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| //A class describes the attributes and behaviors of an object.
class testBook {
// instance fields
String name;
int year;
// method
public String getName()
{
return name;
}
// method
public int getyear()
{
return year;
}
}
//Overload Constructor.
package lab2-3-1;//Overloading
class testBook {
String name;
int year;
public testBook ()
{
this.name = "TheReturnoftheKing";
this.year = 1955;
}
public testBook (String n, int rad)
{
this.name = n;
this.year = rad;
}
}
public class Main {
public static void main(String[] args) {
testBook testBook1 = new testBook (); // testBook reference and object
testBook testBook2 = new testBook ("TheTwoTowers",1954);
System.out.println(testBook1.name + ", " + testBook1.year);
System.out.println(testBook2.name + ", " + testBook2.year);
}
}
//IS-A Relationship (add in the listings (from item 4, 5 or 6) « IS-A Relationship »).
package lab2-3-2;//IS-A relationship
class testBook {
public void pages ()
{
System.out.println("testBook can have pages ");
}
}
class electronictestBook extends testBook
{
}
class Book extends testBook
{
}
public class Main {
public static void main(String[] args) {
testBook testBook = new testBook (); // testBook reference and object
electronictestBook electronictestBook = new electronictestBook ();
Book Book = new Book ();
testBook.pages ();
electronictestBook.pages ();
Book.pages ();
}
}
//HAS-A relationship (add in the listings (from item 4, 5, 6 or 7) «HAS-A relationshiponship»).
Package lab2-3-3 ;//HAS-A relationship
class stranicy
{
public String name;
public stranicy (String strname)
{
System.out.println("Constructing an stranicy");
this.name = stranicy;
}
}
abstract class TestBook
{
private stranicy mystr;
private String name;
private int year;
public TestBook (String name, String strname, int year)
{
System.out.println("Constructing an TestBook ");
this.name = name;
this.year = year;
strCap = new stranicy (strname);
strCap.name = strname;
}
public String getstranicyName()
{
return this.str.name;
}
public String getName()
{
return name;
}
public int getyear()
{
return year;
}
}
class electronictestBook extends testBook
{
private String type;
public electronictestBook (String name, String strname, int year, String type)
{
super(name, strname, year);
this.type = type;
}
public String getType()
{
return type;
}
}
public class Main {
public static void main(String[] args) {
electronictestBook Fantasy = new electronictestBook ("TheFellowshipOfTheRing"," TheHobbitorThereandBackAgain",1954,"Fantasy");
electronictestBook poetry = new electronictestBook ("SobranieStichotvorenii","KamennyGost",2004,"poetry");
System.out.println("using electronictestBook reference --");
System.out.println("Fantasy.getName");
System.out.println("Fantasy.getstrName");
System.out.println("Fantasy.year");
System.out.println("Fantasy.getType");
System.out.println("using testBook reference --");
System.out.println("poetry.getName");
System.out.println("poetry.getstrName");
System.out.println("poetry.year");
System.out.println("poetry.getType");
}
}
//Overriding (override some methods in your program).
//In overriding a method has same method name, type, number of parameters etc.
package lab2-3-4;// Overriding
class testBook {
public void publish()
{
System.out.println("testBook can publish");
}
}
class electronictestBook extends testBook {
public void publish()
{
System.out.println("electronictestBook can load");
}
}
Class audiobook extends testBook {
public void publish()
{
System.out.println("audio can be listen");
}
}
public class Main {
public static void main(String[] args) {
testBook a = new testBook (); // TestBook reference and object
testBook b = new electronictestBook ();
testBook c = new audiobook ();
a.publish();
b.publish();
c.publish();
}
}
//Polymorphism
File name : TestBook.java
public class testBook {
private String name;
private int year;
public testBook (String name, int year)
{
System.out.println("Constructing an testBook ");
this.name = name;
this.year = year;
}
public void info()
{
System.out.println("info: " + this.name
+ " " + this.year);
}
public String getName()
{
return name;
}
public int year()
{
return year;
}
public void setyear(int newyear)
{
year = newyear;
}
}
//Now suppose we extend testBook class as follows
//File name : electronictestBook.java
public class electronictestBook extends testBook {
private String type;
public electronictestBook (String name, int year, String type)
{
super(name, year);
setType(type);
}
public void info()
{
System.out.println("Within info of electronictestBook class ");
System.out.println("info: " + getName()
+ " with type " + type);
}
public String getType()
{
return type;
}
public void setType(String newtype)
{
type = newtype;
}
}
//File name : Main.java
public class Main {
public static void main(String[] args) {
electronictestBook es = new electronictestBook ("SobranieStichotvorenii ", 2004, "poetry");
testBook s = new electronictestBook ("KamennyGost ", 2004, "poetry");
System.out.println("Call status using electronictestBook reference ——");
es.info();
System.out.println("\n Call status using testBook reference——");
s.info();
}
}
//Abstraction
Package lab2-3-4;//Abstraction
abstract class testBook
{
private String name;
protected int year;
public testBook (String name, int year)
{
System.out.println("Constructing an testBook ");
this.name = name;
this.year = year;
}
public String getName()
{
return name;
}
public abstract int year();
}
class war extends testBook
{
private String type;
public electronictestBook (String name, int year, String type)
{
super(name, year);
this.type = type;
}
public int year()
{
return year;
}
public String getType()
{
return type;
}
}
public class Main {
public static void main(String[] args) {
electronictestBook fantasy = new electronictestBook ("TheFellowshipOfTheRing", 2004, "fantasy");
testBook poetry = new electronictestBook ("SobranieStichotvorenii", 1954, "poetry");
System.out.println("using electronictestBook reference --");
System.out.println("fantasy.getName");
System.out.println("fantasy.year");
System.out.println("fantasy.getType");
System.out.println("using testBook reference --");
System.out.println("poetry.getName");
System.out.println("poetry.year");
}
}
//Encapsulation.
//File name : TestBook.java
public class testBook {
private String name;
private String type;
private int year;
public String getName()
{
return name;
}
public String getType()
{
return type;
}
public float year()
{
return year;
}
public void setName(String newName)
{
name = newName;
}
public void setType(String newType)
{
type = newType;
}
public void setyear(int newyear)
{
year = newyear;
}
}
//File name : Main.java
public class Main {
public static void main(String[] args)
{
testBook testBook = new TestBook ();
testBook.setName("Mumu");
testBook.setType("story");
testBook.setyear(2003);
System.out.print("Name : " + testBook.getName()+ ", "+
" Type : "+ testBook .getType()+ ", "+
" year : "+ testBook.year());
}
//Interfaces
//Implementing Interfaces
//Filename: testBook.java
package lab2-3-5 ;
public interface testBook {
public void publish();
public void ();
}
//Filename: electronictestBook.java
Package lab2-3-6;
public class electronictestBook implements testBook {
public void sail(){
System.out.println("electronictestBook is publish");
}
public void written(){
System.out.println("electronictestBook is written");
}
public int numOfPages(int pages)
{
return pages;
}
public static void main(String[] args) {
electronictestBook e = new electronictestBook ();
e.publish();
e.break();
}
//Extending Interfaces:
//Filename: fantasy.java
public interface Fantasy {
public void setfantasyName(String name);
public void setPublData(String name);
}
//Filename: Poetry.java
public interface Poetry extends fantasy{
public void poetryRussian(string name);
public void poetryEnglish(string name);
}
//Filename: documentary.java
public interface documentary extends fantasy
{
public void documentaryMaterial(String material);
}
//Packages
//Put an interface in the package P1:
package P1;
public class testBook {
private String name;
protected int year;
public testBook(String name, int year)
{
this.name = name;
this.year = year;
}
public String getName()
{
return name;
}
public int year()
{
return year;
}
}
//put an implementation in the same package P1:
package P1;
import static java.lang.System.out;
public class Main {
public static void main(String[] args) {
testBook testBook1 = new testBook("TheFellowshipOfTheRing", 1954);
testBook testBook2 = new testBook("KamennyGost", 2004);
out.println("TestBook1.getName");
out.println("TestBook1.year");
out.println("TestBook2.getName");
out.println("TestBook2.year");
}
}
//Else use keyword import:
Package lab-2-3-8;//Package
import static java.lang.System.out;
import P1.*;
public class Main {
public static void main(String[] args) {
testBook testBook1 = new testBook ("TheFellowshipOfTheRing", 1954);
testBook testBook2 = new testBook ("KamennyGost, 2004);
out.println("testBook1.getName");
out.println("testBook1.year");
out.println("testBook2.getName");
out.println("testBook2.year");
}
} |
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