Thread: Learning Java ~ What are the best choices of tools ?

Oh i just thought its similar to VB runtime.

Originally Posted by newprouser

JRE is well known , I try my best not to use Java appz.

Well the compiler doesn't require the runtime to run right ? It oly provides libraries in destination computer na.

you've mixed things.

compiler's job is to convert .java files into .class files(byte codes). So JRE doesn't come into picture here.

JRE is required when you run a java application.
Suppose I write a java application and after compiling I mail that to you, so that you could run it on your system. So for running my application you need JRE and nothing else.

what i understand from this is,

you do coding and save it as *.java
after compiling , you get a *.class file

well then how are exe files produced under java. there are many software which depend on java but are actually in EXE format , eg limewire and so on.

Originally Posted by newprouser

what i understand from this is,

you do coding and save it as *.java
after compiling , you get a *.class file

well then how are exe files produced under java. there are many software which depend on java but are actually in EXE format , eg limewire and so on.

yes yes yes yes yes... you are right.

Now we come to .exe files.
Converting a java application into executable is like robbing it's souls. exe files are platform dependent while java application are platform independent. So when you do convert a java application into executable, it becomes platform dependent. (exe runs on windows only. right?? correct me if i m wrong.)

yes you are ...

unless you are on wine (some pun for ya)

Originally Posted by newprouser

Oh i just thought its similar to VB runtime.

It is different to it. JRE is a must. For we runs a bytecode not executables. You are right nandini, it is like robbing soul of java applications.

Originally Posted by newprouser

yes you are ...

unless you are on wine (some pun for ya)

yeah.

@npu

If you are just beginning with java ... Throughly go through "JAVA - Complete Reference by Herbert Schildt" ...

I will post in details later ...

Guys , whats your opinion on the book : Java : The Complete Reference by Herbert Schildt... Am currently using it and am finding it quite good. Any other book i should be looking at ?

Although I haven't gone through this book but I've heard that Herbert Schildt is a a good writer.

If you find that book good then it must be good indeed.

I like Java by Khaled Moughal. Nice book!!!

It is a very good book for JAVA beginners.

Originally Posted by saurav_k

@npu

If you are just beginning with java ... Throughly go through "JAVA - Complete Reference by Herbert Schildt" ...

I will post in details later ...

thanks , will look into that too

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btw setting this PATH thingy is confusing like hell, and javac is not running too if I do that. i still have to go bin directory and compile it myself.


and how to run the bytecode aka class file ?

i tried :

java asdf.class

and it didn't work.

Originally Posted by newprouser

thanks , will look into that too

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btw setting this PATH thingy is confusing like hell, and javac is not running too if I do that. i still have to go bin directory and compile it myself.


and how to run the bytecode aka class file ?

i tried :

java asdf.class

and it didn't work.

Did you set the CLASSPATH?

-F

I set the path to the bin folder using "path" command in DOS, if thats what you mean by classpath

No, CLASSPATH is another environment variable which points to the
directory where all your java class files and jar files are there.

-F

something like this:

C:\>env | grep CLASS
CLASSPATH=C:\XMLP562_WIN[1]\XMLP562_WIN\manual\lib\;C:\sample;

follow this...

make one System variable named JAVA_HOME
Set its value to the jdk home directory. like C:\Sun\SDK\jdk

now make one more system variable named path
set its value to the bin directory of your jdk. like C:\Sun\SDK\jdk\bin

you're done now.

Now open command prompt and type javac and hit enter.
If you get a list of help commands,bingo,you did it.
If not...bang your head thrice against the closest wall and repeat the pocedure till you get it right.

Originally Posted by nandini

follow this...

make one System variable named JAVA_HOME
Set it value to the jdk home directory. like C:\Sun\SDK\jdk

now make one more system variable named path
set it value to the bin folder of your jdk. like C:\Sun\SDK\jdk\bin

you're done now.

Now open command prompt and type javac and hit enter.
If you get a list of help commands,bingo,you did it.
If not...bang your head thrice against the closest wall and repeat the pocedure till you get it right.

Nice!
are you know all info about Java?

i learned it but i like C++ than java

Originally Posted by Swifty

Nice!
are you know all info about Java?

i learned it but i like C++ than java

These are the basic things. I am also new to java so know a little bit only.

If you like C++ then you'd love java as well,unless you don't look down upon the persons who're not system programmaers.

Originally Posted by nandini

These are the basic things. I am also new to java so know a little bit only.

If you like C++ then you'd love java as well,unless you don't look down upon the persons who're not system programmaers.

I learned Java As well as advance Java(n/w Programming not in details just overview) & etc.

@ NPU.Open notepad & type this:

set JAVA_HOME= C:\JDK1.6
set CLASSPATH=.;%JAVA_HOME%\lib
set path=%JAVA_HOME%\bin;%path%
start

Save it as a batch file i.e. with extension .bat like NPU.bat.
Note : I have assumed in underlined line that you have install jdk under C:\JDK1.6 name. If you have installed it under any name replaced it with it. You will get a command prompt after executing this file. You will have to use this file again & again when you want to compile. So save it a desktop. It will open in milliseconds.

This will solve your problem .
I have suggested this solution as it is much better to create a batch file as you might not have permission to change global variables everywhere you are expected to compile a program. So this method is better than changing the environment variables.
If there is any other problem pm me & I will reply here.

Originally Posted by nandini

These are the basic things. I am also new to java so know a little bit only.

If you like C++ then you'd love java as well,unless you don't look down upon the persons who're not system programmaers.

Learning C++ is complete wastage of time I too learned it. C is much better for use in system programming. Also Java & C are much better for embedded systems programming. You can do now anything with C which you can do with C++.

(C++) - (troubles) =(Java)

Originally Posted by newprouser

1. Book:

i'm currently using Java for Dummies, since i'm a complete newbie to java. Is it fine or is there any better.

There are a lot of online resources/source code available. I will suggest one book for you "Thinking in Java" as it is very much interesting while learning Java.

2. Specialisation :
There are many versions of Java like SE,EE, Netbeans etc. Which one should I learn first ?

SE is the standard edition (Core Java APT), used for writing any normal application like a desktop application.

EE is the enterprise edition - it is there in the standard jdk. This is the API for EJB (enterprise java beans) to be deployed in application server like jboss, websphere, weblogic, tomcat, classfish,etc.

Netbeans is an IDE from SUN (now opensource) not a java version.

3. IDE

Is it good to use IDE or should I play with cmd ? If yes for IDE, which one is best ?

I see that there are Eclipse,Jcreator,Netbeans ,Jbuilder IDE, so confused.

[/QUOTE]

For beginners I suggest using simple editors like editplus, notepad++, etc (suppoers sytax highlighing). Jcreator is good IDE and fast too compared to others. You can create, manage everything like debug, compile, create jars, etc. Eclipse, netbeans are having lot of features beyond the normal debug,compile, etc. (like mobile application,silverlight support, plugin,EE application and deploying to application server,remote debugging, etc,...) which as a beginner may not require.

I just started with notepad still I use kwrite as I am full time linux user (equivalent to notepad in windows) though one of the interface to our ERP is eclipse plugin interface. My colleagues use editplus, notepad++, jcreator, eclipse, netbeans.

The advantage of using IDE for beginers is they all provide pohelp for methods, member varibles. constants,etc, while using simple editors you have refer java documentation every time.

This post is nostalgic! Brought back my Java programming days (nothing special, just college days )

----

As for the new form on programming is concerned, count my vote in

@npu:
I think most people have suggested good enough books. Herbert Schildt is a good author, you can try that book (Java: Complete Reference)
As for online tutorials, Sun's website itself is comprehensive.

Good luck!

Originally Posted by farce

C:\>env | grep CLASS
CLASSPATH=C:\XMLP562_WIN[1]\XMLP562_WIN\manual\lib\;C:\sample;

sounds greek to me

Originally Posted by nandini

follow this...

make one System variable named JAVA_HOME
Set its value to the jdk home directory. like C:\Sun\SDK\jdk

now make one more system variable named path
set its value to the bin directory of your jdk. like C:\Sun\SDK\jdk\bin

you're done now.

Now open command prompt and type javac and hit enter.
If you get a list of help commands,bingo,you did it.
If not...bang your head thrice against the closest wall and repeat the pocedure till you get it right.

Ummmm, whats a system variable and how do i create one.

BTW i'm using XP.

Originally Posted by mithyavadini

I think most people have suggested good enough books. Herbert Schildt is a good author, you can try that book (Java: Complete Reference)
As for online tutorials, Sun's website itself is comprehensive.

Good luck!

thanks !!

@matrix

rep+

@luke

tried you method with no luck. posting screenshot.

java.JPG

go to computer->properties->advanced->Environmental Variable

There you can set system variable.