Java -cp problem cannot find main class

[rim wassim]

hello guys im new on this website and also newbie with java i got a problem using this command java -cp ".;C:\temp\someOtherLocation;c:\temp\myJar.jar" myPackage.MyClass)    ---> {"that's from java 8 certification book"}
the command that i use is : java -cp ".;C:\Users\wassim-rim\Desktop\Test2Java" packageb.Test2B.java
i want to specify the location of classA  on the file Test2Java  located on desktop so it can be reachable by class Test2B.java  but i don't know  to solve the problem(impossible to find or load the main class packageb.Test2B.java .

im waiting your response thank you in advance (sry for my bad english ) .

[Norm Radder]

command that i use is : java -cp ".;C:\Users\wassim-rim\Desktop\Test2Java" packageb.Test2B.java  

That looks like a source file name (ends with .java) not the name of the class file.
If the class file is in the packageb folder and that folder is in the current folder where the java program is executed, the java program should find it.

Please copy the contents of the command prompt window:
Click on Icon in upper left corner
Select Edit
Select 'Select All' - The selection will show
Click in upper left again
Select Edit and click 'Copy'

Paste here.

[Campbell Ritchie]

Welcome to the Ranch

If you have included the .java extension, then you have done something different from the instruction the book gave you. The example shows the classpath being set without an extension. You were right to add .; to that classpath. This part of the Java™ Tutorials might help.
Why are you keeping your Java® work on your desktop? All you will achieve is filling it with hundreds of old XYZ.java and XYZ.class files. I suggest you do this at the command line:-mkdir java cd java...or whatever other name you want for that folder. Next time you only need line 2.

[Liutauras Vilda]

rim wassim wrote:hello guys im new on this website

A warm welcome to the Ranch

rim wassim wrote:that's from java 8 certification book

Please let us know, which book is that? Thank you.

Well, the idea of this exercise is, that you really need to go through the struggle in order to understand yourself how things work. However, the mistakes you introduced are fundamental and might be difficult to debug, because this exercise I don't think explains these parts where you were mistaken.

rim wassim wrote:i use is : java -cp ".;C:\Users\wassim-rim\Desktop\Test2Java" packageb.Test2B.java

1. When you specify classpath, you need to specify files with their extensions.
2. When you specify the class you want to execute (with java command), you don't specify file (class's) extension.
3. When you compile classes, you need to specify extensions of the files in the classpath(s) as well as for the classes you are about to compile.