Modify before asshignment so that we can check input errors

Modify before asshignment so that we can check input errors, etc.. Please refer to the following Java code.

You should add switch, run your programing untill you choose figure==0 (using while loop), cheak input error.

import java.util.*;

public class AreaTestt {

public static void main (String[] args)

{

int choice1 = menu(1);

int choice2 = menu(2)

}

// get user choice

public static int menu(int n)

{

int choice = 0;

Scanner scanner = new Scanner(System.in);

if(n == 1)

{

System.out.print(\"Information for figure 1: Type 1) rectangle 2) triangle 3) circle: \");

choice = scanner.nextInt();

}

else if(n == 2)

{

System.out.print(\"Information for figure 2: Type 1) rectangle 2) triangle 3) circle: \");

choice = scanner.nextInt();

}

return choice;

}

}

Solution

import java.util.*;

public class AreaTestt {

   public static void main(String[] args) {

       menu();

   }

   // get user choice
   public static void menu() {
       int choice = 0;
       Scanner scanner = new Scanner(System.in);
       do {
           choice = scanner.nextInt();
           switch (choice) {
           case 1:
               System.out
                       .print(\"Information for figure 1: Type 1) rectangle 2) triangle 3) circle: \");

               break;

           case 2:
               System.out
                       .print(\"Information for figure 2: Type 1) rectangle 2) triangle 3) circle: \");

               break;
           default:
               break;
           }
       } while (choice != 0);

   }
}

OUTPUT:

2
Information for figure 2: Type 1) rectangle 2) triangle 3) circle: 3
1
Information for figure 1: Type 1) rectangle 2) triangle 3) circle: 0