Wouldn't compile

Question

Hello, I have problem compiling java classes that are in a package. Every time I try to compile a java file that extends another class, the DOS window gives me error messages. It points out those classes that are being imported.
Could please tell me how to compile it so that it can see other dependent classes.
Thanks for your help.

Answer 1

BATCH files does a bunch of things you. These things could be repeative tasks or something uttly boring you cant be arsed to do it over and over again. Ok on with exerice.
If YOU have windows 98/95 or some MSDOS you can wot i am about to show read on if you have:
Two things i need to show you.
1) 101 batch files explained
2) how you compile with batch files.
Ok here is a QUICK 101 on BATCH files in windows.
1) Open up a a new text editor and then add the following
---Start of batch file---
rem This is a comment it gets ignored.
rem
rem the "rem" in the middle is a BLANK.
mkdir c:\testdir
SET MYTEMPPATH=C:\testdir
echo "MY MYTEMPPATH="%MYTEMPPATH---End of batch file---
2) Save it as "c:\btest.bat"
3) Make sure it is a "btest.bat" as some programs adds more extensions like "btest.bat.txt"
3) Run it as if it was an executable. Browse for it in some explorer and run. You will lots of text pop up and that ECHO.
4) Check your c:\ harddrive. You will see testdir made.
OK ON WITH COMPILING!
1) Start simple. Make java file and save it as "mybtest.java". Save it into "c:\testdir" directory.
public class mybtest {
  public void main(String[] args) {
     System.out.println("Hellow world BTEST");
}2) Compile manually by running the following command
"c:\j2sdk1.4.2_01\bin\javac -classpath c:\testdir mybtest.java"
Basically you are telling javac where to find the .java files to compile. As there is only one file in one directory, i have only declared c:\testdir
It should compile. If it has check the c:\testdir to make sure the .class exists.
Run "c:\j2sdk1.4.2_01\bin\java c:\testdir\mybtest.java" to see the java program work.
3) Edit your test batch file i asked you to make. Get rid of all the lines in there. Then put in the following.
rem---START BATCH COMPILER----
set MYAPPPATH=c:\testdir
c:\j2sdk1.4.2_01\bin\javac -classpath %MYAPPPATH% mybtest.javarem---END OF MY NEW BATCH COMPILER------
4) Save it
5) Edit your "btest.java" make it show something different.
public class mybtest {
  public void main(String[] args) {
     System.out.println("Hellow world compiled by a batch file");
}6) Save it and then go run that c:\btest.bat
7) Check it has worked by runing
"c:\j2sdk1.4.2_01\bin\java c:\testdir\mybtest.java" to see the java program work.
You should see it has worked.
HOW THAT BATCH FILE WORKED(if it has worked for that matter)
"rem [SOME STATEMENT you want to show during batch] "Comment command
"set MYAPPPATH=c:\testdir"This sets up a variable called MYAPPPATH with the data "c:\testdir"
"c:\j2sdk1.4.2_01\bin\javac -classpath %MYAPPPATH% mybtest.java"The batch will prepare the variables and run the command. It calls up your variable data by using %[variablename]% it echos out that data.
If you dont have a clue what i am saying still, try look up in google "batch processing [you operating system make]" If all else fails. Try reading
http://java.sun.com/docs/books/tutorial/getStarted/cupojava/index.html