A solution that never caused the error again for me was to use:

import java.util.Scanner;

String arbritraryString ="";
int arbritraryInteger =0;
boolean temporaryCondition =false;
Scanner keyboard =new Scanner(System.in);

do{
    try{
        arbritraryString =keyboard.nextLine();
        arbritraryInteger =Integer.parseInt(arbritraryString);
        /*
        The rest of your code
        */
        temporaryCondition =false;
    }catch(NumberFormatException e){System.err.println("error"); temporaryCondition =true;}
}while(temporaryCondition);