Software update

Can be done using iterator and .next() in the print statement

Ok so again I had to look at the answer to even begin to understand the question. Here's what you need to know if you don't want to do that just yet yourself. the goal is such The input list contains a city followed by a family name aka Chicago - Capone, New York - Rockefeller, Seattle - Gates. This was not clear you take 6 linked pieces of information in the order they give and you make a collection out them. then once you get to the break line - line 7 of the input you stop collecting. next you display the information linked to the item they give you in input line 8. and that is how you solve this. the trick is some of the code they give you already is usable and a lot has to be modified to your chosen collection. I hope whoever reads these comments from CodeGym redoubles their effor to make these examples more clear in terms of both what is being asked and what is being given.

I really don't understand this task meaning , e.g create a HashMap to deal with only one object. where to use this approach, instead the task should create a HashSet , a address class and wrap it inside the HashSet and them sort the family by city , so the Set implementation would be loadded with as many address you want.

Hint if you're stuck (spoiler): Add a HashMap. /*if your input .isEmpty then break loop, otherwise add to HashMap*/, Finally search your HashMap for a match and print :)

like Florin1 said, the input example shows city, then family, in that pattern. Didn't realize that for a while, but afterwards, made sense to use HashMap with its key-value. Also, it was cool to know you don't have to loop to print (although, realized after already looping it). Happy coding! :)

A pattern to the input Name of person = name of city + 1 Using an Arraylist, you can use a for loop to display the value of (i+1) for whatever value of (i) entered

If you're using hashmaps, entries can be null in this particular exercise. So if you use a break statement after an empty condition, the first field will be null and the second field would be null. It will still work on your output. No condition is needed when checking the keys. you can pass the arguments in the sysout parameters.

Hint: Example input area gives city and, on the next line, the family name.

Nullpointer exception on 26.line. Why? Please help

can i get an explanation on the question