Class I. Monir Zaman

Transcription

1 Class I Monir Zaman

2 Create the following two java files and put them into same folder Pizza.java numcheesetopp=ct; numpepperonitopp=pt; numhamtopp=ht;

3 Create the following two java files and put them into same folder Pizza.java numcheesetopp=ct; numpepperonitopp=pt; numhamtopp=ht; int d = order1.size; Error! size is declared as private

4 Create the following two java files and put them into same folder Pizza.java char size; numcheesetopp=ct; numpepperonitopp=pt; numhamtopp=ht; int d = order1.size;

5 Create the following two java files and put them into same folder Pizza.java. char d = order1.getsize(); //accessor method for size public char getsize(){ return size; //mutator method for size public void setsize(char s){

6 Create the following two java files and put them into same folder Pizza.java. //accessor method for size public char getsize(){ return size; //mutator method for size public void setsize(char s){ char d = order1.getsize(); order1.setsize( m );

7 Pizza.java. //accessor method for size public char getsize(){ return size; //mutator method for size public void setsize(char s){ char d = order1.getsize(); order1.setsize( m ); Add accessor and mutator methods for other instance variables

8 Pizza.java. public double calccost(){ double price=10; price+=numcheesetopp*2; return price;. System.out.println(order1.calcCost()); You can access private variables (also methods) within the same class

9 Pizza.java. public double calccost(){ double price=10; price+=numcheesetopp*2; return price;. System.out.println(order1.calcCost()); Calculate the price in the following ways: Small size: $10+ $2 per topping Medium size: $12+$2 per topping Large size: $14 + $2 per topping

10 Pizza.java numcheesetopp=ct; numpepperonitopp=pt; numhamtopp=ht;

11 Pizza.java 2 public Pizza(Pizza p){ size=p.getsize(); numcheesetopp=p.getctop(); numpepperonitopp=p.getptop(); numhamtopp=p.gethtop(); Pizza order2=new Pizza(order1); 1 numcheesetopp=ct; numpepperonitopp=pt; numhamtopp=ht;

12 Pizza.java Method overloading 2 public Pizza(Pizza p){ size=p.getsize(); numcheesetopp=p.getctop(); numpepperonitopp=p.getptop(); numhamtopp=p.gethtop(); 1 numcheesetopp=ct; numpepperonitopp=pt; numhamtopp=ht; Pizza order2=new Pizza(order1);

13 Pizza.java.. //mutator method for size public void setsize(int d){ switch(d): case 10: size= s ; break; case 12: size= m ; break; case 14: size= l break; //mutator method for size public void setsize(char s){ char d = order1.getsize(); order1.setsize( m ); order1.setsize(12); System.out.println(order1.getSize()); Another example of method overloading

14 In Pizza.java, write a public method getdescription() that returns a String containing the pizza size, quantity of each topping and the cost as calculated by calccost() Call the method in the

15 Warning: It is a semi complete solution Pizza.java numcheesetopp=ct; numpepperonitopp=pt; numhamtopp=ht; public double calccost(){ double price=10; price+=numcheesetopp*2; return price; public String getdescription(){ String s="pizza is "+ size+" with "+ numcheesetopp+" cheese toppings with price + calccost(); return s;