₦airaland Forum

this.amt = amt;

asalimpo:
download
1. javadoc. it's a zip file
2. winrar - for opening zip files
3. notepad++ - for coding initially until you know what's going on under the hood
4. emacs,vim - for knowing what a long lived text editor is like. Never used them though,
but people who have say they're revolutionary.
Try them,they have a learnng curve.
5. some ides - i dont use ides . but for some coders they're the ish.
6. all the ebooks you can get on the programming language your are targeting.
7. A generator/inverter/solar: you 'll need constant power.
8. 3 years - be patient, you wont really know what is going on until 3 years + of heavy work.
Just keep doing it.
9. A mentor - some1 who's been there,done that. If you can't find one, pay the time cost.
like i said 3 years of constant coding and learning b4 u enter stage 1 - white belt.
10. stubborness and willingless to fail a lot - when i started there was no stack overflow,
no nairaland nothing. Installing the java compiler and writing hello world took almost 6 hrs!!
but i eventually did it. If youd dont have that kind of persistence , just forget it.
Many people start out wanting to do programming but 10,stops them. They soon fall by the way side.
if your calculator gets spoilt can your write one,after a few years of learning programming?
10,is bulldog tenacity to get it solved or die trying. Can you go that long? debug a program all thru the night? 10 is everything.

pcguru1:
All you need is Java SE and you are good, intact once you pass the basic data types and OOP you can start, Android Development though React native would have been faster for you but its good to learn the Native first in case you wan build plugins for Cordova or React Native for future.

pcguru1:
Java for Small Phones -> J2ME Don't bother no one does this anymore Android has taken over, I used to write in this during a Nokia Academy in CCHUB

Java for PC -> Swing, JavaFX , To be sincere JavaFX has more effects but I see Swing used more , but these days everyone uses Electron (Memory Hogger)

Java for Android -> Actually it uses Java to talk to it's API not that it runs Java, it's Unix under so Java is used to talk to the underlying API which is in C++ that's why Android game dev use C++ and write their own apps in NDK (no experience here )

They are referring to the Virtual Machine I think a more experienced Android Dev can comment on that, Here is what you should do, reading the whole book won't work once you covered the basic follow this approach of building an application that works, start with console applications, it can even be tools you need for yourself,

try a simple app that takes input from user and stores to a txt file, that will expose you to File API, using bytes to read contents and FileStream, gradually you will understand how to approach problems and code. caio

pcguru1:
Java for Small Phones -> J2ME Don't bother no one does this anymore Android has taken over, I used to write in this during a Nokia Academy in CCHUB

Java for PC -> Swing, JavaFX , To be sincere JavaFX has more effects but I see Swing used more , but these days everyone uses Electron (Memory Hogger)

Java for Android -> Actually it uses Java to talk to it's API not that it runs Java, it's Unix under so Java is used to talk to the underlying API which is in C++ that's why Android game dev use C++ and write their own apps in NDK (no experience here )

They are referring to the Virtual Machine I think a more experienced Android Dev can comment on that, Here is what you should do, reading the whole book won't work once you covered the basic follow this approach of building an application that works, start with console applications, it can even be tools you need for yourself,

try a simple app that takes input from user and stores to a txt file, that will expose you to File API, using bytes to read contents and FileStream, gradually you will understand how to approach problems and code. caio

avniel:
i was given also valid for 7days but unfortunately I cant use it cause it on my small phone and its a micro sim my big phone uses nano

asalimpo:
Just use what you have but for those who've gone before u , consider their advice.
Notepad for coding - No No.
You want my opinion- use a programmers text editor -first,learn to compile from the command line.
Then learn to set classpath and put jar files in them. Learn how to use javadocs.
After that, you can go use whatever ide u choose.

Y learn without an ide first? - to simply know how things work under the hood.
if you learn how things work under the hood,you'll be a stronger more knowledgeable coder.
It's like learnng basic arithmetics without a calculator-at first,y? It makes your brain stronger..

asalimpo:
When i was learning, home internet was 5 years away (when mtn and glo released their dongles).
It was all cyber cafe all the way. if you're stuck no quick dash to the net to solve ur problems.
No youtube then?
I think it all boils down to laziness. intellectual laziness. That's y programming is the only (or one of the few) professions where people cant bluff their way thru easily. You either can program or not. That's y there's scarcity of good coders. This generation of instant everything has made people lazy asses. pathetic

pcguru1:
exactly which makes it more annonying, these are question you can google and solve, I think dev of this gen have too much hand-holding, when i was learning programming Stack Overflow and Programming communities didn't exist.

asalimpo:
You are using notepad for coding ... You remind me of me when i first started.
Your problems will multiply going that route.
Get an ide or a java programming text editor like notepad++.
Download the documentation for your language. It's essential.
It seems your arent learning in a structured disciplined manner but just trying things out - maybe using web snippets or youtube videos. Get a good book- and slug through it,that way you wont come here asking
redundant questions.

pcguru1:
No but it will teach you how to read JavaDocs especially when you realize everything is an Object and there's a class that handles what you need. if you had read a book you would come across the things needed for what you are asking, parsing String as Int, because your question clearly shows you need to even understand Computer Data types first before even java

pcguru1:
Note: Methods i don't think function is the right word though

pcguru1:
Dude seriously just stop and go and read a proper book, This is hand holding, do some research and stuff , WHat i said suffices already just go and read a book, it will save you all this question asking.

pcguru1:
An integer is a decimal charat is for string , that would mean you convert int to String and use a char at and convert back to Int but that's an odd operation what's the purpose for ?

pcguru1:
Thanks I realized I sent value of instead of parseInt

babawarunn:
As pcguru1 said. Go and read a good java book. I recommend Java How to program.

This is the solution you need if you want to go about it the way you have written your code.

System.out.println(Integer.parseInt(String.valueOf(g.charAt(m))) * (int) Math.pow(b, a));

g.chartAt(m) : returns char '1'

String.valueOf('1') : returns String "1"

Integer.parseInt("1" : returns integer 1

1 * 27 = 27.

There is no shortcut. Take time to read a good java book, you will avoid mistakes like this.

sunsyde:
use Integer.parseInt (g.charAt(m)) to cast from "1" to 1

pcguru1:
1 and '1' are not the same go and read data type , you can't question a bunch of smart researchers who built this ,because its what the world runs on, they'd prob have a smart reason for that.

pcguru1:
Ignore I said that

pcguru1:
ASCII when memory was scare and highest was 2 bytes so they thought of smart ways to hold data.

pcguru1:
Integer.valueof you also need to learn reading Java Docs and OOP too, working on enterprise systems mehn you will need to, and Java docs is anything but straight forward

pcguru1:
Integer
https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html

pcguru1:
255 sorry not 256

pcguru1:
So I hate being curious I was intrigued as to why you got 1323 so when you say Charat it fetched the index 0 which points to 1 however in this case '1' and the fact that you used Interger you forced char to be converted to decimal in which in the Ascii table that's a 49 and you multiplied that by 27 which gave you your result. You're lucky you didn't exceed 256 past the size of the char I don't think it would have been a result you'd be able to explain.

pcguru1:
You are multiplying String with Integer why not cast to int before doing that, read a proper book