diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index fe7a72f..04382fb 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -1,12 +1,3 @@
-# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven
-
-# This workflow uses actions that are not certified by GitHub.
-# They are provided by a third-party and are governed by
-# separate terms of service, privacy policy, and support
-# documentation.
-
-
 name: Java CI with Maven
 
 on: [push, pull_request]
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2f7896d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+target/
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..f4cf18d
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,90 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.mycompany.app</groupId>
+  <artifactId>my-app</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>my-app</name>
+  <!-- FIXME change it to the project's website -->
+  <url>http://www.example.com</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.release>17</maven.compiler.release>
+  </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.junit</groupId>
+        <artifactId>junit-bom</artifactId>
+        <version>5.11.0</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <!-- Optionally: parameterized tests support -->
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-params</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+      <plugins>
+        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
+        <plugin>
+          <artifactId>maven-clean-plugin</artifactId>
+          <version>3.4.0</version>
+        </plugin>
+        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+        <plugin>
+          <artifactId>maven-resources-plugin</artifactId>
+          <version>3.3.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.13.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>3.3.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.4.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-install-plugin</artifactId>
+          <version>3.1.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-deploy-plugin</artifactId>
+          <version>3.1.2</version>
+        </plugin>
+        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
+        <plugin>
+          <artifactId>maven-site-plugin</artifactId>
+          <version>3.12.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-project-info-reports-plugin</artifactId>
+          <version>3.6.1</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>
diff --git a/src/main/java/com/mycompany/app/App.java b/src/main/java/com/mycompany/app/App.java
new file mode 100644
index 0000000..a83b6da
--- /dev/null
+++ b/src/main/java/com/mycompany/app/App.java
@@ -0,0 +1,12 @@
+package com.mycompany.app;
+
+public class App
+{
+   public static void main(String[] args)
+   {
+      double val=Double.parseDouble("2.0");
+      Sqrt sqrt=new Sqrt(val);
+      double result=sqrt.calc();
+      System.out.println("Sqrt of " + val + " = " + result);
+   }
+}
diff --git a/src/main/java/com/mycompany/app/Sqrt.java b/src/main/java/com/mycompany/app/Sqrt.java
new file mode 100644
index 0000000..0c1f37a
--- /dev/null
+++ b/src/main/java/com/mycompany/app/Sqrt.java
@@ -0,0 +1,29 @@
+package com.mycompany.app;
+
+public class Sqrt
+{
+   double delta=0.00000001;
+   double arg;
+
+   public Sqrt(double arg) {
+      this.arg=arg;
+   }
+   public double average(double x,double y) {
+      return (x+y)/2.0;
+   }
+   public boolean good(double guess,double x) {
+      return Math.abs(guess*guess-x)<delta;
+   }
+   public double improve(double guess,double x) {
+      return average(guess,x/guess);
+   }
+   public double iter(double guess, double x) {
+      if(good(guess,x))
+         return guess;
+      else
+         return iter(improve(guess,x),x);
+   }
+   public double calc() {
+      return iter(1.0,arg);
+   }
+}
diff --git a/src/test/java/com/mycompany/app/AppTest.java b/src/test/java/com/mycompany/app/AppTest.java
new file mode 100644
index 0000000..f83b6d1
--- /dev/null
+++ b/src/test/java/com/mycompany/app/AppTest.java
@@ -0,0 +1,13 @@
+package com.mycompany.app;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+
+public class AppTest {
+    @Test
+    public void shouldAnswerWithTrue() {
+        assertTrue(true);
+    }
+}
diff --git a/src/test/java/com/mycompany/app/SqrtTest.java b/src/test/java/com/mycompany/app/SqrtTest.java
new file mode 100644
index 0000000..755ba96
--- /dev/null
+++ b/src/test/java/com/mycompany/app/SqrtTest.java
@@ -0,0 +1,82 @@
+package com.mycompany.app;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class SqrtTest {
+
+    private Sqrt sqrt;
+
+    @BeforeEach
+    public void setUp() {
+        sqrt = new Sqrt(4.0);
+    }
+
+    @Test
+    public void testConstructorSetsArgument() {
+        Sqrt instance = new Sqrt(9.0);
+        assertEquals(9.0, instance.arg, 0.0);
+    }
+
+    @Test
+    public void testAverageOfTwoAndFour() {
+        assertEquals(3.0, sqrt.average(2.0, 4.0), 0.0);
+    }
+
+    @Test
+    public void testAverageOfEqualNumbers() {
+        assertEquals(5.0, sqrt.average(5.0, 5.0), 0.0);
+    }
+
+    @Test
+    public void testGoodReturnsTrueForAccurateGuess() {
+        assertTrue(sqrt.good(2.0, 4.0));
+    }
+
+    @Test
+    public void testGoodReturnsFalseForInaccurateGuess() {
+        assertFalse(sqrt.good(1.0, 4.0));
+    }
+
+    @Test
+    public void testImproveMovesGuessCloserToRoot() {
+        assertEquals(2.5, sqrt.improve(1.0, 4.0), 0.0);
+    }
+
+    @Test
+    public void testIterReturnsGuessWhenAlreadyGood() {
+        assertEquals(2.0, sqrt.iter(2.0, 4.0), 0.0);
+    }
+
+    @Test
+    public void testIterConvergesToSquareRoot() {
+        assertEquals(2.0, sqrt.iter(1.0, 4.0), 0.00000001);
+    }
+
+    @Test
+    public void testCalcForFour() {
+        assertEquals(2.0, sqrt.calc(), 0.00000001);
+    }
+
+    @Test
+    public void testCalcForTwo() {
+        Sqrt sqrtOfTwo = new Sqrt(2.0);
+        assertEquals(Math.sqrt(2.0), sqrtOfTwo.calc(), 0.00000001);
+    }
+
+    @Test
+    public void testCalcForNine() {
+        Sqrt sqrtOfNine = new Sqrt(9.0);
+        assertEquals(3.0, sqrtOfNine.calc(), 0.00000001);
+    }
+
+    @Test
+    public void testCalcForOne() {
+        Sqrt sqrtOfOne = new Sqrt(1.0);
+        assertEquals(1.0, sqrtOfOne.calc(), 0.00000001);
+    }
+}