复制其他对象值的构造函数。

This is my Class:

这是我的类:

public class City
{
    private String _cityName;
    private Point _cityCenter;
    private Point _centralStation;
    private long _numOfResidents;
    private int _noOfNeighborhoods;
    private final long RESIDENTS_CONST_VALUE = 0;
    private final int NEIGHBORHOODS_CONST_VALUE = 1;
}
public class City