Windows - Linux, jar-archive problem

Question

I?m programming a project in Eclipse on a WinXP-pc. This project includes some external jar-archives like the mysql-connector. Now I have to run this project on a redhat-linux pc in a shell. Can anybody tell me, where I have to place these jar-files so java and my project will find them?

Answer 1

If I want to compile a file in my project (which is not much more than this single file atm) I have to use javac with the -cp option to specify the location of my external jar, doesn?t I? Yes. Both java and javac need to know the classpath.
Let?s say the file I want to compile is called ApiTest.java. The file and the external jar mysql-connector.jar are placed in the same directory c:\workspace on my windows-machine. Am I right, that the instruction on a command line should look like: "javac -cp c:\workspace\mysql-connector.jar ApiTest.java" executed in c:\workspace?You should include the current directory in the classpath. (with "dot")
javac -cp .;c:\workspace\mysql-connector.jar ApiTest.java
I have the added the mysql-connector.jar to my classpath by using "set classpath=...". But when I try to compile my file, I get the error-message package com.mysql does not exist (com.mysql is the directory-structure in the mysql-connector.jar)... ;(I don't use a CLASSPATH variable. In any case its value is ignored when you set the classpath using -cp. Hence the need to specify the current directory as part of the classpath.
Is there a com.mysql package? I ask because when I use the line "import com.mysql.*;", I get the same error. There is no such package to be found in the version of mysql-connector I am using: mysql-connector-java-5.0.5-bin.jar (512707 bytes).
Putting a similarly named TestApi.java and the jar file into ~/JDC/workspace, here's what I see:
    pbrockway@linuxdeskd6off:~/JDC/workspace$ cat ApiTest.java\\    import java.sql.Connection;\\    import java.sql.DriverManager;
    public class ApiTest {\\        public static void main(String args[]) throws Exception {\\            Class.forName("com.mysql.jdbc.Driver").newInstance();\\            String urlStr = "jdbc:mysql://10.144.32.16/jdc?user=jdcuser&password=jdcpw";\\            Connection con = DriverManager.getConnection(urlStr);\\            System.out.println(con);\\        }\\    pbrockway@linuxdeskd6off:~/JDC/workspace$ javac -cp .:mysql-connector-java-5.0.5-bin.jar ApiTest.java\\    pbrockway@linuxdeskd6off:~/JDC/workspace$ java -cp .:mysql-connector-java-5.0.5-bin.jar ApiTest\\    com.mysql.jdbc.Connection@1113708\\    pbrockway@linuxdeskd6off:~/JDC/workspace$It compiles and runs OK. Things are exactly the same on Windows except that in both cases ; is used rather than : when specifying the classpath.