style:fmt

com/study/demo3/Library.java

@@ -1,42 +1,37 @@
 package com.study.demo3;
+
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.ArrayList;
 
 public class Library {
-   
-    private Map<String, Book> books;
 
-    public Library() {
-        this.books = new HashMap<>();
+  private Map<String, Book> books;
+
+  public Library() {
+    this.books = new HashMap<>();
+  }
+
+  public void addBook(Book b) {
+    String isbn = b.getIsbn();
+
+    if (books.containsKey(isbn)) {
+      System.out.println("The book already exists, adding it failed.");
+    } else {
+      books.put(isbn, b);
+      System.out.println("Book added successfully: " + b.getTitle());
     }
+  }
 
-   
-   
-    public void addBook(Book b) {
-        String isbn = b.getIsbn();
+  public List<Book> searchAvailableBooks() {
+    List<Book> availableBooks = new ArrayList<>();
 
-       
-        if (books.containsKey(isbn)) {
-            System.out.println("The book already exists, adding it failed.");
-        } else {
-            books.put(isbn, b);
-            System.out.println("Book added successfully: " + b.getTitle());
-        }
-    }
-
-   
-   
-    public List<Book> searchAvailableBooks() {
-        List<Book> availableBooks = new ArrayList<>();
-        
-       
-        for (Book book : books.values()) {
-            if (book.isAvailable()) {
-                availableBooks.add(book);
-            }
-        }
-        return availableBooks;
+    for (Book book : books.values()) {
+      if (book.isAvailable()) {
+        availableBooks.add(book);
+      }
     }
+    return availableBooks;
+  }
 }