Java Programming File Exceptions Develop, Implement and test a class that reads

Question

Java Programming

File Exceptions

Develop, Implement and test a class that reads an array of String from a file. The class should have a method void getStrings()

which reads from the file, and catches in order: FileNotFoundException (handled by printing “Error – file not found”), EOFException (handled by printing “Done reading file”), and IOException (handled by printing “Problem reading file” + e.getMessage()). Use a finally block to close the file.

Requirements

Design all classes.

Implement the class.

Test the complete implementation.

Submission:

The class diagram.

The Java code for class.

Your test: including test data, test cases, and test results

Explanation / Answer

ReadStrings.java

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;

public class ReadStrings {

   public static void main(String[] args) {
      
       getStrings();
   }
   public static void getStrings() {
       Scanner sc = null;
       try{
       sc = new Scanner(new File("D:\strings.txt"));
       List<String> lines = new ArrayList<String>();
       while (sc.hasNextLine()) {
           String s = sc.nextLine();
       lines.add(s);
       System.out.println(s);
       }

       String[] arr = lines.toArray(new String[0]);
       System.out.println(Arrays.toString(arr));
       }
       catch(FileNotFoundException f){
           System.out.println("Error – file not found");
       }
       catch(IOException e){
           System.out.println("Problem reading file" + e.getMessage());
       }
       finally {
           sc.close();
       }
   }
}

Output:

aaaa
bbbb
cccc
dddd
eeee
[aaaa, bbbb, cccc, dddd, eeee]

strings.txt

aaaa
bbbb
cccc
dddd
eeee

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