docs: improve intercepting filter

intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/Client.java

@@ -27,6 +27,7 @@ package com.iluwatar.intercepting.filter;
 import java.awt.BorderLayout;
 import java.awt.GridLayout;
 import java.awt.event.ActionEvent;
+import java.io.Serial;
 import java.util.Arrays;
 import javax.swing.JButton;
 import javax.swing.JFrame;
@@ -49,6 +50,7 @@ import javax.swing.WindowConstants;
  */
 public class Client extends JFrame { // NOSONAR
 
+  @Serial
   private static final long serialVersionUID = 1L;
 
   private transient FilterManager filterManager;

intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/ContactFilter.java

@@ -37,8 +37,7 @@ public class ContactFilter extends AbstractFilter {
   public String execute(Order order) {
     var result = super.execute(order);
     var contactNumber = order.getContactNumber();
-    if (contactNumber == null || contactNumber.isEmpty()
-        || contactNumber.matches(".*[^\\d]+.*")
+    if (contactNumber == null || contactNumber.matches(".*[^\\d]+.*")
         || contactNumber.length() != 11) {
       return result + "Invalid contact number! ";
     } else {

intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/Order.java

@@ -24,9 +24,19 @@
  */
 package com.iluwatar.intercepting.filter;
 
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
+import lombok.Setter;
+
 /**
  * Order class carries the order data.
  */
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
 public class Order {
 
   private String name;
@@ -34,61 +44,4 @@ public class Order {
   private String address;
   private String depositNumber;
   private String orderItem;
-
-  public Order() {
-  }
-
-  /**
-   * Constructor.
-   */
-  public Order(
-      String name, String contactNumber, String address,
-      String depositNumber, String order
-  ) {
-    this.name = name;
-    this.contactNumber = contactNumber;
-    this.address = address;
-    this.depositNumber = depositNumber;
-    this.orderItem = order;
-  }
-
-  public String getName() {
-    return name;
-  }
-
-  public void setName(String name) {
-    this.name = name;
-  }
-
-  public String getContactNumber() {
-    return contactNumber;
-  }
-
-  public void setContactNumber(String contactNumber) {
-    this.contactNumber = contactNumber;
-  }
-
-  public String getAddress() {
-    return address;
-  }
-
-  public void setAddress(String address) {
-    this.address = address;
-  }
-
-  public String getDepositNumber() {
-    return depositNumber;
-  }
-
-  public void setDepositNumber(String depositNumber) {
-    this.depositNumber = depositNumber;
-  }
-
-  public String getOrderItem() {
-    return orderItem;
-  }
-
-  public void setOrderItem(String order) {
-    this.orderItem = order;
-  }
 }

intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/Target.java

@@ -28,6 +28,7 @@ import java.awt.BorderLayout;
 import java.awt.Dimension;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.io.Serial;
 import java.util.stream.IntStream;
 import javax.swing.JButton;
 import javax.swing.JFrame;
@@ -45,6 +46,7 @@ import javax.swing.table.DefaultTableModel;
  */
 public class Target extends JFrame { //NOSONAR
 
+  @Serial
   private static final long serialVersionUID = 1L;
 
   private final JTable jt;

intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/TargetTest.java

@@ -25,7 +25,7 @@
 package com.iluwatar.intercepting.filter;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.jupiter.api.Test;
 
@@ -41,6 +41,6 @@ class TargetTest {
         final var target = new Target();
         assertEquals(target.getSize().getWidth(), Double.valueOf(640));
         assertEquals(target.getSize().getHeight(), Double.valueOf(480));
-        assertEquals(true,target.isVisible());
+        assertTrue(target.isVisible());
     }
 }