[英]How do I create a second list and a reverse button to interchange between the currencies in my currency converter using JavaFX? [closed]
到目前为止,这是我的代码:
package currencyconverter;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.event.Event;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage appStage) throws Exception {
Scene scene = new Scene(new Main().dataCollectionDialogue(),473,315);
appStage.setScene(scene);
appStage.setTitle("Currency converter");
appStage.show();//launch the application
}
public Pane dataCollectionDialogue(){
Pane pane = new Pane();
Label label = new Label("Convert from Euros");
label.setLayoutY(40);
label.setLayoutX(120);
TextField amount = new TextField();
amount.setPromptText("Enter the amount to convert");
amount.setLayoutY(69);
amount.setLayoutX(133);
amount.setPrefWidth(100);
Button btn = new Button("Convert");
btn.setLayoutY(270);
btn.setLayoutX(195);
ComboBox<currencies> countriesComboBox = new ComboBox<>();
countriesComboBox.setItems(FXCollections.observableArrayList(currencies.values()));
countriesComboBox.setPromptText("Select a Currency");
countriesComboBox.setLayoutY(165);
countriesComboBox.setLayoutX(133);
btn.setOnAction(event -> {
String countryName= countriesComboBox.getValue().toString();
double m = Double.parseDouble(amount.getText());
double convert = currencyCalculator(countryName, m);
String message = "The converted amount is : "+convert;
Stage stage = new Stage();
Scene scene = new Scene(getConvertedAmountWindow(message));
stage.setScene(scene);
stage.setTitle("results");
stage.show();
});
pane.getChildren().addAll(label, amount,btn,countriesComboBox);
return pane;
}
private Pane getConvertedAmountWindow( String toDisplay){
Pane pane = new Pane();
pane.setPrefSize(473, 117);
Label label = new Label();
label.setLayoutX(121);
label.setLayoutY(50);
label.setText(toDisplay);
pane.getChildren().addAll(label);
return pane;
}
private double currencyCalculator(String currency, double amountTocConvert){
double amount = 0;
//currency conversion selection process
switch (currency){
case "USD":
amount = amountTocConvert*1.071970;
break;
case "GBP":
amount = amountTocConvert*0.858277;
}
return amount;
}
enum currencies{
USD,
GBP
}
}
我想创建第二个列表来保存货币和在它们之间反转的按钮。 第一个列表应该像第二个列表一样包含 USD、EUR、GBP。 反向按钮将在列表之间互换。
现在我只能从欧元转换,我希望能够在任何货币之间转换。
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