created the controller

pom.xml

@@ -1,17 +1,72 @@
-<?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>org.example</groupId>
-    <artifactId>untitled</artifactId>
+    <groupId>com.example</groupId>
+    <artifactId>steam-tables</artifactId>
     <version>1.0-SNAPSHOT</version>
 
-    <properties>
-        <maven.compiler.source>23</maven.compiler.source>
-        <maven.compiler.target>23</maven.compiler.target>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    </properties>
+    <repositories>
+        <repository>
+            <id>central</id>
+            <url>https://repo.maven.apache.org/maven2</url>
+        </repository>
+    </repositories>
 
-</project>
+
+    <dependencies>
+        <!-- Apache POI for Excel manipulation -->
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi</artifactId>
+            <version>5.2.3</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi-ooxml</artifactId>
+            <version>5.2.3</version>
+        </dependency>
+
+        <!-- XML Parser (optional, needed for reading XLSX) -->
+        <dependency>
+            <groupId>org.apache.xmlbeans</groupId>
+            <artifactId>xmlbeans</artifactId>
+            <version>5.0.3</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>2.0.9</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>2.0.9</version>
+        </dependency>
+
+        <!-- JUnit for Testing -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.9.3</version> <!-- Use this stable version -->
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.10.1</version>
+                <configuration>
+                    <source>17</source>
+                    <target>17</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/main/java/org/example/Main.java → src/main/java/Main.java

@@ -1,5 +1,3 @@
-package org.example;
-
 public class Main {
     public static void main(String[] args) {
         System.out.println("Hello, World!");

src/main/java/steamTables/Controller.java

@@ -0,0 +1,168 @@
+package steamTables;
+
+
+public class Controller {
+
+    private static DataBase db ;
+
+
+    public Controller() {
+        db = new DataBase();
+    }
+
+    // Find Steam Using Temperature and Pressure
+    public Steam findTheSteamUsingTP(double T, double P) {
+        Steam steam = new Steam();
+        steam.setT(T);
+        steam.setP(P);
+        return steam;
+    }
+
+    // Find Steam Using Temperature and Volume
+    public Steam findTheSteamUsingTV(double T, double v) {
+        Steam steam = new Steam();
+        steam.setT(T);
+        steam.setV(v);
+
+        return steam;
+    }
+
+    // Find Steam Using Temperature and Internal Energy
+    public Steam findTheSteamUsingTU(double T, double u) {
+        Steam steam = new Steam();
+        steam.setT(T);
+        steam.setU(u);
+        return steam;
+    }
+
+    // Find Steam Using Temperature and Enthalpy
+    public Steam findTheSteamUsingTH(double T, double h) {
+        Steam steam = new Steam();
+        steam.setT(T);
+        steam.setH(h);
+
+        return steam;
+    }
+
+    // Find Steam Using Temperature and Quality
+    public Steam findTheSteamUsingTX(double T, double X) {
+        Steam steam = new Steam();
+        steam.setT(T);
+        steam.setX(X);
+        setPhase(steam, X);
+
+        return steam;
+    }
+
+    // Find Steam Using Temperature and Entropy
+    public Steam findTheSteamUsingTS(double T, double s) {
+        Steam steam = new Steam();
+        steam.setT(T);
+        return steam;
+    }
+
+    // Find Steam Using Pressure and Volume
+    public Steam findTheSteamUsingPV(double P, double v) {
+        Steam steam = new Steam();
+        steam.setP(P);
+
+        return steam;
+    }
+
+    // Find Steam Using Pressure and Internal Energy
+    public Steam findTheSteamUsingPU(double P, double u) {
+        Steam steam = new Steam();
+        steam.setP(P);
+        steam.setU(u);
+        return steam;
+    }
+
+    // Find Steam Using Pressure and Enthalpy
+    public Steam findTheSteamUsingPH(double P, double h) {
+        Steam steam = new Steam();
+        steam.setP(P);
+        steam.setH(h);
+
+
+        return steam;
+    }
+
+    // Find Steam Using Pressure and Quality
+    public Steam findTheSteamUsingPX(double P, double X) {
+        Steam steam = new Steam();
+        steam.setP(P);
+        steam.setX(X);
+        setPhase(steam, X);
+
+        return steam;
+    }
+
+    // Find Steam Using Pressure and Entropy
+    public Steam findTheSteamUsingPS(double P, double s) {
+        Steam steam = new Steam();
+        steam.setP(P);
+        steam.setS(s);
+
+        return steam;
+    }
+
+    public Steam findTheSteamUsingUV(double u, double v) {
+        Steam steam = new Steam();
+        steam.setV(v);
+        steam.setU(u);
+        return steam;
+    }
+
+    public Steam findTheSteamUsingUX(double u, double X) {
+        Steam steam = new Steam();
+        steam.setX(X);
+        steam.setU(u);
+        setPhase(steam, X);
+        return steam;
+    }
+
+    private void setPhase(Steam steam, double X) {
+        if (X ==1) {
+            steam.setSteamPhase(SteamPhase.SaturatedLiquid);
+        }
+        else if (X ==0) {
+            steam.setSteamPhase(SteamPhase.SaturatedVapour);
+        }
+        else if ( X > 1 || X < 0 ) {
+            throw new IllegalArgumentException("X must be between 0 and 1");
+        }
+        else {
+            steam.setSteamPhase(SteamPhase.saturatedMixture);
+        }
+    }
+
+    public Steam findTheSteamUsingTState(double T, SteamPhase phase) {
+        Steam steam = new Steam();
+        steam.setT(T);
+        steam.setSteamPhase(phase);
+        steam.setX(phase.getX());
+        return steam;
+
+    }
+
+    public Steam findTheSteamUsingPState(double P, SteamPhase phase) {
+        Steam steam = new Steam();
+        steam.setP(P);
+        steam.setSteamPhase(phase);
+        steam.setX(phase.getX());
+        return steam;
+
+    }
+
+    public Steam findTheSteamUsingHState(double H, SteamPhase phase) {
+        Steam steam = new Steam();
+        steam.setH(H);
+        steam.setSteamPhase(phase);
+        steam.setX(phase.getX());
+        return steam;
+
+    }
+
+
+
+}