Since I don't have netbeans right now, I am trying to connect to MySQL database from my Java code through command prompt. But it it is not taking the mysql-coonectivity.jar file.
Does anyone know any way to run my program??? Please help.
Try executing the program as it is windows OS
java -cp .;path\of\your\mysql-connector-java-5.1.6.jar className
In case you don't have the mysql-connector-java-[version].jar get it from here
You need to add your MySQL connector jar file while compiling and running your program, you can do it the following way,
To compile :
javac -g -cp mysql-coonectivity.jar; YourFileName.java
To Run
java -cp mysql-coonectivity.jar; YourMainClass
NOTE: The above written syntax assumes that your jar file is present at same location as of your program.
To execute program in Linux (Ubuntu) OS follow the below command format:
java -cp .:/usr/share/java/mysql-connector-java-8.0.25.jar MainProgram
Note:
Assuming you are in the directory where MainProgram.class is exist
After .(dot -- this is for current directory) there is :(colon) as a separator in Linux
Related
I want to run my Java code in remote server with external jar file. I referred to this tutorial and run IntelliJ IDE to generate a jar file of my whole project. Now I can run the following code in local terminal successfully.
javac -cp /Users/natsuapo/out/artifacts/main_jar/main.jar: new_server_try.java
java -cp /Users/natsuapo/out/artifacts/main_jar/main.jar: new_server_try
The code will run successfully. However, when I try the same thing in server. The compile process can be finished without any errors or warnings.
javac -cp /Users/natsuapo/out/artifacts/main_jar/main.jar: new_server_try.java
I have checked that the class file new_server_try.class is generated in the directory.
However the second step will return error as Could not find or load main class new_server_try and I am not sure why this happens.
on the second command try giving the full package name .. like shown below
java -cp "/Users/natsuapo/out/artifacts/main_jar/main.jar:lib/*" my.package.MainClass
also with operating system the command differs, check below
Windows
java -cp "Test.jar;lib/*" my.package.MainClass
Unix
java -cp "Test.jar:lib/*" my.package.MainClass
I've been trying to run a JAR file that would read from input.txt and write to output.txt this way in console:
java -jar file.jar input.txt output.txt
And it works 100% fine on my machine. I need to run it inside a php script, and this code works 100% fine for me (Mac OS, php built-in server):
exec("java -jar file.jar input.txt output.txt");
But once I deploy it (CentOS server) where the exec function is allowed, it fails, it returns an empty string and the jar does not work, running it directly from shell is OK.
How can I fix that?
Thanks in advance!
The problem with your exec() is that PHP doesn't know where Java is on the server. Update your command to specify the full path to the Java executable and it should work, though you should also use full paths to the jar and text files while you're at it.
I am trying to send differents commands into a java program to start my solr server
My problem is that I a trying to send first the command
cd ~/Desktop/PPE/solr-4.10.3/example
and then
java -jar start.jar
Using the line
Runtime.getRuntime().exec(cmd);
Bug I get an error no such file available. Do you have any idea ?
java -jar /path/to/file/start.jar
you have not given the path of the jar file. This is why it is giving this error, and I hope you have java in your environment variables.
I made a program which runs fine on windows. When I moved it over to CentOS, I got this error:
Error: Could not find or load main class org.wbc.WBCController
This is the file setup and .sh on linux:
And this is the file setup and .bat on windows:
Does anybody know what the problem is, and how I can fix it?
Java will respond with this error even if it cannot find the file wbc.jar. I am guessing that that is your problem. You might want to see that your are executing the shell script from within the right working directory.
Check to see if you can run wbc.sh from the console or put this in wbc.sh to make sure it searches for the jar in the same directory as the shell script:
#!/bin/sh
java -cp `dirname $0`/wbc.jar org.wbc.WBCController
this is the command.
java -cp clojure.jar;sum.jar CalculateSum
sum.jar is a jar file made from clojure and java code.
CalculateSum is file which contains main method of java.
error from cygwin
can't execute binary file, Error 126
Cygwin provides you with a *nix environment within Windows, so that you might have to change the classpath separator to colons:
java -cp clojure.jar:sum.jar CalculateSum
Try:
java -cp clojure.jar:sum.jar:. CalculateSum
If you execute in the place you have the root of packages for CalculateSum.class
java -cp "clojure.jar;sum.jar" CalculateSum this is working