import and package compile errors

[Linda Pan]

I am trying to compile Bruce Eckel's code in "thinking in Java". I am using Win98 Jdk 1.3. I have a set-up of all my source code in c:\works\java and my classes in c:\works\classes. I did a sample package and import and works fine.

Now trying to compile the following code in "c:\works\java" :

  
//: c04:Leaf.java
// Simple use of the "this" keyword.
import com.bruceeckel.simpletest.*;
 
public class Leaf {
  static Test monitor = new Test();
  int i = 0;
  Leaf increment() {
    i++;
    return this;
  }
  void print() {
    System.out.println("i = " + i);
  }
  public static void main(String[] args) {
    Leaf x = new Leaf();
    x.increment().increment().increment().print();
    monitor.expect(new String[] {
      "i = 3"
    });
  }
} ///:~

And in "c:\works\java\com\bruceeckel\Simpletest\", there are a bunch of java files.

I enter c:\works\java> javac -d c:\works\classes Leaf.java
I'm getting the following error:

Leaf.java:3: package com.bruceeckel.simpletest does not exist
import com.bruceeckel.simpletest.*;
^
Leaf.java:7: cannot resolve symbol
symbol : class Test
location: class Leaf
static Test monitor = new Test();
^
Leaf.java:7: cannot resolve symbol
symbol : class Test
location: class Leaf
static Test monitor = new Test();
^
3 errors

[Sandeep Jindal]

Hi Linda,

The simple problem is that you did not put the code of Bruce Eckel in class path.

Just put the base directory of the compiled clsses in classpath.
e.g if your Test.class and other BruceEkel's clases are in this package
C:\works\java\com\bruceeckel\Simpletest\Test.class

Just add c:\works\java in your classpath and it will start working.

Regards
Sandeep

[Daniel Mayer]

Take a look at the case of the simpletest package. Your import declaration is lowercase, your directory uppercase. For the compiler, they are not the same.

[Sandeep Jindal]

Originally posted by Daniel Mayer:
Take a look at the case of the simpletest package. Your import declaration is lowercase, your directory uppercase. For the compiler, they are not the same.

I think there is no case sentivity of folder in windows. Rite?

[Dirk Schreckmann]

I think there is no case sentivity of folder in windows. Rite?

The situation here is that Java is case sensitive. If you've access to a Windows machine, a good way to determine an answer to your question is to go ahead and try it. I just did, and the case of the folders must match that of the package names.

[Sandeep Jindal]

Hi Dirk,

Thanks for your reply.
But i have also tested a small program.
Let me explain what i have tested:

package pack1;
 
class Test1{
//void main and all that
}

This code is working very fine, when i put the Test1.java in a windows folder "pack1".

Now what i did is, i did not change any directory, just modified the first line of Test1.java from "package pack1 to package PacK1"

Now i tried compiling and runnung Test1, is runing very fine.

Regards
Sandeep Jindal

[Dirk Schreckmann]

When I try your experiment with Java version 1.5.0-rc and version 1.4.2_05 on Windows XP, it results in NoClassDefFoundError: pack1/Test1 (wrong name: PacK1/Test1) in both cases.