Printing a java map Map – How?

I’m sure there’s some nice library that does this sort of thing already for you… But to just stick with the approach you’re already going with, Map#entrySet gives you a combined Object with the key and the value. So something like:

for (Map.Entry<String, Object> entry : map.entrySet()) {
    System.out.println(entry.getKey() + ":" + entry.getValue().toString());
}

will do what you’re after.

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If you’re using java 8, there’s also the new streaming approach.

map.forEach((key, value) -> System.out.println(key + ":" + value));