Classes using each other in packages

I've almost understood package's mechanic. But when I try to use class which is defined in another file in a package I've got an error :/. I have CLASSPATH set to .;.
Here is sample code:
File Main.java
package testpackage;
public class Main {
       public static void main(String args[]) {
                JLogin login = new JLogin();
                login.setSize(250,100);
                login.setVisible(true);
   }File JLogin.java starts with package testpackage; too and contains public class JLogin.
When I dont use package (only default packages), everything is ok.
But when I move Main.java to upper directory and write import testpackage.JLogin; instead of package word everything is ok.
Thx in advance

Which files are in which directories?
What's your classpath?
What command are you using to compile/run?
What is the error you're getting?

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But, if both the classes have each others' reference, how does compiler resolve this? Because, even in that case both classes get compiled
Regards,
Amit

Lets say that compilation is done in 2 steps.
The first step is done for all files first.
Then the second step is done for all files.
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they are referring to each other they are easily resolved.
This is different from runtime resolution.

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I've got a problem....i have a program with two classes, and each class needs access to methods stored in the other class.
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You have infinite recursion. A method or constructor is calling itself, or is calling another method or constructor that eventually ends up calling the first one.
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Why not just use an interface?
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Hi Felicia,
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Hi,
I have a question. How to make all classes in a same package visible to each other? For example, I have two classes below, T1.java and T2.java:
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Make sure your classpath env variable is set correctly!
to compile these classes you should have something like:
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[http://www.swingwiki.org/best:use_worker_thread_for_long_operations]
[http://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Java/Chapter10/concurrencyTools.html]
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Hi Experts,
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With BestRegards,
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Hi ThippaReddy,
see this sample code
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Micheal
Vasu Anna Regional Feeling a???? Just Kidding
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Edited by: micheal willis on Jul 27, 2009 5:50 PM

How to convert the class in the one package to same class in the other pack

How to convert the class in the one package to same class in the other package
example:
BeanDTO.java
package cho3.hello.bean;
public class BeanDTO {
private String name;
private int age;
* @return
public int getAge() {
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* @return
public String getName() {
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* @param i
public void setAge(int i) {
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* @param string
public void setName(String string) {
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BeanDTO.java in other package
package ch03.hello;
public class BeanDTO {
private String name;
private int age;
* @return
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* @return
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public void setAge(int i) {
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My converter lass lokks like
public class BeanUtilTest {
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But its giving class cast exception. Please help on this..

Do you mean "two different layers" as in separate JVMs or "two different layers" as in functional areas running within the same JVM.
In either case, if the first class is actually semantically and functionally the same as the second (and they are always intended to be the same) then import and and use the first class in place of the second. That's beyond any question of how to get the data of the first into the second if and when you need to.
Once you make the breakthrough and use one class instead of two I'd guess that almost solves your problem. But if you want to describe your architecture a little that would help others pin down want you're trying to do.

2 files in same package and depends each other need import package??

test1.java and test2.java are in the same package mypackage,
and test1.java will call methods in test2.java, does it mean
test1.java needs to import mypackage.test2;
i.e.
//test1.java
package mypackage;
import mypackage.test2;
class test1
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no, once classes are in the same packages they are picked up ie tc1 is in tc_package and tc2 is also in tc_package, tc1 need not import tc_package.tc2 to use tc2 methods.
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package com.yawmark.jdc;
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}And...
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Classes using each other in packages

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