How can we set the classpath with Java command?

How can we set the classpath with Java command?


  1. Select Start.
  2. Go to the Control Panel.
  3. Select System and Security.
  4. Select Advanced System settings.
  5. Click on Environment Variables.
  6. Click on New under System Variables.
  7. Add CLASSPATH as variable name and path of files as a variable value.
  8. Select OK.

How do you run a Java application on the command-line and set the classpath with multiple jars?

5 ways to add multiple JARs in Classpath

  1. Include the JAR name in the CLASSPATH environment variable.
  2. Include the name of the JAR file in -classpath command-line option.
  3. Include the jar name in the Class-Path option in the manifest.
  4. Use Java 6 wildcard option to include multiple JAR.

How do you set classpath variables in UNIX?

To set the CLASSPATH permanently, set an environment variable:

  1. On the Windows Control Panel, click System.
  2. Click Advanced or Advanced Systems Settings.
  3. Click Environment Variables.
  4. Under User variables, click New.
  5. In the Variable name box, type CLASSPATH .
  6. In the Variable value box, type the path to the Vertica JDBC .

Where is Java path set in Linux?

Your answer

  1. find /usr/lib/jvm/java-1.x.x-openjdk.
  2. vim /etc/profile. Prepend sudo if logged in as not-privileged user, ie. sudo vim.
  3. Press ‘i’ to get in insert mode.
  4. add: export JAVA_HOME=”path that you found” export PATH=$JAVA_HOME/bin:$PATH.
  5. Reboot your system, and voila.

How do you set your classpath to the location where your class loader is present?

Put a dot (.) in the new setting if you want to include the current directory in the search path. If CLASSPATH finds a class file which is present in the current directory, then it will load the class and use it, irrespective of the same name class presents in another directory which is also included in the CLASSPATH.

How do I permanently set classpath in Linux?

CLASSPATH (for macOS/Ubuntu)

  1. To set the CLASSPATH for the current session, issue this command: export CLASSPATH=.:/usr/local/tomcat/bin/servlet-api.jar.
  2. To set the CLASSPATH permanently, place the above export command in the bash shell initialization script ( .

Is it necessary to set classpath in Java?

You need to set the CLASSPATH if: You need to load a class that is not present in the current directory or any sub-directories. You need to load a class that is not in a location specified by the extensions mechanism.

Is it mandatory to set classpath in Java?

We don’t need to set PATH and CLASSPATH to compile and run java program while using IDE like Eclipse. These environment variables are required to compile and run java program using CMD. Compiling the program- I have java program file Demo. java stored at location D:\Programs\Classes .

Where is Java PATH set in Linux?

How do I change Java environment variables in Linux?


  1. Download or save the appropriate JDK version for Linux.
  2. Extract the compressed file to the required location.
  3. Set JAVA_HOME using the syntax export JAVA_HOME= path to JDK .
  4. Set PATH using the syntax export PATH=${PATH}: path to the JDK bin .
  5. Verify the settings using the following commands: