Someone please explain this java code. Thanks in advance

import java.util.*;
import java.io.*;
class Formula1Driver extends Driver{
	String name,team;
	int race,points;
	int fp,sp,tp,fop,fip,sip,sep,eip,nip,tep=0;//fp=first position sp=second position tp=third position fop=fourth position fip=fifth position sip=sixth position sep=seventh position eip=eighth position nip=ninth position tep=tenth position
	int total;
	HashMap<String, String> driverdetails = new HashMap<String, String>();
	HashMap<String,Integer>driverpoints=new HashMap<String,Integer>();
	 
	
	public void setDetails(String name,String team)
	{
		this.name=name;
		this.team=team;
		driverdetails.put(team, name);
		
	}
	

	public void getDetails()
	{
		System.out.println("Do you want to see the details");
		Scanner s=new Scanner(System.in);
		String rep=s.nextLine();
		if(rep.equals("yes"))
		{
		System.out.println(driverdetails);
		}
	}
	
public void deleteDetails(String dteam)
{
	this.team=team;
	driverdetails.remove(dteam);
	System.out.println(driverdetails);
}

public void changeDetails(String rname,String rteam)
{
	this.name=rname;
	this. team=rteam;
	driverdetails.replace(team,name);
	System.out.println(driverdetails);
}

public void setPoints(int race)
{
	this.race=race;
	
String[][]driverposition=new String[driverdetails.size()][race+2];
	for (String i : driverdetails.values()) {
      System.out.println("Enter the points for "+i);
	  for(int j=0;j<race;++j)
	  {
		  Scanner s=new Scanner(System.in);
		  points=s.nextInt();
		  if(points==25)
		  {
			  fp=fp+1;
			 total=total+points;
		  }else if(points==18)
		  {
			  sp=sp+1;
			  total=total+points;
		  }else if(points==15)
		  {
			  tp=tp+1;
			  total=total+points;
		  }else if(points==12)
		  {
			 fop=fop+1;
			 total=total+points;
		  }else if(points==10)
		  {
			  fip=fip+1;
			  total=total+points;
		  }else if(points==8)
		  {
			  sip=sip+1;
			  total=total+points;
		  }else if(points==6)
		  {
			  sep=sep+1;
			  total=total+points;
		  }else if(points==4)
		  {
			  eip=eip+1;
			  total=total+points;
		  }else if(points==2)
			  
		  {
			  nip=nip+1;
			  total=total+points;
		  }else{
			  tep=tep+1;
			  total=total+points;
			  
		  }
	  driverpoints.put(i,total);
	 
	  }
    }
	for (String j : driverpoints.keySet()) {
  System.out.println("Driver " + i + " points " +driverpoints.get(j));
}
}
public void saveFile()
{
	File myFile = new File("Data.txt");
		if (myFile.exists()) {
			System.out.println(myFile.getName() + " exists");
			System.out.println("The file is " + myFile.length() + " bytes long");
			if (myFile.canRead())
				System.out.println(" ok to read");
			else
				System.out.println(" not ok to read");
			if (myFile.canWrite())
				System.out.println(" ok to write");
			else
				System.out.println(" not ok to write");
			System.out.println("path: " +myFile.getAbsolutePath());
			System.out.println("File Name: "+ myFile.getName());
			System.out.println("File Size: "+ myFile.length() + " bytes");
		} else
			System.out.println("File does not exist");
	}
}
}