet String>>makeSetMap = new HashMap String, SortedSet String>>(); for (String key : makeSetMap.keySet()) { // loop through all manufacturers SortedSet String> cars = makeSetMap.get(key); for (String c : cars) { // loop through all cars of that key System.out.println(key + " " + c); } }

Map<String, SortedSet<String>>makeSetMap = new HashMap<String, SortedSet<String>>(); for (String key : makeSetMap.keySet()) { // loop through all manufacturers SortedSet<String> cars = makeSetMap.getValue(key); for (String c : cars) { // loop through all cars of that key System.out.println(key + " " + c); } }

HashMap<String, SortedSet<String>>makeSetMap = new HashMap<String, SortedSet<String>>(); for (String key : makeSetMap.keySet()) { // loop through all manufacturers SortedSet<String> cars = makeSetMap.get(key); for (String c : cars) { // loop through all cars of that key System.out.println(key + " " + c); } }

HashMap<String, SortedSet<String>>makeSetMap = new HashMap<String, SortedSet<String>>(); for (String key : makeSetMap.getKeys()) { // loop through all manufacturers SortedSet<String> cars = makeSetMap.get(key); for (String c : cars) { // loop through all cars of that key System.out.println(key + " " + c); } }

Answer

Correct Answer: Map String, SortedSet String>>makeSetMap = new HashMap String, SortedSet String>>(); for (String key : makeSetMap.keySet()) { // loop through all manufacturers SortedSet String> cars = makeSetMap.get(key); for (String c : cars) { // loop through all cars of that key System.out.println(key + " " + c); } }

Explanation:

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