What needs to be done to make the Person class immutable?

To make the Person class immutable in Java, you need to:

• Make the class final so it cannot be subclassed or have its behavior changed.
• Declare all class fields as private final.
• Initialize all fields through the constructor.
• Do not provide setters.
• If the fields are mutable objects (e.g., collections or other classes), create copies when assigning and return copies in getters to prevent external modification of internal state.

Example:

public final class Person {
    private final String name;
    private final int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}