<identifier> expected, arrayList

Question

I'm having trouble with some java code. The program consists of about 7 files, but I will try to keep it short.

I'm trying to load an ArrayList from a file into a variable, with ObjectStream. It gave me a warning, because all the compiler could see, was that I said an Object should be casted to ArrayList. of course the compiler won't know what kind of object there is in the file. As the coder I know that the file can only consist of one ArrayList and nothing else. So I searched the web, and found out to supress the warning, nut now it give me the error:

Schedule.java:34: error: <identifier> expected

To give you a picture of what's happening, here is the code the error happens in. This error shouldn't be affected by any of the other classes

import java.util.*;
import java.io.*;


public class Schedule
{
    private static ArrayList<Appointment> schedule; 
    private static File file;

    private static ObjectInputStream objIn;
    private static boolean exit;
    private static Scanner in = new Scanner(System.in);

    public static void main(String[] args)
    {
        initializeSchedule();
        System.out.println("Welcome!");
        while(!exit){
            System.out.print("write command: ");
            Menu.next(in.next());
        }
    }

    public static void initializeSchedule()
    {
        try{
            file = new File("Schedule.ca");
            if(!file.exists()){
                schedule = new ArrayList<Appointment>();
            }
            else{
                objIn = new ObjectInputStream(new FileInputStream("Schedule.ca"));
                @SuppressWarnings("unchecked")
                schedule = (ArrayList<Appointment>)objIn.readObject();  
                objIn.close();
            } 
        } catch (IOException e){
            System.out.println("Exception thrown  :" + e);
        } catch (ClassNotFoundException e){
                System.out.println("Exception thrown  :" + e);
        }   
    }

    public static void exit()
    {
        exit = true;
    }

    public static ArrayList<Appointment> getSchedule()
    {
        return schedule;
    }

}

the error is in initializeSchedule, right under the supression, where schedule is set to the ObjectStream input.

It will work if you annotate the whole method.

Marko Topolnik
– Marko Topolnik

2013-12-08 10:44:09 +00:00
Commented Dec 8, 2013 at 10:44 — Marko Topolnik
– Marko Topolnik, Commented Dec 8, 2013 at 10:44

TwoThe · Accepted Answer · 2013-12-08 10:46:55Z

2

The correct locations for @SuppressWarnings("unchecked") are

TYPE, FIELD,METHOD,PARAMETER,CONSTRUCTOR,LOCAL_VARIABLE

So the compiler cannot parse @SuppressWarnings at this point, but considers it a statement. If you move it above the method declaration or above the declaration of schedule, it should be fine.

A better way to fix that is to actually correct the issue that the compiler is complaining about like this:

final Object input = objIn.readObject();
if (input instanceof ArrayList) {
  schedule = (ArrayList<Appointment>) input;
} else {
  throw new IllegalStateException(); // or whatever suits you
}

answered Dec 8, 2013 at 10:46

TwoThe

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Comments

Ingo · Accepted Answer · 2013-12-08 10:43:09Z

1

You can't annotate an assignment. Move the

@SuppressWarnings("unchecked")

to the line before the method starts.

answered Dec 8, 2013 at 10:43

Ingo

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