Question

package Lab11;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class Lab10 {
   public static void main (String [] args)
   {
   // ============================================================
   // Step 2. Declaring Variables You Need

   // These constants are used to define 2D array and loop conditions
   final int NUM_ROWS = 4;
   final int NUM_COLS = 3;
           String filename = "Input.txt";
   // A String variable used to save the lines read from input file
   // -->

   // ============================================================
   // Step 3. Declare the Array for File Input
   // Please involve the two constants NUM_ROWS and NUM_COLS in the
   // constructor.
   // -->

   // ============================================================
   // Step 4: Preparing an Input File
   //
   // Make a text file and write 12 strings in it, one string in each line,
   // and then save it in the folder where your Lab10.java is.
   //
   // Note: If you are using Eclipse, please save the file out of "src"
   // folder.
   //
   // !!!!! NO CODE REQUIRED IN THIS SECTION !!!!!

   // ============================================================
   // Step 5. Reading the File
   // (Please make sure your input file is prepared in Step 4)
  
   // try-catch statement handles the exception (runtime error)
   //
   // There are two Exceptions might occur when reading a file
   //
   // - FileNotFoundException: thrown by FileReader when the file doesn't exist
   // - IOException: thrown by BufferedReader's readLine() when some I/O error occurs
   //
   // Please check the textbook for details
   try
   {
   // Instantiate a FileReader object to open the input file
   // Note: "filename" should match the input file you made in Step 4
              
   //FileReader fr = new FileReader(filename);
   FileReader fr = new FileReader("/autograder/submission/" + filename);
              
   // BufferedReader is for efficient reading of characters
   BufferedReader bfReader = new BufferedReader(fr);
  
   // Just like scanner.nextLine(), whenever you invoke .readLine()
   // on BufferedReader, it will read a single line from the file.
   //
   // As we have determined the number of lines in our file, we will
   // use constants to define the loop conditions
   for (int i = 0; i <= NUM_ROWS - 1; i++)
   {
   for (int j = 0; j <= NUM_COLS - 1; j++)
   {
   // Read a line from the file
   // Please invoke .readLine() on the BufferedReadere bfReader
   // and save the returned value to the element at array position (i, j)
   // -->
   }
   }

   // It is very important to close your file after reading is done
   bfReader.close();
   }
   catch (FileNotFoundException e)
   {
   System.err.println("File not found");
   }
   catch (IOException e)
   {
   System.err.println("I/O error occurs");
   }

   // ============================================================
   // Step 6. Print the Elements in the 2D Array

   for (int i = 0; i <= NUM_ROWS - 1; i++)
   {
   for (int j = 0; j <= NUM_COLS - 1; j++)
   {
   // Print the element at position (i, j)
   // -->
       System.out.println();
   }
   System.out.println();
   }

   } // End of main
   } // End of class

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
_________________

// Input.txt

Hello
How Are
You
Are So
Beautiful
When
I can
Meet You
Shall
We go
To Hotel To
Have Date
____________________

// Lab10.java

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class Lab10 {
   public static void main(String[] args) {
       // ============================================================
       // Step 2. Declaring Variables You Need

       // These constants are used to define 2D array and loop conditions
       final int NUM_ROWS = 4;
       final int NUM_COLS = 3;
       String filename = "Input.txt";
       // A String variable used to save the lines read from input file
       // -->
String line;
       // ============================================================
       // Step 3. Declare the Array for File Input
       // Please involve the two constants NUM_ROWS and NUM_COLS in the
       // constructor.
       // -->
String strArray[][]=new String[NUM_ROWS][NUM_COLS];
       // ============================================================
       // Step 4: Preparing an Input File
       //
       // Make a text file and write 12 strings in it, one string in each line,
       // and then save it in the folder where your Lab10.java is.
       //
       // Note: If you are using Eclipse, please save the file out of "src"
       // folder.
       //
       // !!!!! NO CODE REQUIRED IN THIS SECTION !!!!!

       // ============================================================
       // Step 5. Reading the File
       // (Please make sure your input file is prepared in Step 4)

       // try-catch statement handles the exception (runtime error)
       //
       // There are two Exceptions might occur when reading a file
       //
       // - FileNotFoundException: thrown by FileReader when the file doesn't
       // exist
       // - IOException: thrown by BufferedReader's readLine() when some I/O
       // error occurs
       //
       // Please check the textbook for details
       try {
           // Instantiate a FileReader object to open the input file
           // Note: "filename" should match the input file you made in Step 4

           // FileReader fr = new FileReader(filename);
           FileReader fr = new FileReader(filename);

           // BufferedReader is for efficient reading of characters
           BufferedReader bfReader = new BufferedReader(fr);

           // Just like scanner.nextLine(), whenever you invoke .readLine()
           // on BufferedReader, it will read a single line from the file.
           //
           // As we have determined the number of lines in our file, we will
           // use constants to define the loop conditions
           for (int i = 0; i <= NUM_ROWS - 1; i++) {
               for (int j = 0; j <= NUM_COLS - 1; j++) {
                   // Read a line from the file
                   // Please invoke .readLine() on the BufferedReadere bfReader
                   // and save the returned value to the element at array
                   // position (i, j)
                   // -->
                   strArray[i][j]=bfReader.readLine();
               }
           }

           // It is very important to close your file after reading is done
           bfReader.close();
       } catch (FileNotFoundException e) {
           System.err.println("File not found");
       } catch (IOException e) {
           System.err.println("I/O error occurs");
       }

       // ============================================================
       // Step 6. Print the Elements in the 2D Array

       for (int i = 0; i <= NUM_ROWS - 1; i++) {
           for (int j = 0; j <= NUM_COLS - 1; j++) {
               // Print the element at position (i, j)
               // -->
               System.out.printf("%-15s",strArray[i][j]);
           }
           System.out.println();
       }

   } // End of main
} // End of class

__________________________

Output:

Hello How Are You
Are So Beautiful When   
I can Meet You Shall
We go To Hotel To Have Date

_______________Could you plz rate me well.Thank You