Write a program which reads array elements from a file and then searches value e

Question

Write a program which reads array elements from a file and then searches value entered from the keyboard in the array. Use arrayListType Sequential search function.

template <class elemType>

int arrayListType<elemType>::seqSearch(const elemType& item) const

{

    int loc;

    bool found = false;

    for (loc = 0; loc < length; loc++)

        if (list[loc] == item)

        {

            found = true;

            break;

        }

    if (found)

        return loc;

    else

        return -1;

}

Explanation / Answer

Answer :

import java.io.*;
import java.util.*;
class Texts
{
  
public static void main(String args[])
{
  
   Integer searchKey = new Integer("5"); //hardcoded
    readIntegers();
   sequentialSearch (arrList, searchKey);

}
static void readIntegers()
{
Integer[] array = new Integer[1000];
int i = 0;
     
Scanner input = new Scanner(System.in);
  
System.out.print("Enter the file name with extention to read array values : ");
File file = new File(input.nextLine());
  
Scanner inputFile = null;
try
   {
       inputFile = new Scanner(file);
   }

   catch (Exception e)
   {
       System.out.println("File not found!");
   }
    if (inputFile != null)
   {
       System.out.print("number of integers in file ""+ file + "" = ");

       try
       {
           while (inputFile.hasNext())
           {
               if (inputFile.hasNextInt())
               {
                   array[i] = inputFile.nextInt();
                   i++;
               }
               else
               {
                   inputFile.next();
               }
           }
       }
       finally
       {
           inputFile.close();
       }
  
       System.out.println(i);
       for (int v = 0; v < i; v++)
       {
           System.out.printf("array[%d] = %d ", v, array[v]);
          

       
       }
  
ArrayList<Integer> arrList = new ArrayList<Integer>(Arrays.asList(array));
  
      
   }
}
   public static <T> boolean sequentialSearch (Iterable<T> collection, T searchKey)
{
Iterator<T> iter = collection.iterator( );
while (iter.hasNext())
{
if (iter.next( ).equals(searchKey))
{
return true;
}
}
return false;
}  
  
}

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