diff --git a/core-java-modules/core-java-numbers-7/src/main/java/com/baeldung/complexnumbers/ComplexNumber.java b/core-java-modules/core-java-numbers-7/src/main/java/com/baeldung/complexnumbers/ComplexNumber.java
index e2791a0a60..3283b081fe 100644
--- a/core-java-modules/core-java-numbers-7/src/main/java/com/baeldung/complexnumbers/ComplexNumber.java
+++ b/core-java-modules/core-java-numbers-7/src/main/java/com/baeldung/complexnumbers/ComplexNumber.java
@@ -3,16 +3,9 @@ package com.baeldung.complexnumbers;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-public class ComplexNumber {
-    public double real;
-    public double imaginary;
+public record ComplexNumber(double real, double imaginary) {
 
-    public ComplexNumber(double a, double b) {
-        this.real = a;
-        this.imaginary = b;
-    }
-
-    public ComplexNumber(String complexNumberStr) {
+    public static ComplexNumber fromString(String complexNumberStr) {
 
         Pattern pattern = Pattern.compile("(-?\\d*\\.?\\d+)?(?:([+-]?\\d*\\.?\\d+)i)?");
         Matcher matcher = pattern.matcher(complexNumberStr.replaceAll("\\s", ""));
@@ -23,29 +16,22 @@ public class ComplexNumber {
             String imaginaryPartStr = matcher.group(2);
 
             // Parse real part (if present)
-            real = (realPartStr != null) ? Double.parseDouble(realPartStr) : 0;
+            double real = (realPartStr != null) ? Double.parseDouble(realPartStr) : 0;
 
             // Parse imaginary part (if present)
-            imaginary = (imaginaryPartStr != null) ? Double.parseDouble(imaginaryPartStr) : 0;
+            double imaginary = (imaginaryPartStr != null) ? Double.parseDouble(imaginaryPartStr) : 0;
+            return new ComplexNumber(real, imaginary);
         } else {
             throw new IllegalArgumentException("Invalid complex number format(" + complexNumberStr + "), supported format is `a+bi`");
         }
     }
 
-    public double getReal() {
-        return real;
-    }
-
-    public double getImaginary() {
-        return imaginary;
-    }
-
     public String toString() {
         return real + "+" + imaginary + "i";
     }
 
     public ComplexNumber add(ComplexNumber that) {
-        return new ComplexNumber(real + that.getReal(), imaginary + that.getImaginary());
+        return new ComplexNumber(real + that.real, imaginary + that.imaginary);
     }
 
     public ComplexNumber multiply(ComplexNumber that) {
@@ -55,7 +41,7 @@ public class ComplexNumber {
     }
 
     public ComplexNumber subtract(ComplexNumber that) {
-        return new ComplexNumber(real - that.getReal(), imaginary - that.getImaginary());
+        return new ComplexNumber(real - that.real, imaginary - that.imaginary);
     }
 
     public ComplexNumber divide(ComplexNumber that) {
diff --git a/core-java-modules/core-java-numbers-7/src/test/java/com/baeldung/complexnumbers/ComplexNumberOperationsUnitTest.java b/core-java-modules/core-java-numbers-7/src/test/java/com/baeldung/complexnumbers/ComplexNumberOperationsUnitTest.java
index c7f726c80b..b3c95b7346 100644
--- a/core-java-modules/core-java-numbers-7/src/test/java/com/baeldung/complexnumbers/ComplexNumberOperationsUnitTest.java
+++ b/core-java-modules/core-java-numbers-7/src/test/java/com/baeldung/complexnumbers/ComplexNumberOperationsUnitTest.java
@@ -19,9 +19,9 @@ public class ComplexNumberOperationsUnitTest {
             "2+4i, 0, 0"
     })
     public void multiply_two_complex_numbers(String complexStr1, String complexStr2, String expectedStr) {
-        ComplexNumber complex1 = new ComplexNumber(complexStr1);
-        ComplexNumber complex2 = new ComplexNumber(complexStr2);
-        ComplexNumber expected = new ComplexNumber(expectedStr);
+        ComplexNumber complex1 = ComplexNumber.fromString(complexStr1);
+        ComplexNumber complex2 = ComplexNumber.fromString(complexStr2);
+        ComplexNumber expected = ComplexNumber.fromString(expectedStr);
         ComplexNumber product = complex1.multiply(complex2);
         Assertions.assertTrue(isSame(product, expected));
     }
@@ -39,9 +39,9 @@ public class ComplexNumberOperationsUnitTest {
             "2+4i, 0, 2+4i"
     })
     public void add_two_complex_numbers(String complexStr1, String complexStr2, String expectedStr) {
-        ComplexNumber complex1 = new ComplexNumber(complexStr1);
-        ComplexNumber complex2 = new ComplexNumber(complexStr2);
-        ComplexNumber expected = new ComplexNumber(expectedStr);
+        ComplexNumber complex1 = ComplexNumber.fromString(complexStr1);
+        ComplexNumber complex2 = ComplexNumber.fromString(complexStr2);
+        ComplexNumber expected = ComplexNumber.fromString(expectedStr);
         ComplexNumber sum = complex1.add(complex2);
         Assertions.assertTrue(isSame(sum, expected));
     }
@@ -59,9 +59,9 @@ public class ComplexNumberOperationsUnitTest {
             "2+4i, 0, 2+4i"
     })
     public void subtract_two_complex_numbers(String complexStr1, String complexStr2, String expectedStr) {
-        ComplexNumber complex1 = new ComplexNumber(complexStr1);
-        ComplexNumber complex2 = new ComplexNumber(complexStr2);
-        ComplexNumber expected = new ComplexNumber(expectedStr);
+        ComplexNumber complex1 = ComplexNumber.fromString(complexStr1);
+        ComplexNumber complex2 = ComplexNumber.fromString(complexStr2);
+        ComplexNumber expected = ComplexNumber.fromString(expectedStr);
         ComplexNumber sum = complex1.subtract(complex2);
         Assertions.assertTrue(isSame(sum, expected));
     }
@@ -79,14 +79,14 @@ public class ComplexNumberOperationsUnitTest {
             "2+4i, 1, 2+4i"
     })
     public void divide_two_complex_numbers(String complexStr1, String complexStr2, String expectedStr) {
-        ComplexNumber complex1 = new ComplexNumber(complexStr1);
-        ComplexNumber complex2 = new ComplexNumber(complexStr2);
-        ComplexNumber expected = new ComplexNumber(expectedStr);
+        ComplexNumber complex1 = ComplexNumber.fromString(complexStr1);
+        ComplexNumber complex2 = ComplexNumber.fromString(complexStr2);
+        ComplexNumber expected = ComplexNumber.fromString(expectedStr);
         ComplexNumber sum = complex1.divide(complex2);
         Assertions.assertTrue(isSame(sum, expected));
     }
 
     public boolean isSame(ComplexNumber result, ComplexNumber expected) {
-        return result.real == expected.real && result.imaginary == expected.imaginary;
+        return result.real() == expected.real() && result.imaginary() == expected.imaginary();
     }
 }