Adding jar to classpath.

I want to add a .jar file to the classpath, but I don't know how.

"
SimpleFTP is a Java FTP client package that lets you connect to FTP servers and upload files.

Download simpleftp.jar
Using SimpleFTP in your Java programs

To use SimpleFTP, simply add simpleftp.jar to your classpath and import the package in whichever classes will use it.

import org.jibble.simpleftp.*;

"

So I downloaded it, but now what? In what folder should I put it?
Because if I do
import org.jibble.simpleftp.*;
now, when compiling it to a class file it says it cannot find the
import org.jibble.simpleftp.*;
..


DudeJonne

Do u want in windows or Linux/unix?

Just in windows.

If you are using an IDE then add the jar file to your project's build path. (More details for this are supplied in your IDE's help files).

If you are compiling from the command line then add the -classpath flag to javac and supply the path to the jar file including the jar file's name. More details of this can be obtained by typing javac -help on the command prompt.

Okay I typed:
javac -classpath C:\simpleftp.jar

And got this error:
C:\>javac -classpath C:\simpleftp.jar
javac: no source files
Usage: javac <options> <source files>
use -help for a list of possible options

I don't really get it, since -classpath is the option and C:\simpleftp.jar are the files..

No one who knows?

Quote:

---

javac -classpath C:\simpleftp.jar

---

You mostly had it, for running javac, specify the classpath like that, but we still need to specify the java file to be compiled

Code:

---

javac -classpath c:\simpleftp.jar *.java

---

(such as in your java sources folder).
another option, if you ar using eclipse, or other IDE, and have our sources in a project, create a folder (e.g. lib) and place the jar file in there, and have the jar file added to the project's classpath.

you will also need to have the jar file in the classpath when running your compiled code.

Code:

---

java -classpath c:\simpleftp.jar;. mypackage.mycode

---

where assuming you un java from the folder that contains your package and your class file.

If you in turn bundle your code into a jar file, then the classpath would reference both jar files.

Code:

---

java -classpath c:\simpleftp.jar;c:\myproject\myjar.jar mycode

---

If you have constructed your jar file to be executable, such as set the Main-Class attribute in the manifest file when building the jar file, then just java -jar myfile.jar would also work.

but then how would I import that package?

well, from the first description it looks like this simpleftp.jar is more of an API, and not a full functional self-contained program, as when it sais to import its classes,

Quote:

---

import org.jibble.simpleftp.*;

---

this likely means you would create a myclient.java file, with this in the imports

Code:

---

import org.jibble.simpleftp.*;

public class myFtpClient {
  //TODO; methods where you would invoke their FTP thingie.
}

---

Never mind, I just worked, thanks

Its just too bad I keep getting errors, I never know what they mean, like this when I run the image.class:

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/jibbl
e/simpleftp/SimpleFTP

Quote:

---

Originally Posted by dudejonne

Okay I typed:
javac -classpath C:\simpleftp.jar

And got this error:
C:\>javac -classpath C:\simpleftp.jar
javac: no source files
Usage: javac <options> <source files>
use -help for a list of possible options

I don't really get it, since -classpath is the option and C:\simpleftp.jar are the files..

---

You should read javac's error diagnostic message: it doesn't have anything to do because you didn't supply it at least one source file to compile, i.e. you have set it all up by supplying a classpath but no .java source file.

kind regards,

Jos