When you write a simple Java Application in Eclipse in automatically compiles those files and stores them in the bin/ folder of the root folder of the project.
Now if I navigate to the /bin folder and to the folder that contains the .class file I want to run via the java command below I am getting the following error - :
java A Error: Could not find or load main class A
Class A:
package assurance;
public class A {
public static void main(String[] args) {
System.out.println("Hello World");
}
}
While the class A has a main method and runs fine when I right click on the file and do a Run As Java Application. But it does not run from the command like java command.
Why is this happening ?
Update:
Tried with the following commands-:
java -cp "A.class" assurance.A
java -cp "A" assurance.A
java -cp "*" assurance.A
It works in Eclipse, because Eclipse just runs it with correct -cp and correct command :)
Run your code with the following command:
java -cp "./" assurance.A ("" for some odd cmd interpreters like Windows XP)
it is important that the command is run from the "default package" directory (top-level package directory).
Java interprets package name (assurance) as directory path to the class file. Imagine if it replaces . with / and adds .class extension
(assurance.A => ./assurance/A.class)
More details here: http://docs.oracle.com/javase/7/docs/technotes/tools/windows/classpath.html