From 9cc307e108fe4946da81bcfb1e114ed0347b73c5 Mon Sep 17 00:00:00 2001
From: DiegoMarti2 <150871541+DiegoMarti2@users.noreply.github.com>
Date: Fri, 22 Mar 2024 23:08:14 +0200
Subject: [PATCH] baeldung-articles : BAEL-6752 (#16195)

* baeldung-articles : BAEL-6752

When to Use Setter Methods or Constructors for Setting a Variable's Value in Java.

* baeldung-articles : BAEL-6752

When to Use Setter Methods or Constructors for Setting a Variable's Value in Java.

* Updating ConstructorsVersusSetterMethodsUnitTest.java

Rename functions
---
 .../Product.java                              | 26 ++++++++++++++++
 .../constructorversussettermethod/User.java   | 31 +++++++++++++++++++
 ...nstructorsVersusSetterMethodsUnitTest.java | 30 ++++++++++++++++++
 3 files changed, 87 insertions(+)
 create mode 100644 core-java-modules/core-java-lang-oop-constructors-2/src/main/java/com/baeldung/objectcreation/constructorversussettermethod/Product.java
 create mode 100644 core-java-modules/core-java-lang-oop-constructors-2/src/main/java/com/baeldung/objectcreation/constructorversussettermethod/User.java
 create mode 100644 core-java-modules/core-java-lang-oop-constructors-2/src/test/java/com/baeldung/objectcreation/constructorversussettermethod/ConstructorsVersusSetterMethodsUnitTest.java

diff --git a/core-java-modules/core-java-lang-oop-constructors-2/src/main/java/com/baeldung/objectcreation/constructorversussettermethod/Product.java b/core-java-modules/core-java-lang-oop-constructors-2/src/main/java/com/baeldung/objectcreation/constructorversussettermethod/Product.java
new file mode 100644
index 0000000000..f8c04a3f81
--- /dev/null
+++ b/core-java-modules/core-java-lang-oop-constructors-2/src/main/java/com/baeldung/objectcreation/constructorversussettermethod/Product.java
@@ -0,0 +1,26 @@
+package com.baeldung.constructorversussettermethod;
+
+public class Product {
+    private String name;
+    private double price;
+    private String category;
+
+    public Product(String name, double price, String category) {
+        this.name = name;
+        this.price = price;
+        this.category = category;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+}
+
diff --git a/core-java-modules/core-java-lang-oop-constructors-2/src/main/java/com/baeldung/objectcreation/constructorversussettermethod/User.java b/core-java-modules/core-java-lang-oop-constructors-2/src/main/java/com/baeldung/objectcreation/constructorversussettermethod/User.java
new file mode 100644
index 0000000000..57ec590470
--- /dev/null
+++ b/core-java-modules/core-java-lang-oop-constructors-2/src/main/java/com/baeldung/objectcreation/constructorversussettermethod/User.java
@@ -0,0 +1,31 @@
+package com.baeldung.constructorversussettermethod;
+
+public class User {
+    private String username;
+    private String password;
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        if (username.matches("[a-zA-Z0-9_]+")) {
+            this.username = username;
+        } else {
+            throw new IllegalArgumentException("Invalid username format");
+        }
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        if (password.length() >= 8) {
+            this.password = password;
+        } else {
+            throw new IllegalArgumentException("Password must be at least 8 characters long");
+        }
+    }
+}
+
diff --git a/core-java-modules/core-java-lang-oop-constructors-2/src/test/java/com/baeldung/objectcreation/constructorversussettermethod/ConstructorsVersusSetterMethodsUnitTest.java b/core-java-modules/core-java-lang-oop-constructors-2/src/test/java/com/baeldung/objectcreation/constructorversussettermethod/ConstructorsVersusSetterMethodsUnitTest.java
new file mode 100644
index 0000000000..09294e2232
--- /dev/null
+++ b/core-java-modules/core-java-lang-oop-constructors-2/src/test/java/com/baeldung/objectcreation/constructorversussettermethod/ConstructorsVersusSetterMethodsUnitTest.java
@@ -0,0 +1,30 @@
+package com.baeldung.constructorversussettermethod;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class ConstructorsVersusSetterMethodsUnitTest {
+    @Test
+    public void givenNewUser_whenSettingUsername_thenUsernameIsSet() {
+        User user = new User();
+        user.setUsername("john_doe");
+        assertEquals("john_doe", user.getUsername());
+    }
+
+    @Test
+    public void givenNewUser_whenSettingPassword_thenPasswordIsSet() {
+        User user = new User();
+        user.setPassword("strongPassword123");
+        assertEquals("strongPassword123", user.getPassword());
+    }
+
+    @Test
+    public void givenProductDetails_whenCreatingProductWithConstructor_thenProductHasCorrectAttributes() {
+        Product product = new Product("Smartphone", 599.99, "Electronics");
+        assertEquals("Smartphone", product.getName());
+        assertEquals(599.99, product.getPrice(), 0.001);
+        assertEquals("Electronics", product.getCategory());
+    }
+}
+