compileing with .jar file

[Eung maeng]

Does anyone explain to me how to compile or whether it is possible instead of import com.vertex....etc;

thanks,

[Christophe Verré]

You'll always need the "import" whether you use JAR files or not.

[Eung maeng]

thanks, do i need to extract .jar for compiling the source if .jar contains a classes.

thanks a lot,

[Christophe Verré]

No, just inlude the JAR in your classpath.
For example javac -cp c:/myjars/bob.jar;. Hello.java

[Eung maeng]

thanks,

I tried to compile a source on dos prompt with your command like javac -cp.... -CP option is not valid for compiler.

anotherone,
e.g,
a test.java source is in c:\APP\PGM\
and
import B.UTIL.Iaddress;
import B.UTIL.Ilookup;
....

jar is in c:\lib\utility.jar what contains for Iaddress and Ilookup etc..

In this case, where I need to compile and how , what I have to do for compile.

Please let me know if it's not good exampe for your answer.

Regards,

[Roseanne Zhang]

use -cp for java command is fine
However, you must spell it out -classpath for javac command

Who knows why? But we have to follow it.

here is the official help from the commands

C:\Documents and Settings\rzhang>java
Usage: java [-options] class [args...]
           (to execute a class)
   or  java [-options] -jar jarfile [args...]
           (to execute a jar file)
 
where options include:
    -client       to select the "client" VM
    -server       to select the "server" VM
    -hotspot      is a synonym for the "client" VM  [deprecated]
                  The default VM is client.
 
    -cp <class search path of directories and zip/jar files>
    -classpath <class search path of directories and zip/jar files>
                  A ; separated list of directories, JAR archives,
                  and ZIP archives to search for class files.
    -D<name>=<value>
                  set a system property
    -verbose[:class|gc|jni]
                  enable verbose output
    -version      print product version and exit
    -version:<value>
                  require the specified version to run
    -showversion  print product version and continue
    -jre-restrict-search | -jre-no-restrict-search
                  include/exclude user private JREs in the version search
    -? -help      print this help message
    -X            print help on non-standard options
    -ea[:<packagename>...|:<classname>]
    -enableassertions[:<packagename>...|:<classname>]
                  enable assertions
    -da[:<packagename>...|:<classname>]
    -disableassertions[:<packagename>...|:<classname>]
                  disable assertions
    -esa | -enablesystemassertions
                  enable system assertions
    -dsa | -disablesystemassertions
                  disable system assertions
 
C:\Documents and Settings\rzhang>javac
Usage: javac <options> <source files>
where possible options include:
  -g                        Generate all debugging info
  -g:none                   Generate no debugging info
  -g:{lines,vars,source}    Generate only some debugging info
  -O                        Optimize; may hinder debugging or enlarge class file
  -nowarn                   Generate no warnings
  -verbose                  Output messages about what the compiler is doing
  -deprecation              Output source locations where deprecated APIs are used
  -classpath <path>         Specify where to find user class files
  -sourcepath <path>        Specify where to find input source files
  -bootclasspath <path>     Override location of bootstrap class files
  -extdirs <dirs>           Override location of installed extensions
  -d <directory>            Specify where to place generated class files
  -encoding <encoding>      Specify character encoding used by source files
  -target <release>         Generate class files for specific VM version

[Eung maeng]

thanks, -cp =-classpath

[Eung maeng]

hi,
How do I define multiple .jar for compile?

thanks a lot,

[Roseanne Zhang]

semicolon ; separated path for Windows
Use colon : for unix

[Christophe Verré]

Pau, sorry for the wrong compiler argument.