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I have a .java file which i compiled in a package named "Mypack",using command line as follows

javac -d . file_name.java     // The "." specifies the current working directory which was the desktop

so it creates a folder on the desktop named "Mypack"(The package name), in the folder the .class file for my program is placed.Now i did the following

java -classpath "C:\Users\LoRd CuRZon\Desktop\Mypack" file_name     //  Error Could not find or load main method

Even if i go into the directory "Mypack" and launch command prompt from that directory and try to run the program i still get the same error.

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  • What error do you get? Commented Nov 29, 2015 at 10:41
  • have you added any package statement into source file , then please provide me. Commented Nov 29, 2015 at 10:42
  • is it a simple java file or it contains main method? Commented Nov 29, 2015 at 10:42
  • This works but i still don't understand why cant i just go to the directory of the file and write java file_name ? Commented Nov 29, 2015 at 12:35

3 Answers 3

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run it as likewise from Desktop,

c:/.../Desktop> java Mypack.file_name
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java command requires fully qualified name .

so from desktop run java Mypack.classname

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If you have this error:

 Error Could not find or load main method

That means you don't write a main method in you code try to write it. But befor to do those steps: Fo compiling a programme do this:

java Mypack.file_name

To run it do like this:

java Mypack.classname
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