[英]How to compare 2 Field Text with each other in Javafx
我在BankAccount類中有2個字段文本,其中1個用於存款,1個用於提取。
這兩個字段文本僅采用雙精度值:
TextField depositInput = new TextField();
TextField withdrawInput = new TextField();
和一個按鈕來執行這些字段文本(可以是兩個)。
Button button = new Button("Execute");
問題是我不知道如何告訴Java已執行哪個TextField。 由於我想在用戶想要存入或提取時顯示不同的消息:
例如:
if(FieldText executed is deposit){
println("User deposits X amount");
double depositAmount = X;
}
if(FieldText executed is withdraw){
println("User withdraws X amount");
double withdrawAmount = -X;
}
我努力了:
if(FieldText == depositInput){
}
但是Java向我顯示了一個錯誤。
如果我的問題正確,最簡單的解決方案是僅在按下按鈕時檢查文本字段的值是否為空:
TextField depositInput = new TextField();
TextField withdrawInput = new TextField();
Button button = new Button("Execute");
button.setOnAction((event) -> {
if (!depositInput.getText().isEmpty() && !withdrawInput.getText().isEmpty()) {
System.out.println("Deposit&Withdrawal");
} else if (!depositInput.getText().isEmpty()) {
System.out.println("Deposit");
} else if (!withdrawInput.getText().isEmpty()) {
System.out.println("Withdrawal");
}
});
如果您正在使用JavaFX和場景構建器
@FXML
private PasswordField PASSWORD;
@FXML
private PasswordField REPASSWORD;
void validateFields(ActionEvent event) {
if (PASSWORD.getText() == null ? REPASSWORD.getText() != null : !PASSWORD.getText().equals(REPASSWORD.getText()) ){
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Warning");
alert.setHeaderText("PASSWORD ERROR");
alert.setContentText("CHECK YOUR PASSWORDS . "
+ "\nPlease try again.");
alert.showAndWait();
}
}
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