I'm able to compile and run a simple hello world program from command line with
javac hello.java
java hello
however, if I had a package statement at the top package com.mypackage.myclass and try the same I get
Error: Could not find or load main class Reflection
What is exactly happening? And how do I fix it? Thanks.
UPDATE: Thanks everyone. I already had created the directory structure manually. In order for this to work I have to run java com.mypackage.myclass from the root directory, otherwise it will not work. Still don't understand the underlying mechanism. What is exactly happening?
CodePudding user response：
If you have a java class like com.example.test.Main then the compiled class should be in a folder com\example\test and the class file name Main.class
You could manually do it, but compiler has a switch -d <target folder> which will create the folder structure for you.
javac -d . Main.java
In the above command the target folder is the current folder where you have the Java source file.
Once compiled you must use fully qualified name of the class to execute from the same folder you compiled the java file.
java com.example.test.Main