package accountNumber;
 
import java.util.Scanner;
import java.io.*;
import java.util.ArrayList;
 
public class AccountNumber{
public static void main(String[] args) throws IOException
{
	ArrayList<String> accountList = new ArrayList<String>();
 
	Scanner keyboard = new Scanner(System.in);
 
	System.out.print("Enter the filename: ");
	String filename = keyboard.nextLine();
 
	File file = new File(filename);
	Scanner inputFile = new Scanner(file);
 
	while (inputFile.hasNext())
	{
		String account = inputFile.nextLine();
		accountList.add(account);
	}
 
	inputFile.close();
 
	for (int index = 1; index < accountList.size(); index++)
	{
		System.out.println("Index: " + index + " Account: " +
							accountList.get(index));
	}
 
/** [ 	- Syntax error on token ")", ; expected
	- Syntax error on token "(", ; expected
	- Illegal modifier for parameter isValid; only final is permitted
	- Syntax error on token ",", ; expected
	- ArrayList is a raw type. References to generic type ArrayList<E> should be 
	 parameterized ] */
 
	public static boolean isValid(ArrayList AccountList, String target)
	{
	String test = filename;
 
/** [ - The method sequentialSearch(Scanner, String) is undefined for the type 
	 AccountNumber
	- Duplicate local variable target ] */
 
    int target = sequentialSearch(inputFile, filename);
 
    if (target == -1)
    {
       System.out.println("Invalid account number.");
    }
    else
    {
       System.out.println("Account number is valid." + (target + 1));
    }
 }
 
 /**
    The sequentialSearch method searches an array for
    a value.
    @param array The array to search.
    @param value The value to search for.
    @return The subscript of the value if found in the
            array, otherwise -1.
 */
 
**/ [- Syntax error on token ",", ; expected
	- Syntax error on token ")", delete this token
	- Duplicate local variable filename
	- Illegal modifier for parameter sequentialSearch; only final is 
	 permitted
	- Duplicate local variable inputFile
	- Syntax error on token "(", ; expected ] */
	public static int sequentialSearch(int[] inputFile,int filename);
 {
    int index;        // Loop control variable
    int element;      // Element the value is found at
    boolean found;    // Flag indicating search results
 
    // Element 0 is the starting point of the search.
    index = 0;
 
    // Store the default values element and found.
    element = -1;
    found = false;
 
    // Search the array.
    while (!found && index <inputFile.length)
    {
       if (inputFile[index] == filename)
       {
          found = true;
       }
       index++;
    }
 }
}
}

[ The method sequentialSearch(Scanner, String) is undefined for the type AccountNumber ]

sequentialSearch(inputFile, filename);

package assignment8;
 
import java.util.Scanner;
import java.io.*;
import java.util.ArrayList;
 
public class Assignment8{
public static void main(String[] args) throws IOException
{
	ArrayList<String> accountList = new ArrayList<String>();
 
	Scanner keyboard = new Scanner(System.in);
 
	System.out.print("Enter the filename: ");
	String filename = keyboard.nextLine();
 
	File file = new File(filename);
	Scanner inputFile = new Scanner(file);
 
	while (inputFile.hasNext())
	{
		String account = inputFile.nextLine();
		accountList.add(account);
	}
 
	inputFile.close();
 
	for (int index = 0; index < accountList.size(); index++)
	{
		System.out.println("Index: " + index + " Account: " +
							accountList.get(index));
	}
 
	**/ take out this and the program reads out the files and only leaves the searching for specific file part to do./*
public static boolean isValid(ArrayList AccountList, String target)
	{
 
	}
}
}
 

/**
   This program sequentially searches an
   int array for a specified value.
*/
 
public class SearchArray
{
   public static void main(String[] args)
   {
      int[] tests = { 87, 75, 98, 100, 82 };
      int results;
 
      // Search the array for the value 100.
      results = sequentialSearch(tests, 100);
 
      // Determine whether 100 was found and
      // display an appropriate message.
      if (results == -1)
      {
         System.out.println("You did not " +
                    "earn 100 on any test.");
      }
      else
      {
         System.out.println("You earned 100 " +
                    "on test " + (results + 1));
      }
   }
 
   /**
      The sequentialSearch method searches an array for
      a value.
      @param array The array to search.
      @param value The value to search for.
      @return The subscript of the value if found in the
              array, otherwise -1.
   */
 
   public static int sequentialSearch(int[] array,
                                      int value)
   {
      int index;        // Loop control variable
      int element;      // Element the value is found at
      boolean found;    // Flag indicating search results
 
      // Element 0 is the starting point of the search.
      index = 0;
 
      // Store the default values element and found.
      element = -1;
      found = false;
 
      // Search the array.
      while (!found && index < array.length)
      {
         if (array[index] == value)
         {
            found = true;
            element = index;
         }
         index++;
      }
 
      return element;
   }
}

package assignment8;
 
import java.util.Scanner;
import java.io.*;
import java.util.ArrayList;
 
public class Assignment8{
public static void main(String[] args) throws IOException
{
	ArrayList<String> accountList = new ArrayList<String>();
 
	Scanner keyboard = new Scanner(System.in);
 
	System.out.print("Enter the filename: ");
	String filename = keyboard.nextLine();
 
	File file = new File(filename);
	Scanner inputFile = new Scanner(file);
 
	while (inputFile.hasNext())
	{
		String account = inputFile.nextLine();
		accountList.add(account);
	}
 
	inputFile.close();
 
	for (int index = 0; index < accountList.size(); index++)
	{
		System.out.println("Index: " + index + " Account: " +
							accountList.get(index));
	}
}
 
 
	/** [ Multiple markers at this line
	- This method must return a result of type boolean
	- ArrayList is a raw type. References to generic type ArrayList<E> should be 
	 parameterized ]  I understand why I got the return error, but I'm not sure how to go about keeping the header the way the instructor wants while following the example and making the program work. I remember bout the raw type part as well. */
 
public static boolean isValid(ArrayList AccountList, String target)
	{
		Scanner keyboard = new Scanner(System.in);
 
		System.out.println("Enter your account number : ");
		String accountNumber = keyboard.nextLine();
 
		int valid;
 
		valid = sequentialSearch(target, accountNumber);
 
		if (valid == -1)
		{
			System.out.println("You did not enter a valid account number");
		}
		else
		{
			System.out.println("Your account number has been verified");
		}
	}
 
 
	public static int sequentialSearch(String array, String file)
	{
		int index;
		int element;
		boolean valid;
 
		index = 0;
 
		element = -1;
		valid = false;
 
		while (!valid && index < array.length())
			{
 
/** [The type of the expression must be an array type but it resolved to String ]  referring to the array[index] of the following if statement */
 
				if (array[index] == file)
				{
					valid = true;
					element = index;
				}
				index++;
			return element;			   
		}
	}
}

public static boolean valid(ArrayList AccountList, String target)
	{
    // check to see if the number is valid
        if (isValid(AccountList, target) == true )
            {
            System.out.println("That number is valid.");
            }
        else {
            System.out.println("That number is invalid.");
        }
            return true;
        }		   
 
	public static boolean isValid(ArrayList AccountList, String target)
		{
			int index;
			int element;
			boolean valid;
 
			index = 0;
 
			element = -1;
			valid = false;
 
			Scanner keyboard = new Scanner(System.in);
			System.out.print("Please enter an account number: ");
	        // get the number from the user
	        int accountNumber = keyboard.nextInt();
 
			while (!valid && index < AccountList.size())
				{
/** Error says that "filename" is undefined, but it is in the main function. I don't know. */
					if (filename(accountNumber) == true)
					{
						valid = true;
						element = index;
					}
					index++;
 
				return valid;
				}
			}
		}