public class Book{
protected String color;
protected int year;
Book(){color="";year=0;}
Book(String color, int year){
this.color=color;
this.year=year;
}
//seter
void setColor(String color){this.color=color;}
void setYear(int Year){this.Year=year;}
//geter
string getColor(){
return color;}
string getYear(){
return year;}
//function
public int numOfA(){
int count=0;
for(int i=0;i
count ++;
}}
// klasi pou klironomi tin book
class EBook extends Book{
private String URL;
EBook(){super();URL="";}
EBook(string color,int year,string URL){
super(color year);
this.URL;
}//class ebook
public static void bublesort(Ebook onoma adikimenou[]){
for(int i=1;i
if (ebooks[j].getpages()
temp=ebooks[j];
ebooks[j]=ebooks[j-1];
ebooks[j-1]=temp;
}}}
public static void main(String[] args){
EBook[] ebooks = new EBook[5];//pinakas 5 vivliwn
for(int i=0;i
ebooks[0].setPages (100);ebooks[1].setpages(210);//an valw adia orismata ta gemizw
for(int i=0;i<5;i++){
system.out.println();
system.out.println(ebooks[i].getPages());}