The document is a Java program designed to read a 4x4 matrix from a file named 'matrix.txt'. It utilizes the Scanner class to read the file line-by-line, splitting each line into an array for storage. The code includes error handling for file not found exceptions but appears to have some syntax issues.

1. Comments added...
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
/**
*
* @author prmsh
*/
public class SaveMatrix {
public static void main(String args[]) {
//declaring matrix..
String[][] data = new String[4][4];
int row = 0;
// opening and reading file
File file = new File("matrix.txt");
try {
Scanner sc = new Scanner(file);
while (sc.hasNextLine()) {
String line = sc.nextLine();
//splitting each row by spaces
String[] lineArray = line.split(" ");
//storing into array
for(int i=0; i
Solution
Comments added...
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
/**
*

2. * @author prmsh
*/
public class SaveMatrix {
public static void main(String args[]) {
//declaring matrix..
String[][] data = new String[4][4];
int row = 0;
// opening and reading file
File file = new File("matrix.txt");
try {
Scanner sc = new Scanner(file);
while (sc.hasNextLine()) {
String line = sc.nextLine();
//splitting each row by spaces
String[] lineArray = line.split(" ");
//storing into array
for(int i=0; i