Help ! Package and ArrayStoreException

Question

Please help. I have a problem with a package program. I am creating a package called pack containing 2 classes, Expenses with m_expense( ), Expenses have variables to store food, lodging and clothing and class Income with m_Income( ), Income have variable to store salary, rent and allowances. Then i create a class debit to display the variable using public static void main (String args[ ] ); and it in Expenses.m_expense( );
Income.m_income( ) to display the variable contents;
I should also calculate the savings. The compile error is i cannot access Expenses.m_expense and also Income.m_income. I don't know what is wrong. And where should i calculate the savings - in debit.java or in pack.java.
Another thing is I'm supposed to create a program to create ArrayStoreException but i don't understand it. Can anyone please give an example and explain.
All advice is appreciated. Thank you!

Answer 1

You see, now I'm a little confused. What lecturer had taught me is unapplicable and is different from the other tutorials that i refered to.
I create a new dir named pack. In it there is a file named pack containing the 2 classes.An example code he gave is something like below :
package pack;
public class Expense
public static void m_expense()
float food = 150.00
System.out.println("Food is" + food);
public class Income
public static void m_income()
float salary = 575.00
System.out.println("Salary is " + salary);
Then create a new file outside the directory:
import pack.*;
class debit
public static void main(String args[])
Expense.m_expense();
Income.m_income();
What do you think ? Pls give some comments and assist to rectify the mistake. I will try the earlier suggestions you gave to me. Thanks a lot.