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Calculator written in Java 8 with JavaFX 8 + SceneBuilder 2.0
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package net.argius.calculator; | |
import java.math.BigDecimal; | |
import javafx.application.Application; | |
import javafx.application.Platform; | |
import javafx.event.ActionEvent; | |
import javafx.fxml.FXML; | |
import javafx.fxml.FXMLLoader; | |
import javafx.scene.Scene; | |
import javafx.scene.control.Button; | |
import javafx.scene.control.TextField; | |
import javafx.stage.Stage; | |
public final class App extends Application { | |
private BigDecimal left; | |
private String selectedOperator; | |
private boolean numberInputting; | |
@FXML | |
private TextField display; | |
public App() { | |
this.left = BigDecimal.ZERO; | |
this.selectedOperator = ""; | |
this.numberInputting = false; | |
} | |
@Override | |
public void start(Stage stage) throws Exception { | |
stage.setTitle("Calculator"); | |
stage.setOnCloseRequest(x -> { | |
Platform.exit(); | |
}); | |
stage.setResizable(false); | |
stage.setScene(new Scene(FXMLLoader.load(getClass().getResource("main.fxml")))); | |
stage.show(); | |
} | |
@FXML | |
protected void handleOnAnyButtonClicked(ActionEvent evt) { | |
Button button = (Button)evt.getSource(); | |
final String buttonText = button.getText(); | |
if (buttonText.equals("C") || buttonText.equals("AC")) { | |
if (buttonText.equals("AC")) { | |
left = BigDecimal.ZERO; | |
} | |
selectedOperator = ""; | |
numberInputting = false; | |
display.setText("0");; | |
return; | |
} | |
if (buttonText.matches("[0-9\\.]")) { | |
if (!numberInputting) { | |
numberInputting = true; | |
display.clear(); | |
} | |
display.appendText(buttonText); | |
return; | |
} | |
if (buttonText.matches("[+-×÷]")) { | |
left = new BigDecimal(display.getText()); | |
selectedOperator = buttonText; | |
numberInputting = false; | |
return; | |
} | |
if (buttonText.equals("=")) { | |
final BigDecimal right = numberInputting ? new BigDecimal(display.getText()) : left; | |
left = calculate(selectedOperator, left, right); | |
display.setText(left.toString()); | |
numberInputting = false; | |
return; | |
} | |
} | |
static BigDecimal calculate(String operator, BigDecimal left, BigDecimal right) { | |
switch (operator) { | |
case "+": | |
return left.add(right); | |
case "-": | |
return left.subtract(right); | |
case "×": | |
return left.multiply(right); | |
case "÷": | |
return left.divide(right); | |
default: | |
} | |
return right; | |
} | |
public static void main(String[] args) { | |
launch(args); | |
} | |
} |
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.background { | |
-fx-background-color: #663333; | |
} | |
.button { | |
-fx-background-color: silver; | |
} | |
.display { | |
-fx-background-color: #cccccc; | |
} |
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<?xml version="1.0" encoding="UTF-8"?> | |
<?import javafx.scene.text.*?> | |
<?import javafx.geometry.*?> | |
<?import javafx.scene.control.*?> | |
<?import java.lang.*?> | |
<?import javafx.scene.layout.*?> | |
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="249.0" prefWidth="244.0" styleClass="background" stylesheets="@main.css" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="net.argius.calculator.App"> | |
<children> | |
<Button layoutX="71.0" layoutY="171.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="1" /> | |
<Button layoutX="106.0" layoutY="171.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="2" /> | |
<Button layoutX="140.0" layoutY="171.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="3" /> | |
<Button layoutX="71.0" layoutY="134.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="4" /> | |
<Button layoutX="106.0" layoutY="134.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="5" /> | |
<Button layoutX="140.0" layoutY="134.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="6" /> | |
<Button layoutX="71.0" layoutY="97.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="7" /> | |
<Button layoutX="106.0" layoutY="97.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="8" /> | |
<Button layoutX="140.0" layoutY="97.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="9" /> | |
<TextField fx:id="display" alignment="BOTTOM_RIGHT" editable="false" layoutX="31.0" layoutY="14.0" prefHeight="35.0" prefWidth="178.0" styleClass="display" text="0"> | |
<font> | |
<Font name="Lucida Console" size="20.0" /> | |
</font> | |
</TextField> | |
<Button layoutX="27.0" layoutY="97.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="C" /> | |
<Button layoutX="167.0" layoutY="208.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" prefHeight="23.0" prefWidth="47.0" text="=" /> | |
<Button layoutX="187.0" layoutY="171.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="+" /> | |
<Button layoutX="71.0" layoutY="208.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="0" /> | |
<Button layoutX="187.0" layoutY="134.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="-" /> | |
<Button layoutX="188.0" layoutY="97.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" prefHeight="23.0" prefWidth="25.0" styleClass="background" text="×" /> | |
<Button layoutX="188.0" layoutY="61.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" styleClass="background" text="÷" /> | |
<Button layoutX="25.0" layoutY="61.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="AC" /> | |
<Button layoutX="142.0" layoutY="208.0" mnemonicParsing="false" onAction="#handleOnAnyButtonClicked" text="." /> | |
</children> | |
</AnchorPane> |
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Thank you!
Great code!