FileManage.java [in progress]

package com.mycompany.rubrica;
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.BufferedReader;
import java.io.IOException;
/**
 *
 * @author alessio
 */
public class FileManage
{
    private static String path = "rubrica.txt";

    public static void stampaSuFile(String strObj) throws IOException
    {
        FileWriter writer = new FileWriter(path, true);

        try
        {
            writer.write(strObj + "\n\n");
        }
        catch (FileNotFoundException exc)
        {
            System.out.println("\nFile non trovato.");
        }
        finally
        {
            writer.close();
        }
    }

    public static boolean cercaStringa(String stringa) throws IOException
    {
        File file = new File(path);
        Scanner reader = new Scanner(file);

        while (reader.hasNext())
        {
            if ((reader.next().equals(stringa)) || (reader.next().contains(stringa)))
            {
                return true;
            }
        }

        return false;
    }

    public static boolean cancellaRighe(String stringa) throws IOException
    {
        File file = new File(path);
        Scanner reader = new Scanner(file);
        FileWriter writer = new FileWriter(file);
        HashMap<Integer, String> righe = new HashMap();
        int i = 0;

        while (reader.hasNext())
        {
            righe.put(i, reader.nextLine());
            i++;
            if (stringa.equals(reader.nextLine))
            {
                righe.remove(i);
            }
        }

        for (String riga : righe)
        {
            writer.write()
        }

        return false;

    }

    public static int svuotaFile() throws IOException
    {
        File file = new File(path);
        FileWriter writer = new FileWriter(file);
        writer.write("");

        return 0;
    }

    public static void leggiFile() throws IOException
    {
        File file = new File(path);
        Scanner reader = new Scanner(file);

        while (reader.hasNext())
        {
            System.out.print(reader.nextLine() + "\n");
        }
    }
}