java - 如何在 lblText.steText() 中设置预定义消息

Question

我想从 personAge 方法中抛出异常的地方获取字符串消息，以便它显示一个人的定义错误。 如何从 throw new Invalid..("the message"); 获取消息

标签？

这是我的 Controller 中的代码

 @FXML
void btnRegister(ActionEvent event) {
    String name = txtName.getText();
    String email = txtEmail.getText();
    String phonenr = txtPhonenr.getText();
    int year = Integer.parseInt(txtYear.getText());
    int month = Integer.parseInt(txtMonth.getText());
    int day = Integer.parseInt(txtDay.getText());

    boolean validateName = PersonValidator.checkName(name);
    boolean validateEmail = PersonValidator.checkEmail(email);
    boolean validatePhonenr = PersonValidator.checkPhonenr(phonenr);
    try{

        PersonAge.personAge(year);
    }catch (InvalidAgeException msg){
        lblResult.setText(msg);
    }

}

这就是抛出异常的地方:

public class PersonAge  {
public static int personAge(int year) throws InvalidAgeException {
    Date date = new Date();
    Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("Europe/Norway"));
    cal.setTime(date);
    int thisYear = cal.get(Calendar.YEAR);
    int age = thisYear - year;

    if(age <=0 || age > 120){
        throw new InvalidAgeException("Age is invalid! Try again");
    }
    return age;
}

}

Answer 1

您只需要在异常上调用 getMessage() 即可:lblResult.setText(msg.getMessage());