Compiler and packaging

Question

sorry but this seems a strange question,
first i created 2 compilation units one in the unnamed package and the other in a package called package1 as in the code below:
//compilation1.java
public class compilation1
     public static void main(String args[])
          compilation2 c = new compilation2();
//compilation2.java
package package1;
public class compilation2
public compilation2()
System.out.println("Hi 2!!!!");
i placed the 2 files together in the <<<same folder>>> and created a subdirectory called package1. the problem is that when i compile the compilation2.java source using the -d flag every thing will go fine but when i try to compile compilation1.java so both can be compiled at the same time, a strange error appears:
D:\delete>javac -verbose -d d:\delete compilation1.java
[parsing started compilation1.java]
[parsing completed 240ms]
compilation1.java:1: package package1 does not exist
import package1.*;
^
[loading c:\j2sdk1.4.0\jre\lib\rt.jar(java/lang/Object.class)]
[loading c:\j2sdk1.4.0\jre\lib\rt.jar(java/lang/String.class)]
[checking compilation1]
[loading .\compilation2.java]
[parsing started .\compilation2.java]
[parsing completed 0ms]
compilation1.java:6: cannot resolve symbol
symbol : constructor compilation2 ()
location: class compilation2
compilation2 c = new compilation2();
^
[checking package1.compilation2]
[loading c:\j2sdk1.4.0\jre\lib\rt.jar(java/lang/System.class)]
[loading c:\j2sdk1.4.0\jre\lib\rt.jar(java/io/PrintStream.class)]
[loading c:\j2sdk1.4.0\jre\lib\rt.jar(java/io/FilterOutputStream.class)]
[loading c:\j2sdk1.4.0\jre\lib\rt.jar(java/io/OutputStream.class)]
[total 4667ms]
2 errors
****Note: the first error concerning the package is due to that the package is empty and there is no problem in that but it is the second error, i think it is due to that the compiler first look to compilation2 in the unnamed package and it finds it but the code specify that the code must be in a package but my problem is that i don't know what is the relation between the constructor and that packages mismatch.
thanx very much for ur time,
John Vcitor.

Answer 1

The files need to be in a directory which reflects the package.
I would suggest using an IDE like NetBeans or Eclipse (both free) which handle these issues, including build, run , debug for you.