A frequently asked question in a Java interview is ... When you put something into a HashMap, you'll say HashMap.put('car,' 'Viper'), and 'car' would be the key, 'Viper' would be the value. In this ...

While the Hashtable was part of the initial Java release over two decades ago, the HashMap is the correct key-value store to use today. One key HashMap vs. Hashtable difference is the fact that the ...