boolean present = listofMap1.stream().filter(p -> p.get("ip").equals(map.get("ip"))).findAny().isPresent();

This line of code checks if there is any element in the list "listofMap1" whose value for the key "ip" is equal to the value of the key "ip" in the map "map".

The ".filter()" method is used to filter elements in the stream based on a given condition. In this case, the condition is that the value of the key "ip" in the element should be equal to the value of the key "ip" in the map.

The ".findAny()" method is used to find any element in the stream that matches the filter condition.

The ".isPresent()" method is used to check if there is any element present in the stream after filtering. If there is at least one element present, the method returns true and the boolean variable "present" is set to true, otherwise it returns false and "present" is set to false.