Maps 1, Preparations

Read the introduction on Java Collections - Map and Java Collections - SortedMap.

Consider the following array of person names:

Figure 561. An array of strings
key value
0 "Eve"
1 "Tim"
2 "Rick"
3 "June"
4 "Phyllis"

Set of keys: {0, 1, 2, 3, 4}


Consider the following array describing (non leap year) month lengths:

Figure 562. An associative array describing month lengths
key value
"January" 31
"February" 28
"March" 31
... ...
"December" 31

Set of keys: {"January", "February", "March", ..., "December"}