java - 如何在 Java 中从没有所有值的枚举创建对象

Question

我有一个名为 PaymentFrequency 的枚举:

public enum PaymentFrequency {

  D("Daily"),
  W("Weekly"),
  M("Monthly"),
  Y("Yearly");

  private final String description;

  PaymentFrequency(final String description) {
    this.description = description;
  }

  public String getDescription() {
    return description;
  }
}

现在如果我在我的 bean 中这样做:

private PaymentFrequency[] paymentPeriods = PaymentFrequency.values();

public PaymentFrequency[] getPaymentPeriods() {
  return paymentPeriods;
}

public void setPaymentPeriods(PaymentFrequency[] paymentPeriods) {
  this.paymentPeriods = paymentPeriods;
}

我将从枚举中获取所有值。如何仅获取值 W 和 M ？

Answer 1

嗯，你可以这样做

 private PaymentFrequency[] paymentPeriods = 
     new PaymentFrequency[] {PaymentFrequency.W, PaymentFrequency.M};