Can you help me to implement a try and catch in case the user types a noninteger? thank you 

 

 

import java.util.Scanner;

public class borrar2 {

  // Main() method
  public static void main(String[] args) {
     
     Scanner input = new Scanner(System.in);
     
     System.out.println("This program will calculate the payroll for 5 to 20 employees");
 
      // first we get the number of employees
     System.out.print("How many employees you would like to process? ");
 
  // try {
 
     int empNum = Integer.parseInt(input.nextLine());

     if (empNum > 20 || empNum < 5) {
        System.out.print("\nEmployees numbers must be in range 5 - 20, try again!!!\n");
         
     /* } // Closes try
        catch(NumberFormatException nfe) {
        System.out.println("You did not enter a number");
        System.out.println("This program will end now");
        }
     */
        System.exit(0);
     }

 

     int[][] payRolls = new
       
        int[empNum][5];
 
      // now for each employee we generate 5 random integers between 0 and 12
     for (int i = 0; i < empNum; i++) {
        for (int j = 0; j < 5; j++) {
           payRolls[i][j] = generateRandom(0, 12);
        }
     }
 
 
 
      /**
       * Now we call the payRoll method this method will print the statics about weekly earning
       */
     calculatePayRoll(payRolls);
  }

 

  public static int generateRandom(int min, int max) {
     return (int)Math.floor(Math.random()*(max-min+1)+min);
  }

 

  /**
   * calculatePayRoll method takes a 2D array that contains the weakly hours worked
   * for per employee, this method first calls the another method to print the hours worked per
   * day as specified in the question,
   * and then this method iterates over hours worked list for each employee
   * and calculates earning amount
   */
  static void calculatePayRoll(int[][] hoursWorked) {
 
 
 
     printStatics(hoursWorked);
 
 
 
      // this list stores the earning amount
     double[] payRolls = new      double[hoursWorked.length];
 
 
 
     int overtimeCount = 0;
 
 
 
     int weaklyHours = 0;
     double earnAmount;
 
 
 
     for (int j = 0; j <
     
      hoursWorked.length; j++) {
     
     
     
        weaklyHours = 0;
        earnAmount = 0;
     
     
     
          // first calculate the total hours worked in a weak
        for (int i = 0; i < hoursWorked[j].length; i++) {
       
           weaklyHours += hoursWorked[j][i];
       
        }
     
     
     
          // then check whether the worked hours are more than 40
        if (weaklyHours > 40) {
           overtimeCount++;
       
       
       
              // calculate earning amount according
           earnAmount = (double) (((weaklyHours - 40)*21.75) + 40 * 14.50);
        } else {
           earnAmount = (double)(weaklyHours * 14.50);
        }
        payRolls[j] = earnAmount;
     }
 
 
 
     System.out.printf("\nTotal employees that worked overtime : "+ overtimeCount + " \n\nFollowing are the Employees and there Earned Amount:\n");
 
 
 
     for (int x = 0; x < payRolls.length; x++) {
     
     
     
        System.out.print("\nEmployee "+(x+1)+" = \t$" +payRolls[x]);
     }
 
     System.out.print("\n");
  }

  // following method prints the per day worked in a tabular format
  static void printStatics(int[][] hoursWorked) {
 
     System.out.printf("\nPrinting all employees and hours \n\n%14s %5s %5s %5s %5s %5s\n", "Employee No.","MON", "TUE", "WED", "THU", "FRI");

     for (int i = 0; i < hoursWorked.length; i++) {
        System.out.printf("\n%14s ", "Employee "+ (i+1));
        for (int j = 0; j < 5; j++) {
           System.out.printf("%5d ",hoursWorked[i][j]);
        }
        System.out.print("\n");
     }
     System.out.print("\n\n");
  }
}