Profit & Loss Calculator Android Studio Project

 

🚀 1. ANDROID APP VERSION (JAVA)

📱 Profit & Loss Calculator — Android Studio Project

Step 1: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://

schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:padding="20dp"
    android:gravity="center"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/etCP"
        android:hint="Enter Cost Price"
        android:inputType="numberDecimal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <EditText
        android:id="@+id/etSP"
        android:hint="Enter Selling Price"
        android:inputType="numberDecimal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"/>

    <Button
        android:id="@+id/btnCalc"
        android:text="Calculate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"/>

    <TextView
        android:id="@+id/tvResult"
        android:text=""
        android:textSize="18sp"
        android:layout_marginTop="20dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

Step 2: MainActivity.java

package com.example.profitloss;

import androidx.appcompat.

app.AppCompatActivity;
import android.os.Bundle;
import android.widget.*;

public class MainActivity

 extends AppCompatActivity {

    EditText etCP, etSP;
    Button btnCalc;
    TextView tvResult;

    @Override
    protected void onCreate

(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        etCP = findViewById(R.id.etCP);
        etSP = findViewById(R.id.etSP);
        btnCalc = findViewById(R.id.btnCalc);
        tvResult = findViewById(R.id.tvResult);

        btnCalc.setOnClickListener(v -> {
            double cp = Double.

parseDouble(etCP.getText().toString());
            double sp = Double.

parseDouble(etSP.getText().toString());

            if (sp > cp) {
                double profit = sp - cp;
                double pp = profit / cp * 100;
                tvResult.setText("Profit:

 " + profit + "\nProfit %: " + pp);
            } else if (cp > sp) {
                double loss = cp - sp;
                double lp = loss / cp * 100;
                tvResult.setText("Loss: 

" + loss + "\nLoss %: " + lp);
            } else {
                tvResult.setText(

"No Profit No Loss");
            }
        });
    }
}

🎨 2. JavaFX GUI VERSION

Step 1: Main Application (Main.java)

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage stage) {
        TextField cpField = new TextField();
        cpField.setPromptText(

"Enter Cost Price");

        TextField spField = new TextField();
        spField.setPromptText(

"Enter Selling Price");

        Button calcBtn = new Button(

"Calculate");
        Label result = new Label();

        calcBtn.setOnAction(e -> {
            double cp = Double.

parseDouble(cpField.getText());
            double sp = Double.

parseDouble(spField.getText());

            if (sp > cp) {
                double profit = sp - cp;
                double percent =

 (profit / cp) * 100;
                result.setText(

"Profit: " + profit + " | " + percent + "%");
            } else if (cp > sp) {
                double loss = cp - sp;
                double percent = (

loss / cp) * 100;
                result.setText(

"Loss: " + loss + " | " + percent + "%");
            } else {
                result.setText(

"No Profit, No Loss");
            }
        });

        VBox root = new VBox(

10, cpField, spField, calcBtn, result);
        root.setPadding(new Insets(20));

        stage.setScene(new Scene(

root, 300, 250));
        stage.setTitle(

"Profit & Loss Calculator");
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

🌐 3. WEB VERSION (JSP + SERVLET)

Structure:

WebApp/
 ├── index.jsp
 ├── result.jsp
 └── ProfitLossServlet.java

Step 1: index.jsp

<!DOCTYPE html>
<html>
<body>
<h2>Profit & Loss Calculator</h2>

<form action="ProfitLossServlet" 

method="post">
    Cost Price: <input type="text"

 name="cp"><br><br>
    Selling Price: <input type="text" 

name="sp"><br><br>
    <input type="submit" value="Calculate">
</form>

</body>
</html>

Step 2: ProfitLossServlet.java

import jakarta.servlet.*;
import jakarta.servlet.http.*;
import java.io.IOException;

public class ProfitLossServlet 

extends HttpServlet {

    protected void doPost

(HttpServletRequest request,

 HttpServletResponse response)
            throws ServletException, 

IOException {

        double cp = 

Double.parseDouble(request.getParameter("cp"));
        double sp = 

Double.parseDouble(request.getParameter("sp"));

        String result;

        if (sp > cp) {
            double profit = sp - cp;
            double pp = profit / cp * 100;
            result = "Profit:

 " + profit + " ( " + pp + "% )";
        } else if (cp > sp) {
            double loss = cp - sp;
            double lp = loss / cp * 100;
            result = "Loss: " + loss 

+ " ( " + lp + "% )";
        } else {
            result = "No Profit No Loss";
        }

        request.setAttribute("result", 

result);
        RequestDispatcher rd = 

request.getRequestDispatcher("result.jsp");
        rd.forward(request, response);
    }
}

Step 3: result.jsp

<!DOCTYPE html>
<html>
<body>

<h2>Result</h2>
<p><b>${result}</b></p>

<a href="index.jsp">Go Back</a>

</body>
</html>