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POHow to iterate a string in order to validate values are in range using charAt()?
 

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  1. POHow to iterate a string in order to validate values are in range using charAt()?
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    <p>I am trying to iterate a string that contains the users inputed values. I want to validate that the user only enters 4 characters and that all of them are between 1 and 4. For example, prompts the user to enter 4 values using commas, therefore they can only enter 1,2,3,4. If they enter anything else, then they will be asked again. I have included the section of my code where I am trying to perform the validation. I am also experiencing an unreachable code error which does not make sense to me. This takes place after I close the while (true) loop. </p> <pre><code> //Entering by ROWS //This is for a 4x4 board size using rows if (dataSelection == 1) { if (boardSize == 1) { int row = 1; while (row &lt; 5) { String row1Values4x4 = "-1"; while (true) { Scanner firstRow4x4 = new Scanner(System.in); System.out.println("Please enter four values using commas for row " + row); //this needs to loop row1Values4x4 = firstRow4x4.next(); row1Values4x4 = row1Values4x4.replaceAll(" ",""); //this is in case user enters numbers with spaces for (int i = 0; i &lt; row1Values4x4.length(); i++) { char c = row1Values4x4.charAt(i); if (row1Values4x4.length() == 7 &amp;&amp; c == 48) //I entered 48 in order to test if it is using ascii value (48 = 0) { break; } } } //I think I need to include another break in order to escape the second loop? String strArray[] = row1Values4x4.split(","); //This is where I get an unreachable code error int arraySidesInteger[] = new int[strArray.length]; for (int i = 0; i &lt; strArray.length; i++) { arraySidesInteger[i] = Integer.parseInt(strArray[i]); } fourArray[row-1] = arraySidesInteger; for (int i = 0; i &lt; fourArray.length; i++) { for (int j = 0; j &lt; fourArray.length; j++) System.out.print(fourArray[i][j] + " "); System.out.println(); } row++; } </code></pre> <p>Please let me know if there </p>
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    1. USCole Johnson
    1. USBrandon
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    2. PO
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    1. This table or related slice is empty.
    1. COWhy are you using a matrix?
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      1. POHow to iterate a string in order to validate values are in range using charAt()?
      1. USCole Johnson
    2. CO`//I entered 48 in order to test if it is using ascii value (48 = 0)` fwiw, you could do `c == '0'` instead of `c == 48`.
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      1. POHow to iterate a string in order to validate values are in range using charAt()?
      1. USDennis Meng
    3. CO@ColeJohnson I am using a matrix or 2 dimensional array in order to sort the users input by row and column. Its for a 4x4 Sudoku game.
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      1. POHow to iterate a string in order to validate values are in range using charAt()?
      1. USBrandon
 

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