Package creation problems

Question

(This is a question relating to a homework question... so not too much help please!)
I've created (what I hope is) a working package, and it compiles fine with no errors. I've then created a test program that calls the package. But, when I try to compile the test program it returns with the error (package does not exist).
Here are my two .java files.
The Package:
package uk.ac.cf.cs.scm2lem.PoundOunce;
class PoundOunce {
     int lbOne, ozOne, lbTwo, ozTwo, ozOneTotal, ozTwoTotal, ozFinalTotal, lbResult, ozResult;
     public void main(String args[]) {
          lbOne = Integer.parseInt(args[0]);
          ozOne = Integer.parseInt(args[1]);
          lbTwo = Integer.parseInt(args[3]);
          ozTwo = Integer.parseInt(args[4]);
          ozOneTotal = (lbOne * 16) + ozOne;
          ozTwoTotal = (lbTwo * 16) + ozTwo;
          if (args[2] == "a") {
               addition(ozOneTotal, ozTwoTotal);
          else if (args[2] == "s") {
               subtraction(ozOneTotal, ozTwoTotal);
          else if (args[2] == "m") {
               multiplication(ozOneTotal, ozTwoTotal);
          else division(ozOneTotal, ozTwoTotal);
          lbResult = ozFinalTotal / 16;
          ozResult = ozFinalTotal % 16;
          System.out.println("Answer: " + lbResult + "lbs and " + ozResult + "oz");
     int addition(int ozOneTotal, int ozTwoTotal) {
          ozFinalTotal = ozOneTotal + ozTwoTotal;
          return ozFinalTotal;
     int subtraction(int ozOneTotal, int ozTwoTotal) {
          ozFinalTotal = ozOneTotal - ozTwoTotal;
          return ozFinalTotal;
     int multiplication(int ozOneTotal, int ozTwoTotal) {
          ozFinalTotal = ozOneTotal * ozTwoTotal;
          return ozFinalTotal;
     int division(int ozOneTotal, int ozTwoTotal) {
          ozFinalTotal = ozOneTotal / ozTwoTotal;
          return ozFinalTotal;
}Here is my test program:
import uk.ac.cf.cs.scm2lem.PoundOunce;
class PoundOunceTest {
     public static void main(String args) {
          PoundOunce test = new PoundOunce();
}Now, I've been told to compile my package by using the command javac -d PackageName.java and this just doesn't work. I've compiled it into a .class file and also put this into a .jar file (Don't ask why, because I don't have a clue!) and it still comes with errors.
How do I make my package available to my test file? I'm truly stumped!
Thanks for ANY help.
fakelvis

Answer 1

I have discard the package and change the sentence :
import PoundOunce;
I thimk that is very simple the solution :
class PoundOunceTest:
public class PoundOunceTest{
private PoundOunce t;
public static void main ( String[] args )
PoundOunce test = new PoundOunce();
and the PoundOunce.java as follow :
class PoundOunce {
int lbOne, ozOne, lbTwo, ozTwo, ozOneTotal, ozTwoTotal, ozFinalTotal, lbResult, ozResult;
public void main(String args[]) {
lbOne = Integer.parseInt(args[0]);
ozOne = Integer.parseInt(args[1]);
lbTwo = Integer.parseInt(args[3]);
ozTwo = Integer.parseInt(args[4]);
ozOneTotal = (lbOne * 16) + ozOne;
ozTwoTotal = (lbTwo * 16) + ozTwo;
if (args[2] == "a") {
addition(ozOneTotal, ozTwoTotal);
else if (args[2] == "s") {
subtraction(ozOneTotal, ozTwoTotal);
else if (args[2] == "m") {
multiplication(ozOneTotal, ozTwoTotal);
else division(ozOneTotal, ozTwoTotal);
lbResult = ozFinalTotal / 16;
ozResult = ozFinalTotal % 16;
System.out.println("Answer: " + lbResult + "lbs and " + ozResult + "oz");
int addition(int ozOneTotal, int ozTwoTotal) {
ozFinalTotal = ozOneTotal + ozTwoTotal;
return ozFinalTotal;
int subtraction(int ozOneTotal, int ozTwoTotal) {
ozFinalTotal = ozOneTotal - ozTwoTotal;
return ozFinalTotal;
int multiplication(int ozOneTotal, int ozTwoTotal) {
ozFinalTotal = ozOneTotal * ozTwoTotal;
return ozFinalTotal;
int division(int ozOneTotal, int ozTwoTotal) {
ozFinalTotal = ozOneTotal / ozTwoTotal;
return ozFinalTotal;
You have seen that no more chandes have been made . Well now you can :
javac PoundOunce.java
javac PoundOunceTest.java
and continue :
java PoundOunceTest
but you have ommited "static" in tne
public void main ( String[] args )
I think that it's wrong
Miguel