I have been trying to remove two errors in this code, line 12 (non-static variable this cannot be referenced from a static context) and line 204(cannot find symbol:(method compareTo(java.lang.Object)
import java.util.*;
public class InventoryPart3 {
public static void main(String[] args) {
Inventory invent = new Inventory(); <---[U]non-static variable this cannot be referenced froma static context.[/U]
Title dvd;
Scanner input = new Scanner(System.in);
Title[] titles = new Title[5];//an array of 5 titles
dvd = new Title("Return to Never Land", 001, 5,16.99);
invent.add(dvd);
dvd = new Title("Tarzan", 002, 5, 19.99);
invent.add(dvd);
dvd = new Title("Tarzan II",003, 4, 19.99);
invent.add(dvd);
dvd = new Title("Beauty and the Beast", 004, 3, 24.99);
invent.add(dvd);
dvd = new Title("Hercules", 005, 3, 15.99);
invent.add(dvd);
invent.display();
//end main
}//end class Inventory3
class DVD{
private int dvdItem;
private String dvdTitle;
private int dvdStock;
private double dvdPrice;
public DVD(int item, String title, int stock, double price){
dvdItem = item;
dvdTitle = title;
dvdStock = stock;
dvdPrice = price;
}//end four-argument constructor
//set Dvd Item
public void setDvdItem(int item){
dvdItem = item;
}//end method set DVD Item
//return Dvd Item
public int getDvdItem(){
return dvdItem;
}//end method get Dvd Item
//set Dvd Title
public void setDvdTitle(String title){
dvdTitle = title;
}//end method set Dvd Title
//return Dvd Title
public String getDvdTitle(){
return dvdTitle;
}//end method get Dvd Title
//set dvd stock
public void setDvdStock(int stock){
dvdStock = stock;
}//end method set Dvd Stock
//return dvd Stock
public int getDvdStock(){
return dvdStock;
}//end method get Dvd stock
//set dvd price
public void setDvdPrice(double price){
dvdPrice = price;
}//end method setDvdPrice
//return DVD price
public double getDvdPrice(){
return dvdPrice;
}//end method get Dvd Price
//calculate inventory value
public double value(){
return dvdPrice * dvdStock;
}//end method value
public String toString(){
return String.format("item=%3d title=%-20 units=3%3d price=$%6.2f value=$%7.2f",dvdItem, dvdTitle, dvdStock, dvdPrice, value());
}
}//end class Dvd
class Movie extends DVD {
private String movieTitle;
public Movie(String title, int Item, String dtitle, int stock, double price){
super (Item, dtitle, stock, price);
movieTitle = title;
}
public double value(){
double value = getDvdPrice() * getDvdStock();
value = 1.05 * value;
return value;
}//end method value
public String toString(){
String s = String.format("Movie title=%-12s",movieTitle);
s = s + " " + super.toString();
return s;
}
}//end class Movie
class Inventory{
private Title[] dvds;
private int count;
private Title[] dvd;
Inventory(){
dvds = new Title[10];
count = 0;
}
public void add(Title dvd){
dvds[count] = dvd;
++count;
sort();
}
public double entireValue(){
double value = 0;
for (int i = 0; i < count; i++){
value = dvd[i].value();
}
return value;
}
public void sort(){
int postion = 0;
for(int index = 1; index < count; index++){
Title key = dvd[index];
int position = index;
//Shift larger values to the right
while(position > 0 && key.getDvdTitle().compareTo(dvds[postion-1].getDvdTitle())< 0 ){ [U]<---cannot find symbol:(method compareTo(java.lang.Object)[/U]
dvds[position] = dvds[position-1];
position--;
}
dvds[position] = key;
}
}
public void display(){
System.out.println("\nThe inventory contains " + count +"DVDs\n");
for(int i = 0; i < count; i++)
System.out.printf("%3d %s\n", i, dvds[i]);
System.out.printf("\nThe total inventory value is $%.2f\n\n", entireValue());
}
}
}//end class Inventory
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