我有一个按钮，我想添加一个功能，用户可以使用他们的键盘来控制程序。例如，如果他们按下键盘上的按钮0，我的计算器上的文本字段应显示0.我到目前为止尝试过，但它无法正常工作。请帮忙。
我将textField设置为disabled，因为如果我不这样做会破坏我的应用程序。
这是我的FXML：
`<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="241.0" prefWidth="362.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="calculator.FXMLDocumentController">
<children>
<GridPane prefHeight="241.0" prefWidth="362.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Button fx:id="buttonZero" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="0" GridPane.columnSpan="2147483647" GridPane.rowIndex="4" GridPane.rowSpan="2147483647" />
<TextField fx:id="textField" alignment="CENTER_RIGHT" GridPane.columnSpan="2147483647" />
<Button fx:id="decimalButton" minHeight="30.0" minWidth="50.0" text="." GridPane.columnIndex="1" GridPane.rowIndex="4" />
<Button fx:id="equalsButton" minHeight="30.0" minWidth="50.0" onAction="#equalAction" text="=" GridPane.columnIndex="2" GridPane.rowIndex="4" />
<Button fx:id="addButton" minHeight="30.0" minWidth="50.0" onAction="#addAction" text="+" GridPane.columnIndex="3" GridPane.rowIndex="4" />
<Button fx:id="piButton" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="π" GridPane.columnIndex="4" GridPane.rowIndex="4" />
<Button fx:id="subtractButton" layoutX="154.0" layoutY="212.0" minHeight="30.0" minWidth="50.0" text="-" GridPane.columnIndex="3" GridPane.rowIndex="3" />
<Button fx:id="multiplyButton" minHeight="30.0" minWidth="50.0" text="*" GridPane.columnIndex="3" GridPane.rowIndex="2" />
<Button fx:id="divideButton" minHeight="30.0" minWidth="50.0" text="/" GridPane.columnIndex="3" GridPane.rowIndex="1" />
<Button fx:id="buttonOne" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="1" GridPane.rowIndex="3" />
<Button fx:id="buttonTwo" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="2" GridPane.columnIndex="1" GridPane.rowIndex="3" />
<Button fx:id="buttonThree" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="3" GridPane.columnIndex="2" GridPane.rowIndex="3" />
<Button fx:id="buttonFour" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="4" GridPane.rowIndex="2" />
<Button fx:id="buttonFive" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="5" GridPane.columnIndex="1" GridPane.rowIndex="2" />
<Button fx:id="buttonSix" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="6" GridPane.columnIndex="2" GridPane.rowIndex="2" />
<Button fx:id="buttonSeven" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="7" GridPane.rowIndex="1" />
<Button fx:id="buttonEight" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="8" GridPane.columnIndex="1" GridPane.rowIndex="1" />
<Button fx:id="buttonNine" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="9" GridPane.columnIndex="2" GridPane.rowIndex="1" />
<Button fx:id="clearButton" minHeight="30.0" minWidth="50.0" onAction="#clearAction" text="C" GridPane.columnIndex="4" GridPane.rowIndex="2" />
<Button fx:id="buttonE" minHeight="30.0" minWidth="50.0" onAction="#digitAction" text="e" GridPane.columnIndex="4" GridPane.rowIndex="3" />
</children>
</GridPane>
<Label fx:id="label" layoutX="126" layoutY="120" minHeight="16" minWidth="69" />
</children>
</AnchorPane>
`
这是我的FXML控制器：
public class FXMLDocumentController implements Initializable{
@FXML
TextField textField;
double currentNumber;
@FXML
private void digitAction(ActionEvent event) {
if (((Button) event.getSource()).getText().equals("π")) {
String pi = "3.14159265359";
String oldText = textField.getText();
String newText = pi + oldText;
textField.setText(newText);
}
else if (((Button) event.getSource()).getText().equals("e")){
String e = "2.71828182846";
String oldText = textField.getText();
String newText = e + oldText;
textField.setText(newText);
}
else {
String digit = ((Button) event.getSource()).getText();
String oldText = textField.getText();
String newText = oldText + digit ;
textField.setText(newText);
}
}
@FXML
private void clearAction (ActionEvent event) {
textField.setText("");
}
@FXML
private void addAction (ActionEvent event) {
String currentText = textField.getText();
currentNumber = Double.parseDouble(currentText);
textField.setText("");
textField.requestFocus();
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// here is my issue Can you see the problem?
textField.setDisable(true);
textField.setOnKeyPressed(ke-> {
if (ke.getCode().equals(KeyCode.DIGIT0))
{
// textfield will not be set to x
textField.setText("0");
}
else if (ke.getCode().equals(KeyCode.DIGIT1))
{
textField.setText("1");
}
else if (ke.getCode().equals(KeyCode.DIGIT2))
{
textField.setText("2");
}
else if (ke.getCode().equals(KeyCode.DIGIT3))
{
textField.setText("3");
}
else if (ke.getCode().equals(KeyCode.DIGIT4))
{
textField.setText("4");
}
else if (ke.getCode().equals(KeyCode.DIGIT5))
{
textField.setText("5");
}
else if (ke.getCode().equals(KeyCode.DIGIT6))
{
textField.setText("6");
}
else if (ke.getCode().equals(KeyCode.DIGIT7))
{
textField.setText("7");
}
else if (ke.getCode().equals(KeyCode.DIGIT8))
{
textField.setText("8");
}
else if (ke.getCode().equals(KeyCode.DIGIT9))
{
textField.setText("9");
}
});
}
}