Quick Question

[proper grove]

Why in a class, it wont allow me to access the string of the firstname, even if the firstname is a string.

[alpine shore]

<@&987246399047479336> please have a look, thanks.

[faint silo]

ur msiunderstanding the problem

[rotund hemlock]

1. you are accessing it, but the err is coming because if demands a boolean value

[faint silo]

the issue is that what u wrote isnt a conditiion

if what?

if string makes no sense

[rotund hemlock]

2. you frogot to return a value

[faint silo]

if string empty? if string John?

thats sth that works

but not if string

[rotund hemlock]

string.isEmpty()

[faint silo]

if (firstName.equals("John"))

if (firstName.isEmpty())

and so on

the thing inside the if must be a boolean, i.e. true or false

[proper grove]

Or it could be a way to check if the first name is null?

[faint silo]

then u need to write that expliciitly

[proper grove]

We use: "firstName.isEmpty()"?

[faint silo]

if (firstName == null)

dependiing on what u want to check

[proper grove]

And if i do want to say if its not null, i do: ?
if (firstName != null) {}

[faint silo]

yes 👌

as long as java eventually gets if (boolean) its happy

[pulsar canopy]

Unlike C, you can't test the nullity of a reference directly... There's no truthiness until you have a boolean condition.

[proper grove]

So the checking can also be done without making the strings of the class a boolean, which its awesome!

[proper grove]

Yeah forgot about that!

In general i think when we run a IF statement, what we actually say is: "If the condition or not, then do that or else."

[proper grove]

Yeah i forgot abt that a bit.

[proper grove]

and if i do like this:
if (firstName != null && lastName != null) {}
It will still work?

[faint silo]

sure

[proper grove]

As it should mean: "If the first name and the last name is not null, then do that"

[faint silo]

if (boolean && boolean) and that resolves to if (boolean) as well

[proper grove]

Interesting man!

Thanks allot

[proper grove]

I was doing a challenge from Modern java and got confused a bit when i saw it didn't work to check the names 😭

But ig from mistakes we learn