error: package org.apache.commons.net.ntp does not exist

Question

I downloaded commons-net-3.0.1-bin.zip file and extracted it to java lib folder. I have set the path to java bin folder and classpath=.;C:\\Program Files\\Java\\jdk1.7.0_01\\lib\\commons-net-3.0.1 .

commons-net-3.0.1 folder has commons-net-3.0.1 jar , commons-net-3.0.1-sources.jar and commons-net-examples-3.0.1.jar files.

In my program I imported org.apache.commons.net.ntp.* package, and it gave the "package doesn't exist" error.

Answer 1

Just adding the directory containing the JAR files isn't enough. Add the specific JAR file to the classpath instead, eg

classpath=.;C:\Program Files\Java\jdk1.7.0_01\lib\commons-net-3.0.1\commons-net-3.0.1.jar

Alternatively, use a classpath wildcard to add all JARs in a given directory. See How to use a wildcard in the classpath to add multiple jars?

Answer 2

• check that package org.apache.commons.net.ntp.* presents in jar file
• make sure that the jar file is in the class path of an application How to set Classpath