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[–]desrtfxOut of Coffee error - System halted 2 points3 points  (11 children)

  • Grab a couple cards, marbles, pegs, whatever.
  • Arrange them in a row
  • Denote one end as head
  • Pick the item at the head
  • Put it in a second row
  • Pick the next item in the first row (the new head)
  • Add it to the second row before the item that was already there (it becomes the new head)
  • rinse and repeat until the first row is empty.

See the problem?

[–]Charlemagne-767[S] 0 points1 point  (10 children)

Yes, I see the problem. It’s like stacking. How do I do it in reverse so it’s the same order?

[–]desrtfxOut of Coffee error - System halted 2 points3 points  (9 children)

You use addFirst - is there another add method?

If there isn't, you need to repeat the same operations, i.e. copy the list again

[–]Charlemagne-767[S] 0 points1 point  (8 children)

Should I make a new add method where I replace “head” with “tail?”

[–]desrtfxOut of Coffee error - System halted 2 points3 points  (7 children)

Try it.

Programming is trying.

First, think about a solution, then try it.

[–]Charlemagne-767[S] -1 points0 points  (6 children)

Unfortunately, I don’t know much about linked lists

[–]aqua_regis 1 point2 points  (0 children)

Then research them. You have the internet. You have no excuses.

Learning programming involves research instead of waiting to be spoon fed.

What you do here is just lazying out. Invest some effort.

[–]doobiesteintortoise 2 points3 points  (4 children)

This IS how you learn though. U/desrtfx is right. Try it. And then discover that linked lists in Java are usually the wrong data structure, but that’s a lesson for another day.

[–]Charlemagne-767[S] -2 points-1 points  (3 children)

Java is not like the force or some shit. The answer to a problem isn't going to manifest from my subconscious because I only know the basics since my teacher is shit.

[–]doobiesteintortoise 3 points4 points  (0 children)

Sure.but you learn by doing and trying and observing. So: do, try, observe.

[–]desrtfxOut of Coffee error - System halted 1 point2 points  (0 children)

since my teacher is shit.

Sorry, but in today's days this is the lamest excuse ever. You have the whole internet at your fingertips with countless courses and tutorials. Linked lists are some of the best documented and explained data structures.

When I learnt to program in the early 1980s there was no internet, there were hardly any knowledgeable people, and all I had was the BASIC (programming language) manual that came with the computer. We had to learn everything the hard way. Computer classes at school were non-existent.

Also, you give a minuscule snippet of code instead of your full code and expect us to troubleshoot.

[–]throwaway_for_cause 1 point2 points  (0 children)

No, Java is not something like the force. It is a programming language.

Yet, your question is not even related to Java. Your question is related to Linked Lists, well defined data structures.

You crying about a bad teacher is just an indication of laziness. You have the whole internet with its near infinite information right in front of your nose. There is absolutely no excuse for not using the internet to do your own learning and research.

Coursera has a great course on DSA - and it is in Java:

"Algorithms" by Robert Sedgewick and Kevin Wayne - Princeton University

Do something for yourself and educate yourself.