how can I import class of another package into my package [closed]

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Write a package called Company. Under this package create on开发者_JAVA技巧e other package called salary. This salary package creates two classes "income" and "expenditure". Income class contain Basic, DA and Hra...and "expenditure" contain food, cloth and home exp.

Create a class "Budget" in package company which uses above two classes and calculate savings of family..

My problem is i have used constructor in both the classes "Income" and "Expenditure"..

but there are some problem in Budget class while importing these two classes..

can you explain me how can I write the "Budget" class ??????? Thank you/!!!

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This is not 100% complete or even a good way to do it, but it might get you to think.

package company;

import company.salary.Income;
import company.salary.Expenditure;

public class Budget
{
    private List<Income> credits;
    private List<Expenditure> debits;

    // Other stuff here
    public Money calculateSavings()
    {
        Money savings = new Money();

        for (Income credit : credits)
        {
           savings.add(credit.getValue());
        }
        for (Expenditure debit : debuts)
        {
           savings.sub(debit.getValue());
        }

        return savings;
    }
}


package company.salary;

public class Income
{
    private Money value;

    public Money getValue() { return this.value; }
}

public class Expenditure
{
    private Money value;

    public Money getValue() { return this.value; }
}