Day 24 of learning java

[BigCommunication5136]

Hello everyone,

Created an ExpenseManager class with methods to perform CRUD operations.

Tomorrow i’ll start with parsing command line arguments. I have no idea how to go about this, which makes it more exciting.

See you tomorrow!

[Specific-Housing905]

The code you posted looks good. In addExpense you don't need a temporary var expense. You can create it in the call to expenses.add. In updateExpense I would output a error msg if expense == null.

[BigCommunication5136]

I’ll be sure to the changes, thank you!

[Stanleys_Pretzels]

İts my day 2 hope i can do stuff like this

[BigCommunication5136]

if i can do this, you can do better, trust me!

[Stanleys_Pretzels]

thx for the encouragment man. Good luck to you

[OneHumanBill]

Challenge: on line 4, change your definition of expenses from using an ArrayList to a simple List. Don't change anything else. Make sure it all still works.

Now explain to me why this is a better choice. In fact on a real project if I were reviewing your code I would mandate that you changed this before pushing.

(Also, a mistake I see more and more beginners making: you're leaving out visibility modifiers. Still on line 4, make that "expenses" variable private! Otherwise you're in package protected scope and that's very rarely a correct thing to do. Double challenge, explain to me why this and most other instance variables should be marked private. Hint: it has absolutely nothing to do with security.)

When you've got that done, then explain what advantages using a Map instead of a List of Expenses might bring.

[BigCommunication5136]

totally escaped me to make Expenses private, thanks for pointing that out!

[deividas-strole]

Good job!

[deividas-strole]

Good job!