improvements doneClass Naming: Changed the class name to Fine for cl…

…arity.

Precision and Scale: Correctly defined precision = 10 and scale = 2 in the @column annotation for amount to match your documentation.
Javadoc Comments: Added detailed Javadoc comments for fields and methods, explaining the purpose and parameters.
toString() Method: Added a toString() method for convenient debugging and logging.
fineId Column Definition: Set updatable = false for fineId as it should be immutable once generated.

src/main/java/com/libraryman_api/fine/Fines.java

@@ -4,54 +4,99 @@
 
 import java.math.BigDecimal;
 
+/**
+ * Represents a fine in the Library Management System.
+ * Each fine has an amount, a payment status, and a unique identifier.
+ */
 @Entity
-public class Fines {
+public class Fine {
+
     @Id
-    @GeneratedValue(strategy = GenerationType.SEQUENCE,
-            generator = "fine_id_generator")
-    @SequenceGenerator(name = "fine_id_generator",
-            sequenceName = "fine_id_sequence",
-            allocationSize = 1)
-    @Column(name = "fine_id")
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "fine_id_generator")
+    @SequenceGenerator(name = "fine_id_generator", sequenceName = "fine_id_sequence", allocationSize = 1)
+    @Column(name = "fine_id", updatable = false, nullable = false)
     private int fineId;
 
     /**
-     * precision = 10 means the total number of digits (including decimal places) is 10.
-     * scale = 2 means the number of decimal places is 2.
-     *
-     * @Column(nullable = false, precision = 10, scale = 2)
+     * The amount of the fine with a precision of 10 and a scale of 2.
+     * Precision = 10 means the total number of digits (including decimal places) is 10.
+     * Scale = 2 means the number of decimal places is 2.
      */
-    @Column(nullable = false, scale = 2)
+    @Column(nullable = false, precision = 10, scale = 2)
     private BigDecimal amount;
 
+    /**
+     * Indicates whether the fine has been paid.
+     */
     @Column(nullable = false)
     private boolean paid = false;
 
-    public Fines() {
+    // Default constructor for JPA
+    public Fine() {
     }
 
-    public Fines(BigDecimal amount, boolean paid) {
+    // Constructor with fields
+    public Fine(BigDecimal amount, boolean paid) {
         this.amount = amount;
         this.paid = paid;
     }
 
+    /**
+     * Gets the unique ID of the fine.
+     *
+     * @return the unique fine ID
+     */
+    public int getFineId() {
+        return fineId;
+    }
+
+    /**
+     * Gets the amount of the fine.
+     *
+     * @return the amount of the fine
+     */
     public BigDecimal getAmount() {
         return amount;
     }
 
+    /**
+     * Sets the amount of the fine.
+     *
+     * @param amount the amount to set
+     */
     public void setAmount(BigDecimal amount) {
         this.amount = amount;
     }
 
+    /**
+     * Checks if the fine has been paid.
+     *
+     * @return true if the fine is paid, false otherwise
+     */
     public boolean isPaid() {
         return paid;
     }
 
+    /**
+     * Sets the payment status of the fine.
+     *
+     * @param paid true if the fine is paid, false otherwise
+     */
     public void setPaid(boolean paid) {
         this.paid = paid;
     }
 
-    public int getFineId() {
-        return fineId;
+    /**
+     * Provides a string representation of the Fine object.
+     *
+     * @return a string containing the fine details
+     */
+    @Override
+    public String toString() {
+        return "Fine{" +
+                "fineId=" + fineId +
+                ", amount=" + amount +
+                ", paid=" + paid +
+                '}';
     }
 }