Question

package mp1practice;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Driver 
{    
    ArrayList<String> arraylist = new ArrayList<String>();

    public void GrabData() {

        try {
            BufferedReader br = new BufferedReader(new FileReader("data/Catalog.txt"));
        }catch (FileNotFoundException ex) {
            Logger.getLogger(Driver.class.getName()).log(Level.SEVERE, null, ex);
    }
  }        
}

Hello , i have a very basic question regarding try and catch , I am getting an error saying unreported exception. must be caught or declared to be thrown. Any ideas?

SOLVED!!

Answer 1

The simplest change is to place the code in a initialiser block.

public class Driver {
    private final List<String> arraylist = new ArrayList<String>();
    {
        try {
            BufferedReader br = new BufferedReader(new FileReader("data/Catalog.txt"));
        } catch (FileNotFoundException ex) {
            Logger.getLogger(Driver.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

but what would be more useful would be expicit and set a field.

public class Driver    {
    private final List<String> arraylist = new ArrayList<String>();
    private final BufferedReader br;

    public Driver() throws FileNotFoundException {
        br = new BufferedReader(new FileReader("data/Catalog.txt"));
    }