Displaying content of two classes in Application

Question

Hello,
I have 2 classes, Staff and Student, each having unique characteristics that I simply want to display that information in my third class, Application using the display() method which I have coded for each class -- Staff and Student. However, the computer's not recognizing that method, and at this point, I'm not sure what I'm missing. I thought having all 3 classes with the same package name would do the trick. Any help is appreciated.
package testingOne
public class Staff {
     Staff staff = new Staff("Robert Findle", "123 Poplar Road", "Social Studies Department", 666);
     public Staff (String aName, String anAddress, String aDepartment, int anEmployeeNumber)
          aName = theName;
          anAddress = theAddress;
          aDepartment = theDepartment;
          anEmployeeNumber = theEmployeeNumber;
     public void display()
          System.out.println("Staff: " + staff);
     private String theName;
     private String theAddress;
     private String theDepartment;
     private int theEmployeeNumber;
}//class:Staff
package testingOne
public class Student {
     public Student(String aName, String anAddress, String aCourseName, int aMatriculationNumber)
          aName = theName;
          anAddress = theAddress;
          aCourseName = theCourseName;
          aMatriculationNumber = theMatriculationNumber;
     Student student = new Student("Ken Smith", "456 Strathmeade Lane", "Art 101", 465);
     public void display()
          System.out.println("Student: " + student);
     private String theName;
     private String theAddress;
     private String theCourseName;
     private int theMatriculationNumber;
}//class Student
package testingOne;
public class Application {
     staff.display();
     student.display();
}//class:Application

Answer 1

A few pointers
public class Staff {
    Staff staff = new Staff(...);Creating an object of the same class within the class is generally a bad idea.
public void display()Where you told to create the display method? Because it would be better if you wrote your own toString method then you could simply do this
System.out.println(staff);If this is your main driver class
public class Application {
     staff.display();
     student.display();
}//class:ApplicationWhere is your main method? That code should be inside a method not just floating about there. Also, you have not declared the staff or student objects in that code so you cannot access them. This goes back to my first point.