custom exception

// import java.util.sanner;
import java.util.Scanner;

public class checkEligibility {
  public static void main(String[] args) {
    // system.out.printin("Customer_number\tAge\tUnit");
    System.out.println("id\tAge\tUnit");
    int age[]  = {50,  60, 70, 30};
    int unit[] = {300,200,100,400};

    for (int counter = 0; counter < age.length; counter++) {
      // system.out.println(counter + "\t" + age[counter] + "\t" + unit[counter]);
      System.out.println(counter + "\t" + age[counter] + "\t" + unit[counter]);
    }
    for (int counter = 0; counter < age.length; counter++) {
      if (age[counter] < 55 && unit[counter] > 250) {
        // <added>
        System.out.print("id " +counter +": ");
        // </added>
        // JavaException();
        new JavaException();
      }
    }
  }
}

class JavaException {
  // public static void main(String args[]) {
  JavaException() {
    try {
      throw new MyException(2);
      // throw is used to create a new exception and throw it.
    } catch (MyException e) {
        System.out.println(e);
    }
  }
}

// <added>
class MyException extends Exception {
  private static final long serialVersionUID =
    1L; //eg.
  public MyException(int n) {
    //... ?
  }
// </added>

  public String toString(){
    return ("The consumer is not eligible for getting the discount.");
  }
}

/* Output:
id      Age     Unit
0       50      300
1       60      200
2       70      100
3       30      400
id 0: The consumer is not eligible for getting the discount.
id 3: The consumer is not eligible for getting the discount.
*/