JavaFX is a wonderful improvement to the Java programming language. It includes a wide number of new user interface controls and the ability to add cascade style sheets (CSS), Animations etc. Today, Let’s see how we can build a beautiful advanced calculator in JavaFX with CSS styling. This calculator is done using eclipse IDE and JavaFX Scene Builder 2.0.
This is an advance calculator with a simple UI where you can Add, Substract, Multiply, Divide, Log, Exponential, Factorial, and many more functions are available to calculate
Main.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>
<AnchorPane prefHeight="455.0" prefWidth="294.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MainController">
<children>
<Label fx:id="result" alignment="CENTER_RIGHT" prefHeight="66.0" prefWidth="419.0" style="-fx-background-color: white; -fx-border-color: black;">
<font>
<Font size="37.0" />
</font>
<opaqueInsets>
<Insets />
</opaqueInsets>
</Label>
<AnchorPane layoutX="-4.0" layoutY="66.0" prefHeight="392.0" prefWidth="423.0" style="-fx-background-color: silver;">
<children>
<Button layoutX="146.0" layoutY="162.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="6">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="83.0" layoutY="100.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="8">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="146.0" layoutY="100.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="9">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="14.0" layoutY="162.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="4">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="83.0" layoutY="162.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="5">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="14.0" layoutY="100.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="7">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="14.0" layoutY="223.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="1">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="83.0" layoutY="223.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="2">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="146.0" layoutY="223.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text="3">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="14.0" layoutY="295.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="54.0" prefWidth="121.0" text="0">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="146.0" layoutY="293.0" mnemonicParsing="false" onAction="#processNumber" prefHeight="49.0" prefWidth="52.0" text=".">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="216.0" layoutY="295.0" mnemonicParsing="false" onAction="#processBinaryOperator" prefHeight="49.0" prefWidth="52.0" text="=">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="216.0" layoutY="100.0" mnemonicParsing="false" onAction="#processBinaryOperator" prefHeight="49.0" prefWidth="52.0" text="-">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="216.0" layoutY="162.0" mnemonicParsing="false" onAction="#processBinaryOperator" prefHeight="49.0" prefWidth="52.0" text="*">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="216.0" layoutY="223.0" mnemonicParsing="false" onAction="#processBinaryOperator" prefHeight="49.0" prefWidth="52.0" text="/">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="289.0" layoutY="100.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="ln">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="355.0" layoutY="100.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="Cos">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="289.0" layoutY="162.0" mnemonicParsing="false" onAction="#processBinaryOperator" prefHeight="49.0" prefWidth="52.0" text="x^y">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="355.0" layoutY="162.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="Tan">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="289.0" layoutY="223.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="x^2">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="355.0" layoutY="223.0" mnemonicParsing="false" onAction="#processBinaryOperator" prefHeight="49.0" prefWidth="52.0" text="Mod">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="289.0" layoutY="295.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="x^3">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="355.0" layoutY="295.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="x!">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="14.0" layoutY="28.0" mnemonicParsing="false" onAction="#ClearFunction" prefHeight="49.0" prefWidth="52.0" text="c">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="83.0" layoutY="28.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="e^x">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="146.0" layoutY="28.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="√">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="216.0" layoutY="28.0" mnemonicParsing="false" onAction="#processBinaryOperator" prefHeight="49.0" prefWidth="52.0" text="+">
<font>
<Font size="25.0" />
</font>
</Button>
<Button layoutX="289.0" layoutY="28.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="Log">
<font>
<Font size="15.0" />
</font>
</Button>
<Button layoutX="355.0" layoutY="28.0" mnemonicParsing="false" onAction="#processUnaryOperator" prefHeight="49.0" prefWidth="52.0" text="Sin">
<font>
<Font size="15.0" />
</font>
</Button>
</children>
</AnchorPane>
</children>
</AnchorPane>
MainController.java
package application;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
public class MainController {
@FXML
private Label result;
private float number1=0;
private float number2=0;
private String operator="";
private boolean start=true;
private Calclulate calculate=new Calclulate();
@FXML
public void processNumber(ActionEvent event){
if(start){
result.setText("");
start=false;
}
String value=((Button)event.getSource()).getText();
result.setText(result.getText()+ value);
}
@FXML
public void processBinaryOperator(ActionEvent event) {
String value=((Button)event.getSource()).getText();
if(!value.equals("=")){
if(!operator.isEmpty())
return;
operator = value;
number1=Float.parseFloat(result.getText());
result.setText("");
}else{
if(operator.isEmpty())
return;
number2=Float.parseFloat(result.getText());
float output=calculate.calculateBinaryNumber(number1, number2, operator);
result.setText(String.valueOf(output));
operator="";
}
}
public void processUnaryOperator(ActionEvent event) {
String value=((Button)event.getSource()).getText();
if(!operator.isEmpty())
return;
operator = value;
number1=Float.parseFloat(result.getText());
result.setText("");
float output=calculate.calculateUnaryNumber(number1,operator);
result.setText(String.valueOf(output));
operator="";
}
public void ClearFunction(ActionEvent event){
operator="";
start=true;
result.setText("");
}
}
Calclulate.Java
package application;
public class Calclulate {
public float calculateUnaryNumber(float number1,String operator){
switch (operator) {
case "√":
return (long)Math.sqrt(number1);
case "Sin":
return (float)Math.sin(number1);
case "Cos":
return (long)Math.cos(number1);
case "Tan":
return (float)Math.tan(number1);
case "e^x":
return (float) Math.exp(number1);
case "x^2":
return number1*number1;
case "x^3":
return number1*number1*number1;
case "Log":
return (float) Math.log10(number1);
case "ln":
return (float) Math.log(number1);
case "x!":
int fact=1;
for(int i=1;i<=number1;i++)
fact=fact*i;
return fact;
default:
break;
}
return 0;
}
public float calculateBinaryNumber(float number1,float number2,String operator){
switch (operator) {
case "+":
return number1 + number2;
case "-":
return number1 - number2;
case "*":
return number1 * number2;
case "/":
if(number2==0)
return 0;
return number1 / number2;
case "Mod":
return number1 % number2;
case "x^y":
return (float) Math.pow(number1, number2);
default:
break;
}
return 0;
}
}
Main.java
package application;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;
import javafx.scene.Parent;
import javafx.scene.Scene;
public class Main extends Application {
@Override
public void start(Stage primaryStage) {
try {
Parent root = FXMLLoader.load(getClass().getResource("/application/Main.fxml"));
Scene scene = new Scene(root);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}Output/Screen Shot
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