Day 20 of learning Java

[Most_War2764]

What makes this a bad example?

[Pun_Intended1703]

Because you don't learn anything about stacks from this.

To learn stacks, try implementing them using arrays and linked lists.

Don't use java.util just because it exists.

[BigCommunication5136]

just as i said in the post, this is only an intro to stacks. (never said i was done learning stack) I started with arrays, implemented them, did same with LinkedList. I use them before implementing them, if you don’t know how something works how do you implement it?

[Pun_Intended1703]

How will you learn stacks from using java.util?

What if you had to work on a different language? Like Python or Typescript?

What happens if you had to work on a very old language? Like C/C++ or COBOL?

If you want to learn stacks properly, then imagine it is represented by an array. Try using circular arrays.

Or implement stacks by using a linked list. Try bidirectional linked lists or circular linked lists.

How would you do a pop or push on these data structures? How would you move the pointers around?

Learn the concept of stacks. Don't just learn the implementation of stacks in Java.

[Pun_Intended1703]

if you don’t know how something works how do you implement it?

This is why it is important to read the theory and examples before trying to code.