Semester 6

Extending, Inheritance

public class MyClass {
 public static void main(String args[]) {
  Author author = new Author("Deni R", "rohimatdeni@gmail.com", 'L');
  Book book = new Book("Pemrograman Android", author, 100000.0, 1000);

  System.out.println("Book name : " + book.getName());
  System.out.println(book.getAuthor());
  System.out.println("Price : " + book.getPrice());
  System.out.println("Quantity : " + book.getQty());

 }

 public static class Book {
  private String name;
  private Author author;
  private double price;
  private int qtyInStock = 0;

  public Book(String name, Author author, double price) {
   this.name = name;
   this.author = author;
   this.price = price;
  }

  public Book(String name, Author author, double price, int qtyInStock) {
   this.name = name;
   this.author = author;
   this.price = price;
   this.qtyInStock = qtyInStock;
  }

  public String getName() {
   return this.name;
  }

  public Author getAuthor() {
   return this.author;
  }

  public double getPrice() {
   return this.price;
  }

  public void setPrice(double price) {
   this.price = price;
  }

  public int getQty() {
   return this.qtyInStock;
  }

  public void setQty(int qty) {
   this.qtyInStock = qty;
  }

 }

 public static class Author {
  private String name;
  private String email;
  private char gender;

  public Author(String name, String email, char gender) {
   this.name = name;
   this.email = email;
   this.gender = gender;
  }

  public String getName() {
   return this.name;
  }

  public String getEmail() {
   return this.email;
  }

  public void setEmail(String email) {
   this.email = email;
  }

  public char getGender() {
   return this.gender;
  }

  public void setGender(char gender) {
   this.gender = gender;
  }
  
  public String toString() {
      return "Author Name : " + this.name +"\nAuthor Email : " + this.email + "\nAuthor Gender : " + this.gender;
  }

 }

}

holow square

// C code for hollow squares 
#include <stdio.h> 

// Function to print hollow square 
void print_square(int n) 
{ 
	int i, j; 
	
	for (i = 1; i <= n; i++) 
	{ 
		for (j = 1; j <= n; j++) 
		{ 
			if (i==1) {
				if (j == 1) {
                    printf("# ");
                } else {
                    printf("| ");	  
                }			 
            } else if (i==j) {
                printf("# ");
            } else {			
				printf("* ");			 
            }
		} 
		printf("\n"); 
	} 

} 

// Driver code for above function 
int main() 
{ 
	int rows = 10; 
	print_square(rows); 
	return 0; 
} 

Line Point

public class Line {

 public static void main(String[] args) {
  Point p1 = new Point();
  p1.setX(10);
  p1.setY(2);
   
  Point p2 = new Point();
  p2.setX(8);
  p2.setY(4);

  System.out.println(p1.divide() * p2.multiply());
  System.out.println("Length : " + calculateLength(p1, p2));
 }

  public static double calculateLength(Point p1, Point p2){
    return Math.sqrt(Math.pow(p1.x-p2.x, 2) + 
                     Math.pow(p1.y-p2.y, 2));
  }
}

class Point {
 int x;
 int y;
 
 public void setX(int x) {
  this.x = x;
 }

 public void setY(int y) {
  this.y = y;
 }

 public int getX() {
  return x;
 }

 public int getY() {
  return y;
 }

 public int multiply() {
  return x * y;
 }

 public int divide() {
  if (y != 0) {
   return x / y;
  } else {
   return 0;
  }
 }

}