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11 September, 19:26

Modify any of the previous labs which would have crashed when non-numeric data was entered by adding exception handling so that the non-numeric input no longer crashes the program. The program must handle the invalid input gracefully by informing the user of the bad input and re-querying until the user provides valid input. It must re-query for the specific input which was incorrectly entered.

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  1. 11 September, 19:55
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    see explaination

    Explanation:

    import java. util. InputMismatchException;

    import java. util. Scanner;

    public class calculate {

    static float a=0, b=0;

    double cal ()

    {

    if (a==0||b==0)

    {

    System. out. println ("no values found in a or b");

    start ();

    }

    double x = (a*a) + (b*b);

    double h=Math. sqrt (x);

    a=0;

    b=0;

    return h;

    }

    float enter ()

    {

    float val=0;

    try

    {

    System. out. println ("Enter side");

    Scanner sc1 = new Scanner (System. in);

    val = sc1. nextFloat ();

    return val;

    }

    catch (InputMismatchException e)

    {

    System. out. println ("Enter correct value");

    }

    return val;

    }

    void start ()

    {

    calculate c=new calculate ();

    while (true)

    {

    System. out. println ("Enter Command");

    Scanner sc = new Scanner (System. in);

    String input = sc. nextLine ();

    switch (input)

    {

    case "A":

    a=c. enter ();

    break;

    case "B":

    b=c. enter ();

    break;

    case "C":

    double res=c. cal ();

    System. out. println ("Hypotenuse is : "+res);

    break;

    case "Q":

    System. exit (0);

    default:System. out. println ("wrong command");

    }

    }

    }

    public static void main (String[] args) {

    calculate c=new calculate ();

    c. start ();

    }

    }
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