How to sort Map values by key in Java?

Question

I have a Map that has strings for both keys and values.

Data is like following:

\"question1\", \"1\"
\"question9\", \"1\"
\"que

Answer 1

A good solution is provided here. We have a HashMap that stores values in unspecified order. We define an auxiliary TreeMap and we copy all data from HashMap into TreeMap using the putAll method. The resulting entries in the TreeMap are in the key-order.