- , *, / operators not working on my basic calculator (javafx) - javafx

Question

I'm working on this basic calculator project using javafx and fxml on eclipse. + operators work perfectly fine, but the /, -, * always gives an output of zero. Can't figure out the problem
Here is the class that process the input :
public class MainProcess {
#FXML
public Label result;
private long num1 = 0;
private long num2 = 0;
private String operator = "";
private boolean start = true;
private Calculation model = new Calculation();
#FXML
public void processNumbers(ActionEvent event) {
if (start)
{
result.setText("");
start = false;
}
String value = ((Button)event.getSource()).getText();
result.setText(result.getText() + value);
}
#FXML
public void processOperators(ActionEvent event)
{
String value = ((Button)event.getSource()).getText();
if (!value.equals("="))
{
if (!operator.isEmpty())
return;
operator = value;
num1 = Long.parseLong(result.getText());
result.setText("");
return;
}
else
{
if (operator.isEmpty())
return;
num2 = Long.parseLong(result.getText());
long output = model.calculate(num1, num2, operator);
result.setText(String.valueOf(output));
operator = "";
start = true;
}
}
#FXML
public void Ac(ActionEvent event) {
operator = "";
start = true;
result.setText("");
}
}
Here is the class that is doing the arithmetic :
public class Calculation {
public long calculate(long num1, long num2, String operator)
{
switch (operator)
{
case "+":
return num1+num2;
case "-":
return num1-num2;
case "*":
return num1*num2;
case "/":
if(num2==0)
return 0;
return num1/num2;
default:
return 0 ;
}
}
}
Here is the 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.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Font?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="537.0" prefWidth="298.0" style="-fx-background-color: rgba(0,0,0,0);" xmlns="http://javafx.com/javafx/18" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MainProcess">
<children>
<VBox alignment="CENTER" prefHeight="200.0" prefWidth="100.0" style="-fx-background-color: #1C1C1C; -fx-background-radius: 30;" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<Label fx:id="result" alignment="BOTTOM_RIGHT" prefHeight="197.0" prefWidth="361.0" style="-fx-background-color: #af21611;" text="0" textFill="WHITE">
<VBox.margin>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</VBox.margin>
<font>
<Font name="Arial" size="48.0" />
</font>
</Label>
<GridPane alignment="CENTER" hgap="10.0" vgap="10.0">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" maxWidth="-Infinity" minWidth="-Infinity" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="-Infinity" minWidth="-Infinity" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="-Infinity" minWidth="-Infinity" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="-Infinity" minWidth="-Infinity" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="-Infinity" minHeight="10.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="-Infinity" minHeight="10.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="-Infinity" minHeight="10.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="-Infinity" minHeight="10.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="-Infinity" minHeight="10.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="-Infinity" minHeight="10.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Button mnemonicParsing="false" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #D4D4D2;" text="+/-" GridPane.columnIndex="1">
<font>
<Font name="Arial" size="19.0" />
</font>
</Button>
<Button mnemonicParsing="false" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #D4D4D2;" text="\%" GridPane.columnIndex="2">
<font>
<Font name="Arial" size="19.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processOperators" prefHeight="55.0" prefWidth="55.0" style="-fx-background-color: FF9500; -fx-background-radius: 30;" text="/" textFill="WHITE" GridPane.columnIndex="3">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="4" textFill="WHITE" GridPane.rowIndex="2">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="7" textFill="WHITE" GridPane.rowIndex="1">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="8" textFill="WHITE" GridPane.columnIndex="1" GridPane.rowIndex="1">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="5" textFill="WHITE" GridPane.columnIndex="1" GridPane.rowIndex="2">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="9" textFill="WHITE" GridPane.columnIndex="2" GridPane.rowIndex="1">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="6" textFill="WHITE" GridPane.columnIndex="2" GridPane.rowIndex="2">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processOperators" prefHeight="55.0" prefWidth="55.0" style="-fx-background-color: FF9500; -fx-background-radius: 30;" text="x" textFill="WHITE" GridPane.columnIndex="3" GridPane.rowIndex="1">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processOperators" prefHeight="55.0" prefWidth="55.0" style="-fx-background-color: FF9500; -fx-background-radius: 30;" text="−" textFill="WHITE" GridPane.columnIndex="3" GridPane.rowIndex="2">
<font>
<Font name="Arial" size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="1" textFill="WHITE" GridPane.rowIndex="3">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="2" textFill="WHITE" GridPane.columnIndex="1" GridPane.rowIndex="3">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="3" textFill="WHITE" GridPane.columnIndex="2" GridPane.rowIndex="3">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processOperators" prefHeight="55.0" prefWidth="55.0" style="-fx-background-color: FF9500; -fx-background-radius: 30;" text="+" textFill="WHITE" GridPane.columnIndex="3" GridPane.rowIndex="3">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processNumbers" prefHeight="57.0" prefWidth="110.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="0" textFill="WHITE" GridPane.columnSpan="2" GridPane.rowIndex="4">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #505050;" text="," textFill="WHITE" GridPane.columnIndex="2" GridPane.rowIndex="4">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#processOperators" prefHeight="55.0" prefWidth="55.0" style="-fx-background-color: FF9500; -fx-background-radius: 30;" text="=" textFill="WHITE" GridPane.columnIndex="3" GridPane.rowIndex="4">
<font>
<Font size="27.0" />
</font>
</Button>
<Button mnemonicParsing="false" onAction="#Ac" prefHeight="55.0" prefWidth="55.0" style="-fx-background-radius: 30; -fx-background-color: #D4D4D2;" text="AC">
<font>
<Font name="Arial" size="19.0" />
</font>
</Button>
</children>
</GridPane>
</children>
</VBox>
</children>
</AnchorPane>
Note that in my fxml, each button is associated to the right method, so the problem must come from the javafx code
** Sorry if the way of asking the question is not right, Ill take any good advice
Thanks!