- 1). Initialize your map as necessary (if you are already working with a map, you can skip this step):
Map<String, String> map = new HashMap<String, String>();
map.put("Hello", "World");
map.put("Java", "Is Fun");
map.put("Programming", "Rules"); - 2). Get the key set from your map:
Set<String> keys = map.keySet(); - 3). Since the Set interface extends both the Collection and Iterable interfaces, you can work with it just as you would either of those:
for (final String key: keys) {
System.out.println("Key: " + key);
}
Your output should be similar to this:
Key: Programming
Key: Java
Key: Hello
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