Need help modifying a code

import java.util.*;
public class Payroll
{
	// main method begins execution of Java application
	public static void main( String args[] )
	{
		
		// create Scanner to obtain input from command window
		Scanner input = new Scanner( System.in );
		
		String name = ""; // employee's name
		int number1; // hourly rate
		int number2; // number of hours worked for the week
		int product; // product of number1 and number2
 
		while(name!=null && !name.equalsIgnoreCase("stop"))
 {
	 	number1 =-1;
		number2 = -1;
	 
		System.out.print( "Enter employee's name: "); //prompt user to input name
		name = input.nextLine(); //read employee's name from user's input
		while(number1<0)
		{
		System.out.print( "Enter hourly rate: " ); // prompt user for employee's hourly rate
		number1 = input.nextInt(); // read hourly rate from user's input
		}
		while(number2<0)
		{	
		System.out.print( "Enter hours worked for the week: " ); // prompt user to enter number of hours worked for the week
		number2 = input.nextInt(); // read number of weeks from user's input
		}
		
		product = number1 * number2; // multiply numbers
		
		System.out.print( "The Employee " + name ); // displays employee's name
		System.out.println( " weekly pay is $%d\n"  + product ); // displays weekly pay
 }
 
	} // end method main
 
} // end class Payroll