我有三个领域，即

1. 1号
2. 2号
3. 时间

我试图在Java中编写一个函数，为上述字段返回唯一的哈希值（ 长期需要是hash的返回类型
）。然后，此哈希将用于在HashSet中存储与上述字段相对应的数据库行。我是编写哈希码函数的新手，有人可以复习一下我的内容。

public class HashCode {

    private long Number1;
    private long Number2;
    String Time;

    public HashCode(long Number1, long Number2, String Time){
        this.Number1 = Number1;
        this.Number2 = Number2;
        this.Time = Time;
    }

    public long getHashCode() {
        long hash = 3;
        hash = 47 * hash + (long) (this.Number1 ^ (this.Number1 >>> 32));
        hash = 47 * hash + (long) (this.Number2 ^ (this.Number2 >>> 32));
        hash = 47 * hash + (this.Time != null ? this.Time.hashCode() : 0);
        return hash;
    }
}