Unlike instance variables (which are unique to each student, like name or grade ), a ArrayList is shared across all instances of the Student class. This allows the program to maintain a single, comprehensive "Teacher Class List" that grows as students are added.
private static ArrayList classList = new ArrayList (); Use code with caution. Copied to clipboard 2. Update the Constructor 7.2.8 Teacher Class List
import java.util.ArrayList; public class Student private String name; private int grade; // The static list that tracks all student objects private static ArrayList classList = new ArrayList (); Use code with caution. 2. The Constructor Logic Unlike instance variables (which are unique to each
: When you write Student alan = new Student("Alan", 11); , the constructor automatically triggers the addition to your static list. Copied to clipboard 2
itself, not to individual objects. All student objects will share this one list.
Here’s a sample text for a “7.2.8 Teacher Class List” — likely a classroom roster or grade sheet for a teacher: