随机枚举作为参数

Question

创建枚举后，我想分配一个随机值并将其作为参数发送给函数，但我遇到了麻烦。

public enum TGate
{
  A, B, C, D
}
public class Parking
{
  TGate gate;
  gate=TGate.C;
  public Parking(TGate gate) 
  {
    switch gate.....
  }
}

我希望有人能帮助我。由于

Answer 1

你可以这样写:

 TGate gate;
 gate = TGate.values()[(int)(Math.random()*TGate.values().length)];

Answer 2

您可以这样尝试:

public class Example {
    public static void main(String[] args) {
        new Parking(TGate.values()[(int) (Math.random() * TGate.values().length)]);
    }
}
enum TGate {
  A, B, C, D
}
class Parking {
    private final TGate gate;
    public Parking(TGate gate) {
        this.gate = gate;
    }
}