CODEWITHSUNDEEP
java
city
city

Reputation: 2154

when running the java program, report cannot find class

The file FactoryDemo.java is compiled successfully and in it there is the

package home.city.Desktop.factorydemo;

I compile it by using javac -d / FactoryDemo.java and nothing wrong is reported.

But when I try to run it by using java home.city.Desktop.factorydemo.FactoryDemo, it reports： 

Exception in thread "main" java.lang.NoClassDefFoundError: home/city/Desktop/factorydemo/FactoryDemo
Caused by: java.lang.ClassNotFoundException: home.city.Desktop.factorydemo.FactoryDemo
    at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: home.city.Desktop.factorydemo.FactoryDemo. Program will exit.

I have tried many times but I could not find the solution to the problem. Thanks for your help in advance.

Upvotes: 1

Views: 135

Answers (2)

Ahmet Karakaya
Ahmet Karakaya

Reputation: 10147

FactoryDemo Class is created under root directory, you should type following command ( . instead of /)

javac -d . FactoryDemo.java

It creates home.city.Desktop.factorydemo directories starting from current directory.

If you want class created under root directory. You must type following command to execute.

java -classpath / home.city.Desktop.factorydemo.FactoryDemo

Upvotes: 1

mprivat
mprivat

Reputation: 21912

Your compiled class must be in a directory called: home/city/Desktop/factorydemo

On Unix, just run this: mkdir -p home/city/Desktop/factorydemo; mv FactoryDemo.class home/city/Desktop/factorydemo/

For best practice, simply move your Java source file in that folder too so the compiler outputs the file to the right spot.

Upvotes: 1

Related Questions