Thread: How to add to a string format from another class

I have 2 classes, the first class (person) has a string format and in the second one (Staff) i want to add some more variables to that string, how do i add to the string format?

Class Person, this is the first class with the most information

 
 
 
public String toString()
{
    String str = String.format("\nName:         " + firstName + " " + lastName +
                               "\nAddress:      " + address1 + 
                               "\n              " + address2 +
                               "\n              " + city + ", " + state + "  " + zipCode +
                               "\nPhone:        " + phoneNumber +
                               "\nEmail         " + email);
 
    return str;
}

Class Staff had more to it

public String String()
{
    String str = String.format("\nID            " + idNumber +
                               "\nSalary        " + salary +
                               "\nDepartment    " + department);
    return str;
}

Heres the class that gives information and runs it

Person dave = new Person("Dave", "Hill", "Buttercup Ln", "", "Little Rock", "Arkansas", 67575, 555555, "dave@yahoo.com");
 
Staff hank = new Staff("Hank", "Green", "57 Baker St", "", "Denver", "Colorado", 72120, 634839288, "hank@email.com", 2727, 10000.0, "work");
 
System.out.println(john);
 
System.out.println(hank);

When it runs it prints out:

Name: John Fox
Address: Lane
null
Little Rock, Arkansas 63638
Phone: 667733883
Email john@email.com

Name: Hank Green
Address: 57 Baker St
null
Denver, Colorado 72120
Phone: 634839288
Email hank@email.com

It prints exactly how i want but I want the second part to include the id number, salary, and department.