Launching single file source code program - "error: class found on application class path"
Jaikiran Pai
jai.forums2013 at gmail.com
Sun Jun 17 10:56:34 UTC 2018
Consider this very simple class:
public class A {
public static void main(final String[] args) throws Exception {
System.out.println("Passed");
}
}
I built the latest JDK from source and used the "launch single file
source program" feature as follows:
> cd /tmp/foo-bar
(this dir contains just A.java file)
> java A.java
The output is as follows (as expected):
Passed
Then I went ahead and did an explicit compilation of this Java file:
> javac A.java
The /tmp/foo-bar directory now consists of A.class and A.java. I then
went ahead and (tried) to launch the A.java using the new feature as
previously:
> java A.java
I now get this error message:
error: class found on application class path: A
1. That error message isn't clear about what the problem is. I guess
it's trying to convey that there's already a compiled class for the same
source class, in the application classpath?
2. Why is this an error? Is it intentional?
-Jaikiran
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