:D

src/main/java/Book.java

@@ -1,3 +1,63 @@
 public class Book {
     //Book should contain name,author,year of publish and ISBN
+    private String name;
+    private String author;
+    private String year;
+    private String isbn;
+    private boolean avaliable = true;
+
+    public boolean isAvaliable() {
+        return avaliable;
+    }
+
+    public void setAvaliable(boolean avaliable) {
+        this.avaliable = avaliable;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public String getYear() {
+        return year;
+    }
+
+    public void setYear(String year) {
+        this.year = year;
+    }
+
+    public String getIsbn() {
+        return isbn;
+    }
+
+    public void setIsbn(String isbn) {
+        this.isbn = isbn;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{" +
+                "name='" + name + '\'' +
+                ", author='" + author + '\'' +
+                ", year='" + year + '\'' +
+                ", isbn='" + isbn + '\'' +
+                ", avaliable=" + avaliable +
+                '}';
+    }
+
+    public void changeStatus(){
+        this.avaliable = !this.avaliable;
+    }
 }

src/main/java/Librarian.java

@@ -1,10 +1,55 @@
+import java.util.Scanner;
+
 public class Librarian {
     /*
     * The librarian should have a username and a password
     * The librarian should be able to search users, librarians and books
-    * The librarian should be able to add\remove\update user add\remove\update_
-    _ librarian and add\remove\update book
+    * The librarian should be able to add,remove,update user add,remove,update_
+    _ librarian and add,remove,update book
      */
 
+    // Attributes
+    private String username;
+    private String password;
+
+    // Getter & Setter
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
 
+    public void changePassword(){
+        System.out.println("Enter Your Current Password: ");
+        Scanner myScanner = new Scanner(System.in);
+        String Pass = myScanner.nextLine();
+        if(Pass.equals(this.getPassword())){
+            System.out.println("Enter Your newest Password: ");
+            String newPass = myScanner.nextLine();
+            this.password = newPass;
+        }
+        else{
+            System.out.println("Wrong Password! " + "\n" + "Do You Want Try Again?!(Yes/No) : ");
+            String ansewr = myScanner.nextLine();
+            if(ansewr.equals("Yes") || ansewr.equals("yes"))
+                changePassword();
+        }
+    }
+    @Override
+    public String toString() {
+        return "Librarian{" +
+                "username='" + username + '\'' +
+                ", password='" + password + '\'' +
+                '}';
+    }
 }