c4mar
asked on
java1.22 setup
Hi, I am interesting at java. However, I have problem to setup the problem since I am self study about java. Currently I had download the jdk1.22, kawa and Jdk 1.22 API into my computer.
After I read through the JDK1.22 API, I still no idea how to setup this thing to run my application. Therefor I jus wondering is there any Web address to guide me through how to setup the run time enviement???? Cause I am thinking to make 2D and 3D window in my application, and I keep on getting "thread in main, java.lang.... not found" such message. Due to teh setup problem, my process is going nowhere. I really need a hand on this to get me to start up. Thanks
After I read through the JDK1.22 API, I still no idea how to setup this thing to run my application. Therefor I jus wondering is there any Web address to guide me through how to setup the run time enviement???? Cause I am thinking to make 2D and 3D window in my application, and I keep on getting "thread in main, java.lang.... not found" such message. Due to teh setup problem, my process is going nowhere. I really need a hand on this to get me to start up. Thanks
Start here:
http://java.sun.com/docs/books/tutorial/
You can even download it and store it locally.
You do NOT need to set classpath at all in JDK1.2. It just adds confusion for new-comers.
Make a HelloWorld.java file containing:
//HelloWorld.java
public class HelloWorld {
public static void main(String args[]) {
System.out.println("Hello World");
}
}
//end of file
Compile it by:
javac HelloWorld.java
Run it by:
java HelloWorld
Things to notice:
1) <installdir>\bin needs to be in your path (i think you have that already
2) Java is case sensitive!!!! Make sure you have upper and lower case letters correct
3) The public class name has to be EXACTLY the same as the file name
4) Use the .java extension when compiling but DO NOT use the .class extension when running. (Dont ask why.. i have no clue)
The above should get you so that you can compile and run your first simple program.
If this doesnt work copy/paste the exact error you receive.
http://java.sun.com/docs/books/tutorial/
You can even download it and store it locally.
You do NOT need to set classpath at all in JDK1.2. It just adds confusion for new-comers.
Make a HelloWorld.java file containing:
//HelloWorld.java
public class HelloWorld {
public static void main(String args[]) {
System.out.println("Hello World");
}
}
//end of file
Compile it by:
javac HelloWorld.java
Run it by:
java HelloWorld
Things to notice:
1) <installdir>\bin needs to be in your path (i think you have that already
2) Java is case sensitive!!!! Make sure you have upper and lower case letters correct
3) The public class name has to be EXACTLY the same as the file name
4) Use the .java extension when compiling but DO NOT use the .class extension when running. (Dont ask why.. i have no clue)
The above should get you so that you can compile and run your first simple program.
If this doesnt work copy/paste the exact error you receive.
Hold off on the Java3D API til you get confortable with 2D.
Java3D is an add-on. It is not built in to the current JDK release.
Java3D is an add-on. It is not built in to the current JDK release.
jerch changed the proposed answer to a comment
ASKER
Thanks, I just wanting does the packetage setup in the same way too??? I mean when I create my own package class. Do I need to setup some path for it too??
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Alternatively you can "install" your package.
make your package a jar file (or multiple packages in a jar file)
and place in your <installdir>\jre\lib\ext\ directory
JDK/JRE1.2+ will look to this directory before looking at the classpath env variable for all your compiling and running needs.
Then you can import like Jerson said above.
make your package a jar file (or multiple packages in a jar file)
and place in your <installdir>\jre\lib\ext\ directory
JDK/JRE1.2+ will look to this directory before looking at the classpath env variable for all your compiling and running needs.
Then you can import like Jerson said above.
set classpath=.;
if you're using linux
(sh and bash shell),
CLASSPATH=.;
EXPORT CLASSPATH
(csh and tcsh shell)
setenv CLASSPATH=.;