Java

Can anyone point me in the direction of a good IDE / set up for working on Java projects across multiple computers? I'm fairly n00bish but would like to work on my PC, pick it up on my laptop, continue on the pc etc.

I know IntelliJ is a favourite around here, but is it good for working on multiple computers? I can't figure out how to do that.

I use google drive a lot for other work but if I needed some kind of USB flash drive to keep the folder syced, it would be okay.

Thanks

Julo0sS

any IDE will fit, you just have to decide how/where you keep your files...^^

CrashBandicoot

@Julo0sS It says "use a loop"

Not sure which one to use...

CrashBandicoot

12:30 PM

I would've used a switch statement, but they want a loop

motaa

@CrashBandicoot you want the solution? :D

@CrashBandicoot check this out https://paste.ofcode.org/BRZLcs5tuRgvCf2psgzHvD
it is NOT a solution

just a hint :D

motaa

12:57 PM

@CrashBandicoot paste.ofcode.org/9kP8dvHWfMP3hfVkf7my7X the solution with comments on how I would solve it

forgot a 'm' at line 11

CrashBandicoot

1:12 PM

@motaa Thanks so much for the effort!

I understand it

Morning, Java!

hi

hi Michael

Where did isWeekend come from on line 7?

@motaa

Michael

Hey @motaa @Julo

motaa

1:16 PM

@CrashBandicoot it is a method in your class at line 17

CrashBandicoot

Oh yeah xD

Sorry

For this: write a while loop that prints out pairs of numbers that show n and 2^n as long as n is less than 10.

How do I get a value for 2^n?

motaa

@CrashBandicoot note that if your loop goes beyond 7 it will always put out "today"

CrashBandicoot

without using the Math.pow function

@motaa Cool :)

motaa

as a loop

CrashBandicoot

I've done this:

paste.ofcode.org/HggQVuwQSd7NSuYBephjkJ

But obviously, line 10 is incorrect

motaa

1:21 PM

where does it get n?

do you have to input it?

CrashBandicoot

Yeah

It has to start from 0

motaa

and count up?

CrashBandicoot

yeah

Fasev Moweasck

is it possible to put conditional statements on a where clause? LOL. sorry i know i intended to ask on the wrong room

motaa

and that 10 times?

CrashBandicoot

1:23 PM

well yeah

motaa

or is that optional on what number you put it in as n?

CrashBandicoot

It has to be 0

motaa

@FasevMoweasck where clausE? :D

Fasev Moweasck

yes!

CrashBandicoot

SQL xD

motaa

1:24 PM

ah true :D

Fasev Moweasck

SQL yes

CrashBandicoot

I'd think so yes

motaa

I am pretty sure that it's possible

CrashBandicoot

@motaa I just need to know a way of getting a previous value of "n" and outputting 2^n

motaa

@CrashBandicoot I want to know how do you pass 'n' into your programm? Is that some input a user has to type in on the console or you just put it into your class

CrashBandicoot

1:26 PM

I initialised it in the class

int n = 0

motaa

so you set the value directly in your class then? :)

CrashBandicoot

yes

motaa

ok lets go through this then

so what kind of loop would you use?

CrashBandicoot

for loop

motaa

because you know beforehand that you iterate exaclty 10 times and always start from 0

CrashBandicoot

1:33 PM

yes

motaa

in your case I would actually fo with a while loop but it also works with a for loop

as you have written in your code, you print sth out in every iteration

CrashBandicoot

hmm ok

sth?

motaa

something

also we now need a way of calculation the powers without using math.pow

for that I would either use a recursive method or just a simple loop

CrashBandicoot

Okay

How would I do that?

motaa

@CrashBandicoot gimme a sec I am currently writing it :D

CrashBandicoot

1:42 PM

Okay cool

Appreciate you helping me :)

motaa

@CrashBandicoot paste.ofcode.org/bptzP3UBtUesYU72wHXuCU

CrashBandicoot

I can't use a "power" method

motaa

one thing this is not easy to read so I will rewrite it in a better to understand form

you are not using a power method

you are using you own method to calculate powers

CrashBandicoot

Oh yeah, sorry

The original questions gives a hint:

just base it on the previous value and multiply it by 2

motaa

and that is what my recursive method does

but I am currently reformulating it in a second version using just a loop

CrashBandicoot

1:47 PM

Okay cool

Thanks!

Hans1984

did you finish all codingbat tasks yet?

:P

CrashBandicoot

@Hans1984 It was very difficult for me

I decided to step down a little

Hans1984

it is very difficult

motaa

@CrashBandicoot check this out paste.ofcode.org/bPpqctJtMucbHZULFqY6L3

Hans1984

more so for a beginer

CrashBandicoot

1:57 PM

@motaa Do I use both of those recursive methods?

motaa

no

CrashBandicoot

The thing is, it was meant to be a short exercise

Just to test myself on conditionals xD

motaa

I just mentioned several methods to show you that there are other ways

and that the first recursive method is written in a style which is not that clear for beginners at first :)

binPower and binPowerLarge are exactly the same

CrashBandicoot

@motaa Thanks so much for the help!!

motaa

just written differently

nowadays people seem to love one liners

CrashBandicoot

2:03 PM

Yeah!

@motaa paste.ofcode.org/9kP8dvHWfMP3hfVkf7my7X

On line 7

I don't quite understand why (i) is used

Hans1984

well the method isweekend()

expects an int value

which is i

@CrashBandicoot

Madara Uchiha

@CrashBandicoot How would you implement it without the i?

motaa

suppose your weekdays are numbered from 1-7 monday = 1 sunday = 7

CrashBandicoot

@Hans1984 Oh right

So, it's just taking the value of i, which the isWeekend() method requires

Hans1984

exactly

motaa

2:10 PM

as I said any value except 6 and 7 will return false

CrashBandicoot

and runs the loop

Makes sense!

Thanks a lot guys!

Madara Uchiha

@CrashBandicoot Read the code

motaa

the loop runs outside :)

Madara Uchiha

See where i is used and what's being done with it

The ability to read code and "run" the program in your mind to predict what the program will do is an important skill that you should practice.

It's a skill most developers take for granted

motaa

@MadaraUchiha and that you will master over time by practicing :D

besides the isWeekend method needs to be static

Madara Uchiha

2:12 PM

Yes, that's true.

(both)

CrashBandicoot

@MadaraUchiha Thanks for the advice!

@motaa How would you debug that code you sent?: paste.ofcode.org/bptzP3UBtUesYU72wHXuCU

I'm presuming you put breakpoints on lines 9 and 18?

and then run the debug?

motaa

2:31 PM

it depends

usually I would put in unit tests for this

in which case I only start debugging when an actual error occurs :)

btw in your exercise about weekends

you could have solved it aswell using a switch case

CrashBandicoot

Yeah I could have

But they specified that I should use a loop

I'm asked to practice with the debugger with each exercise

motaa

of course you keep using the loop

CrashBandicoot

oh right

I understand

motaa

you would use the switch case inside your is weekend method

CrashBandicoot

oh well, as long as it works :)

@motaa thanks!

motaa

2:41 PM

but to be honest a switch case would be a little overkill for that task :D

CrashBandicoot

I've tried reading though using a debugger, but it doesn't make sense

I don't know where to put the breakpoints and how to debug... xD

motaa

what ide are you using?

think about debugging this way

first of all you need to get a grab at what is going wrong... for example you expect somewhere in your program a certain result

but somehow it does not work

I try to give you a simple example soon... my ranked just started ^^

CrashBandicoot

Eclipse

It says "See if you can get it to show you the specific values at each step of execution"

Transcript for