Shortest way to reverse Properties

Question

In Java I have a java.util.Properties object and I want to obtain another one with the same pairs but keys converted to values and viceversa.

If there are c

Answer 1

A Properties object is a Hashtable object, so you should be able to do something like:

Hashtable reversedProps = new Hashtable();

for (String key : props.keySet()) {
    reversedProps.put(props.get(key), key);
}

Result: 3 lines of code.

This code is untested, but it should give you the idea.