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There are multiple ways to iterate or loop a Map in Java.
Using foreach in Java 8
If you using Java 8 this is the easiest way to loop the Map.
Using stream() in Java 8
This is also using in Java 8. If you want to filter some data while looping this is one of best way to do that.
Using iterator through map
This way is more suitable for when you need to remove some data while iterating.
Using iterator through the KeySet
Original post :- http://mydevgeek.com/6-ways-iterate-loop-map-java/