How do you make this program to not crash on special characters or letters and instead it should ask to re-enter another integer. Ex. If I type "lala" or "(%*(#@" the program would crash. Can someone edit the code to fix it. Thank you in advance.

import java.util.Scanner;

public class OddandEvenDigits {

public static void main(String[] args) {

int choice=0;

int num;

Scanner sc =new Scanner(System.in);

do {

System.out.println("Enter the number : ");

num =sc.nextInt();

System.out.println(validate(num));

if(num>0) {

System.out.println("the original number is : "+num);

reverse(num);

even(num);

System.out.println();

odd(num);

}

System.out.println(" 1:continue 0:exit");

System.out.println("Enter choice : ");

choice = sc.nextInt();

}while(choice == 1);

sc.close();

}

//reverse method

public static void reverse (int num) {

int num_reverse=0;

while(num != 0)

{

num_reverse = num_reverse * 10;

num_reverse = num_reverse + num%10;

num = num/10;

}

System.out.println("the number reversed "+num_reverse);

}

//even method

public static void even(int num) {

int even;

System.out.print("the even digits are ");

while(num>0) {

even=num%10;

if(even%2==0) {

System.out.print(even +" ");

}

num=num/10;

}

}

//odd method

public static void odd(int num) {

int odd;

System.out.print("the odd digits are ");

while(num>0) {

odd=num%10;

if(odd%2!=0) {

System.out.print(odd +" ");

}

num=num/10;

}

}

//validate method

public static String validate (int num) {

if(num>0) {

return "Entered number is greater than zero";

}

else {

return "Entered number is less than zero";

}

}

}

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