How to store key value pairs in Java without using HashMap or any other collection?

Question

I want to be able to associate values to some keys without using collections. I am aware of HashMaps, but I am trying to explore a more basic way to do it.

For example, if I was to count the frequency of each word in a file, I would take words as keys and frequency as values.

Some languages allow accessing arrays using values as well . For example, Lua.

I also want to be able to access every key with its value.

Answer 1

Have two arrays of equal size

String [] keys = new String [5];
String [] values = new String [5];

keys [0] = "name";
values [0] = "Fred";

String getValue (String key) {

   // loop around keys array to get index of key

   return values [index];
}