Nsryjdtyk

I'm getting an error using the method readFile which I used in the class RunProgram.

The error I'm getting is:

RunProgram.java uses unchecked or unsafe operations.

The code of my RunProgram class is:

 import java.util.ArrayList;



 public class RunProgram{        

  public static void main(String  args){



    String  namen = Input.geefInputNamen();



    ArrayList<Spelers> spelerDatabase = new ArrayList<Spelers>();

    spelerDatabase = FileReader.readFile("Player Database");    

   }

 }

The method readFile is defined in the code below:

 import java.io.*;

 import java.util.ArrayList;



 public class FileReader {



  public static ArrayList readFile(String naamvdfile) {

    ArrayList<Spelers> spelerDatabase = new ArrayList<Spelers>();   

   try {

int LineNr = 4;         

File aFile = new File (naamvdfile+ ".xlsx");

    BufferedReader aBr = new BufferedReader(new java.io.FileReader(aFile));                    

 String aLine ="";  

    while (aLine !=> null) {

            aLine = aBr.readLine();

            if (aLine != null) {

                String  lineParts = aLine.split(";", -1);

                if (lineParts.length == 10) {



                    int overall = Integer.parseInt(lineParts[1]);

                    int shootMid = Integer.parseInt(lineParts[4]);

                    int shootDis = Integer.parseInt(lineParts[5]);

                    int defence = Integer.parseInt(lineParts[6]);

                    int rebounden = Integer.parseInt(lineParts[7]);

                    int playmaker = Integer.parseInt(lineParts[8]);

                    int atletisch = Integer.parseInt(lineParts[9]);



                    Spelers speler = new Spelers(lineParts[0], overall, 

                       lineParts[2], lineParts[3], shootMid, shootDis, 

                       defence, rebounden, playmaker, atletisch);

                    spelerDatabase.add(speler);

                }

                else System.out.println("Lijn " + LineNr +" is niet volledig 

                                       ingevuld!");

                LineNr++;

            }       

    }           

  System.out.println("Aantal spelers dat we inlazen: " + LineNr); 

   }        

 catch (Exception e) { }        

 return spelerDatabase;     

    } 

  }

This last code doesn't give an error while compiling.

Change the function return type to ArrayList<Spelers> in the below function in FileReader class :

  public static ArrayList<Spelers> readFile(String naamvdfile) {

    ...

The RunProgram class is expecting an ArrayList<Spelers> whereas the method signature tells it that the return type is an untyped ArrayList.

You get an unchecked warning because readFile() returns an ArrayList while you save it to an object of type ArrayList<Spelers>. Simply change the return type of the method.

public static ArrayList<Spelers> readFile(String naamvdfile) {

    ....

}