Using a scanner to input row an column sizes for my grid from a file PLEASE HELP

Hello Im brand new to this forum I'm very new to java programming Im working on a programming exercise that I have to create a word search using a 2d array. I have 2 questions the first on being is I have to use the Scanner class to read in # of rows and cols then instantiate a char[][] of that size, and store it in grid then fill grid with random chars. Im not sure how to go about doing this as far as reading from a file an using that info to make the size of my array

thnak you for your help

You could use properties. It's VERY basic, perfect when you just need to store 1-5 basic variables (EG, int, String, long, double).

Code Java:

---

/*
 * Precondition -> file is a String to the loccation of the file,
 */
FileReader fr = new FileReader(file);
Properties prop = new Properties();
prop.load(fr);
int rows = Integer.valueOf(prop.get("rows"));
int cols = Integer.valueOf(prop.get("cols"));

---

Later, for storing

Code Java:

---

FileWriter out = new FileWriter(file);
prop.setProperty("rows", rows+"");
prop.setProperty("cols", cols+"");
prop.store(out, "--No Comment--");
out.close();

---

thank you this helped I need help with placing my words in my grid using a switch statement , here is what I have thus far

public class WordSearchlab3
{



public static void main(String[] args) throws IOException
{
generateWordSearchProblem("Instructions");

}

public static void generateWordSearchProblem(String filename)
throws IOException
{
Scanner scan = new Scanner(new File(filename));

char[][] grid;

grid = makeGrid(scan);
// placeWords(grid, scan);
printGrid(grid);
}

public static char[][] makeGrid(Scanner scan) throws IOException
{


Scanner input = new Scanner(System.in);

int r = scan.nextInt();
int c = scan.nextInt(); // varibles

char[][] grid = new char[r][c];

for (int i = 0; i < grid.length; i++)
{

for (int c2 = 0; c2 < grid[i].length; c2++)
{

Random rng = new Random();
char j = (char) (rng.nextInt(26) + 'a');

grid [i][c2] =j ;

}

}

return grid ;

}
public static void placeWords(char[][] grid, Scanner scan)
{

int startRow = scan.nextInt();
int StartCol = scan.nextInt();

String direction = scan.next();
String word = scan.next();


switch (direction.charAt(0)) {

case 'N':

case 'S':

case 'E':

case 'W':


}







// use the Scanner to read in each line of the text file
// obtain the starting row, starting col, direction and word
// use that to place the word in the grid
}

public static void printGrid(char[][] grid)


{
for (int i = 0; i < grid.length; i++)
{
for (int k = 0; k < grid[i].length; k++)
{
System.out.print(grid[i][k]);
}
System.out.print("\n");
}
}
}

This is the output of the sample I need 10 , 15 represents the size of the grid 0 0 HELLO is the direction Im trying to get these words implemented into my grid using a switch statement

10 15
0 0 S HELLO
5 9 W GOODBYE
3 2 E HELP
would produce this grid:
Huhksdoval
Ethlrwayrz
Lttxkkwlcu
LsHELPpgyg
Owylzoigvi
tqhEYBDOOG
kcqjrlalgj
qbeqhnhjeh
niqzjkyyir
vtfdefbhjt

Highlight your code with

Code :

---

[highlight=Java] and [/highlight]

---

I m not sure hot to do that sorry could you show me to do that

thanks

Code :

---

<script type="text/javascript">
<!--
   public class WordSearchlab3
{
 
 
 
	public static void main(String[] args) throws IOException
	{
		generateWordSearchProblem("Instructions");
 
	}
 
	public static void generateWordSearchProblem(String filename)
		throws IOException
	{
		Scanner scan = new Scanner(new File(filename));
 
		char[][] grid;
 
		grid = makeGrid(scan);
//		placeWords(grid, scan);
		printGrid(grid);
	}
 
	public static char[][] makeGrid(Scanner scan) throws IOException
	{
 
 
		Scanner input = new Scanner(System.in);
 
		int r = scan.nextInt();
		int c = scan.nextInt();  // varibles 
 
		char[][] grid = new char[r][c];
 
		for (int i = 0; i < grid.length; i++)
		{
 
			for (int c2 = 0; c2 < grid[i].length; c2++)
			{
 
			Random rng = new Random();
			char j = (char) (rng.nextInt(26) + 'a');
 
         grid [i][c2] =j ; 
 
			}
 
		}
 
	    return grid ;
 
	}
	public static void placeWords(char[][] grid, Scanner scan)
	{
 
	    int startRow = scan.nextInt(); 
		 int StartCol = scan.nextInt();
 
		 String direction = scan.next(); 
		 String word = scan.next();
 
 
		 switch  (direction.charAt(0))     { 
 
			 case 'N':  
 
			 case 'S': 
 
			 case 'E': 
 
			 case 'W': 
 
 
		}
 
 
 
 
 
 
 
		// use the Scanner to read in each line of the text file
		// obtain the starting row, starting col, direction and word
		// use that to place the word in the grid
	}
 
	public static void printGrid(char[][] grid)
 
 
	{
		for (int i = 0; i < grid.length; i++)
		{
			for (int k = 0; k < grid[i].length; k++)
			{
				System.out.print(grid[i][k]);
			}
			System.out.print("\n");
		}
	}
}
//-->
</script>

---