public class Contract {
 private int totalCost; 
 private int hoursLeft; 
 private String employer; 

 public Contract(String employer, int hours){ 
  this.employer = employer; 
  this.hoursLeft = hours; 
  //... 
 } 
 public void spendHour(){
  this.hoursLeft--; 
 } 

 public int getTotalCost(){
  return this.totalCost; 
 } 
 //... 
}