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Member.java

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import java.util.ArrayList;

import java.util.List;

class Member {

private String memberId;

private String name;

private List<Book> borrowedBooks;

public Member(String memberId, String name) {

if (memberId.length() != 6) {

throw new IllegalArgumentException("Member ID must be exactly 6 characters long.");

}

this.memberId = memberId;

this.name = name;

this.borrowedBooks = new ArrayList<>();

}

public String getMemberId() {

return memberId;

}

public String getName() {

return name;

}

public void borrowBook(Book book) {

if (borrowedBooks.size() < 3 && book.isAvailable()) {

borrowedBooks.add(book);

book.borrow();

} else {

throw new IllegalStateException("Cannot borrow book: either limit reached or book not available.");

}

}

public void returnBook(Book book) {

if (borrowedBooks.contains(book)) {

borrowedBooks.remove(book);

book.returnBook();

} else {

throw new IllegalArgumentException("This book was not borrowed by the member.");

}

}

public void printMemberInfo() {

System.out.print("Member ID: " + memberId + ", Name: " + name + ", Borrowed Books: ");

if (borrowedBooks.isEmpty()) {

System.out.println("None");

} else {

for (Book book : borrowedBooks) {

System.out.print(book.getTitle() + " ");

}

System.out.println();

}

}

}