done

Answers/Library/.gitignore

@@ -0,0 +1,38 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

Answers/Library/pom.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>Library</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

Answers/Library/src/main/java/Admin.java

@@ -0,0 +1,33 @@
+import java.io.Serial;
+import java.io.Serializable;
+import java.util.UUID;
+
+public class Admin extends Person implements Serializable {
+    @Serial
+    private static final long serialVersionUID = 1L;
+    private String password;
+    static int currentID = 0;
+
+    public Admin(String fullName, String phoneNumber, String password) {
+        super(fullName, phoneNumber);
+        currentID ++;
+        this.ID = String.valueOf(currentID);
+        this.password = password;
+    }
+    public String getPassword(){
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    @Override
+    public String toString() {
+        return "Admin{" +
+                "fullName='" + getFullName() + '\'' +
+                ", ID='" + getID() + '\'' +
+                ", phoneNumber='" + getPhoneNumber() + '\'' +
+                '}';
+    }
+}

Answers/Library/src/main/java/Book.java

@@ -0,0 +1,69 @@
+import java.io.Serial;
+import java.util.UUID;
+import java.io.Serializable;
+
+public class Book implements Serializable {
+    @Serial
+    private static final long serialVersionUID = 1L;
+    private String bookID;
+    private String title;
+    private String author;
+    private boolean availability;
+    private String description;
+    static int currentID = 0;
+
+    public Book(String title, String author, String description) {
+        currentID ++;
+        this.bookID = String.valueOf(currentID);
+        this.title = title;
+        this.author = author;
+        this.description = description;
+        this.availability = true;
+    }
+
+    public String getBookID() {
+        return bookID;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public boolean isAvailability() {
+        return availability;
+    }
+
+    public void setAvailability(boolean availability) {
+        this.availability = availability;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+    @Override
+    public String toString() {
+        return "Book{" +
+                "bookID='" + getBookID() + '\'' +
+                ", title='" + getTitle() + '\'' +
+                ", author='" + getAuthor() + '\'' +
+                ", availability=" + isAvailability() +
+                ", description='" + getDescription() + '\'' +
+                '}';
+    }
+}