When to use Properties and when Map in Java?

Question

Difference between Map and Properties as both have key-value pair.

Answer 1

The Properties Class implements the Map-Interface. The Properties Class has Methods to save its content to a Stream.

look at: http://java.sun.com/j2se/1.3/docs/api/java/util/Properties.html

If you do not need to save the content, stay with a "normal" Map Implementation like HashMap