读取文件时未返回正确的值。返回“null”

问：

我正在读取 csv 文件，我有两个对象。第一个对象称为 Project，另一个对象称为 Location。

public class Project
{
    private String province;
    private String beneficiary;
    private String beneficiaryNum;
    private String assetClass;
    private String name;
    private String stage;
    Location location;

public Project(String pProvince, String pBeneficiary, String pBeneficiaryNum, String pAssetClass, String pName, String pStage, Location pLocation)
    {
        province = pProvince;
        beneficiary = pBeneficiary;
        beneficiaryNum = pBeneficiaryNum;
        assetClass = pAssetClass;
        name = pName;
        stage = pStage;
    }

public String toString()
    {
        return province + "\n" + beneficiary + "\n" + beneficiaryNum + "\n" + assetClass + "\n" + name + "\n" + stage + "\n" + location;
    }
...

public class Location
{
    private double latitude;
    private double longitude;
    private String coordinateSystem;

public Location(double pLatitude, double pLongitude, String pCoordinateSystem)
    {
        latitude = pLatitude;
        longitude = pLongitude;
        coordinateSystem = pCoordinateSystem;
    }

public String toString()
    {
        return latitude + "\n" + longitude + "\n" + coordinateSystem;
    }
...

问题出在方法 processLine（） 中

public static Project processLine(String pLine)
    {

        String[] lineSplit;
        lineSplit = pLine.split(",");
        
        //Converts the string in lineSplit[7] into a Double called 'lat'
        Double lat = Double.valueOf(lineSplit[7]);

        //Converts the string in lineSplit[8] into a Double calle 'lon'
        Double lon = Double.valueOf(lineSplit[8]);

        //Creates a new location object
        Location pLocation = new Location(lat, lon, lineSplit[9]);
        Project pProject = new Project(lineSplit[0],lineSplit[1],lineSplit[2],lineSplit[3],lineSplit[4],lineSplit[6],pLocation);

        return pProject;
        
    }

当我返回pProject并尝试打印它时，它会打印出来

//below is lineSplit[0,1,2,3,4,6]
Saskatchewan
All Nations Healing Hospital
9999
Health
Design and construction of a new community health facility.
Completed
//below is pLocation
null

我试图隔离pLocation并打印它，它返回

//pLocation
50.761877 //lat
-103.787043 //lon
GCS_North_American_1983_CSRS //lineSplit[9]

但是当我尝试打印出pProject时，将pLocation作为字段，它打印出null

如何让它打印出带有 pLocation 的 pProject？

我是提问的新手，所以如果我以错误的方式陈述了任何事情，或者没有提供足够的信息，请告诉我，这样我就可以提供信息并改进:)