class Printer {

 private String name = "HP-Printer"; 
 
 void setName(String newName){
   name = newName;
 }

 String getName (){
   return name;
 }
 
 void printName(){
   System.out.println(name);
 }
	
 void printDifference(int a, int b){
    System.out.println(a + " - " + b + " = " + (a-b));
 }
 
public static void main (String [] args){
  // Object creation 
  Printer p = new Printer();

  // message sending (Call of a method)
  p.printName();
  p.printDifference(4, 3);
	

  //Passing a parameter into the program
  // p.setName(args[0]);
  // p.printName();
}
}