How print out the contents of a HashMap in ascending order based on its values?

Question

I have this HashMap that I need to print out in ascending order according to the values contained in it (not the keys

Answer 1

the for loop of for(Map.Entry entry: codes.entrySet()) didn't work for me. Used Iterator instead.

Iterator<Map.Entry<String, String>> i = codes.entrySet().iterator(); 
while(i.hasNext()){
    String key = i.next().getKey();
    System.out.println(key+", "+codes.get(key));
}

Answer 2

while (itr.hasNext()) {
    Vehicle vc=(Vehicle) itr.next();
    if(vc.getVehicleType().equalsIgnoreCase(s)) {
        count++;
    }
}

Answer 3

1. Create a TreeMap<String,String>
2. Add each of the HashMap entries with the value as the key.
3. iterate the TreeMap

If the values are nonunique, you would need a list in the second position.

Answer 4

It's time to add some lambdas:

codes.entrySet()
    .stream()
    .sorted(Comparator.comparing(Map.Entry::getValue))
    .forEach(System.out::println);

Answer 5

the simplest and shortest code i think is this:

public void listPrinter(LinkedHashMap<String, String> caseList) {

    for(Entry entry:caseList.entrySet()) {
        System.out.println("K: \t"+entry.getKey()+", V: \t"+entry.getValue());
    }
}

Answer 6

Java 8

map.entrySet().stream().sorted(Map.Entry.comparingByValue()).forEach(System.out::println);