Develop Reference

Java Class path in different directory

I'm trying to invoke a java class that is not in current directory. Ive set -classpath flag and ensured that the class file is also there in the path. But im getting the following error
Error: Could not find or load main class Fileversion
Bat file code
java -classpath x:/LCMSLatestLibrary/Fileversion/Fileversion.class Fileversion H:\LCMS_Jars\client.jar x:\LCMSLatestLibrary\64bit\client.jar
pause
The same works if I cd into x:/LCMSLatestLibrary/Fileversion and execute the above line without -classpath flag. What am I missing?

You have to set as classpath the jar or directory containing your packages.
In your case (assuming the class Fileversion is in the default package) the command should be:
java -classpath x:/LCMSLatestLibrary/Fileversion Fileversion H:\LCMS_Jars\client.jar x:\LCMSLatestLibrary\64bit\client.jar

how to run a java class in another folder with jar file

i'd like to run a java class on other folder, i have a mysqlcon.jar on the current path and a PetsGUI.class on ./classes/
when i try to run it by doing
java -cp .:mysqlcon.jar -d classes/PetsGUI
i receive
classes/PetsGUI not found
if i move mysqlcon.jar on classes and type
java -cp .:mysqlcon.jar PetsGUI
on classes/ it runs, so the code is correct. what's the correct command to run it?

So you need the jar file, and the classes directory in the classpath:
java -cp ./classes:mysqlcon.jar PetsGUI
java doesn't expect a file path as argument. It expects the fully quelified name of a class. And that class is then searched on the classpath.

Ini4j classpath no class

i am want create jar of my project using cmd line.
I am using ini4j libs.
Everything compiles fine, but I do not know how to set the -cp to the library.
Compile:
javac -cp ".;lib/ini4j-0.5.2.jar;ini4j-0.5.2-jdk14.jar;lib/ini4j-0.5.2-jdk14.jar" gui_Frame/*.java
Create jar:
echo Main-class: gui_Frame/MainApp > manifest.txt
jar cvfm GVE.jar manifest.txt gui_Frame/*
But, if i want start java -jar GVE.jar i get following error:
Java.lang.NoClassDefFoundError: org/ini4j/wini
What am I doing wrong ?

You must specify the same classpath when running java as you did when compiling.
Or bundle all the necessary class files in one JAR.
==EDIT==
Try this:
java -cp "GVE.jar;.;lib/ini4j-0.5.2.jar" gui_Frame.MainApp

Run jar file from unix command prompt (ERROR)

I have a java project that has 10 .java files. A1.java, A2.java......A9.java and Main.java.
The project contains a package grand.big.medium.small and all the .java files are inside this package.
I have compiled and created an executable jar file for the project using:
javac grand/big/medium/small/*.java
to run the project I used the command
java -cp . grand/big/medium/small/Main
to create the jar I used the command
jar -cvmf manifest.txt MyJAR.jar *.class
I want to run the jar file from command prompt and I am using the commad
java -cp . -jar grand/big/medium/small/MyJAR.jar
and I getting an error:
Error: Could not find or load main class Main
please can anyone tell me why I am getting this error?

Run as:
java -cp . -jar grand/big/medium/small/MyJAR.jar grand.big.medium.small.Main
Assuming you have grand as a directory within current directory and directory hierarchy follows.

How to run Java program in command prompt

I created a Java project to call a Web service.
It has one Main java file and another class file.
I have used some jar files for HTTP client.
In Eclipse it runs fine.
I need to run the Java program in command prompt by passing some arguments.
In command prompt I went to src folder containing main java and sub class java file and gave the following command
javac mainjava.java
I'm getting following error
mainjava.java:14: cannot find symbol
symbol : class SubClass
here SubClass is my another java class file used to call the web service.
How to run the program by passing arguments?

javac is the Java compiler. java is the JVM and what you use to execute a Java program. You do not execute .java files, they are just source files.
Presumably there is .jar somewhere (or a directory containing .class files) that is the product of building it in Eclipse:
java/src/com/mypackage/Main.java
java/classes/com/mypackage/Main.class
java/lib/mypackage.jar
From directory java execute:
java -cp lib/mypackage.jar Main arg1 arg2

A very general command prompt how to for java is
javac mainjava.java
java mainjava
You'll very often see people doing
javac *.java
java mainjava
As for the subclass problem that's probably occurring because a path is missing from your class path, the -c flag I believe is used to set that.

You can use javac *.java command to compile all you java sources. Also you should learn a little about classpath because it seems that you should set appropriate classpath for succesful compilation (because your IDE use some libraries for building WebService clients). Also I can recommend you to check wich command your IDE use to build your project.

All you need to do is:
Build the mainjava class using the class path if any (optional)
javac *.java [ -cp "wb.jar;"]
Create Manifest.txt file with content is:
Main-Class: mainjava
Package the jar file for mainjava class
jar cfm mainjava.jar Manifest.txt *.class
Then you can run this .jar file from cmd with class path (optional) and put arguments for it.
java [-cp "wb.jar;"] mainjava arg0 arg1
HTH.

javac only compiles the code. You need to use java command to run the code. The error is because your classpath doesn't contain the class Subclass iwhen you tried to compile it. you need to add them with the -cp variable in javac command
java -cp classpath-entries mainjava arg1 arg2 should run your code with 2 arguments