Any utility which can print out map quickly

Question

I am wondering any utility to print out map quickly for debugging purpose.

Answer 1

You can just print the toString() of a Map to get a 1-line version of the map, divided up in to key/value entries. If that isn't readable enough, you could do your own looping to print or use Guava to do this:

System.out.println(Joiner.on('\n').withKeyValueSeparator(" -> ").join(map));

That'll give you output of the form

key1 -> value1
key2 -> value2
...

Answer 2

I guess, the .toString() method of implementing class (HashMap or TreeMap for ex.) will do what you want.