23/01/25
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Q)Modify the previous application(DistanceApplication.java)
so as to have the following header to addTwoDistances() method.
Distance addTwoDistances(Distance d1,Distance d2)

class Distance{
	int feet;
	int inches;
	Distance(int feet,int inches){
		this.feet=feet;
		this.inches=inches;
	}
	void displayDistance(){
		System.out.println(feet+" feet "+inches+" inches");			
	}
	Distance addTwoDistances(Distance one,Distance two){
          int i=one.inches+two.inches;
		  int f=one.feet+two.feet;
		  if(i>=12){			  
			  f++;//f=20
			  i=i-12;//i=7
		  }
		  Distance result=new Distance(f,i);
	      return result;	  
	}
}
class DistanceApplication{
	public static void main(String[] args) {
		Distance d1=new Distance(10,9);
		System.out.print("First distance is ");
		d1.displayDistance();
		Distance d2=new Distance(9,10);
		System.out.print("Second distance is ");
		d2.displayDistance();
		Distance d=d1.addTwoDistances(d1,d2);
		System.out.print("Resultant distance is ");
		d.displayDistance();
	}
}
                                           Access  Modifiers
					   ------------------
Q)What is an access modifier?
=>An access modifier is a keyword in Java that specifies/modifies the accessibility(visibility)
mode of the memebers of a class.

 Access Modifer concept is all about "WHO CAN ACCESS WHOM FROM WHERE".

=>There are 3*    access modifiers in Java.
         1)private
	 2)protected
	 3)public 
=>But, there are 4 accessiblity modes in Java
       1)private mode
       2)default mode
       3)protected mode
       4)public mode
Note:- If we don't apply any access modifier to a member of a class, it will have
default accessibility mode.

class A{
     private int a; //a is in private accessibility mode
     int b;//b is in default accessibility mode
     protected void m(){// m() is in protected accessibility mode
     }
     public void n(){ // n() is in public accessibility mode.
     }
}

=>private accessibility mode fecilitates class level visibility/accessibility.
I.e. once a variable or a method of a class is made private,it is accessible
 in the methods of that class only.

=>default accessibility mode fecilitates  class level visibility + package level visibility

=>protected accessibility mode fecilitates  class level visibility+package level visibility
+child class level visibility

=>public accessibility mode fecilitates entire application level visibility