Comparing two hashmaps for equal values and same key sets?

Question

How can I best compare two HashMaps, if I want to find out if none of them contains different keys than the other, and if the values of that keys match each oth

Answer 1

if you have two maps lets say map1 and map2 then using java8 Streams,we can compare maps using code below.But it is recommended to use equals rather then != or ==

boolean b = map1.entrySet().stream().filter(value -> 
            map2.entrySet().stream().anyMatch(value1 -> 
            (value1.getKey().equals(value.getKey()) && 
  value1.getValue().equals(value.getValue())))).findAny().isPresent();   


System.out.println("comparison  "+b);