writing array of objects to a file

[DA AD]

The first class
import java.io.*;
import java.io.IOExcep tion;
import java.util.Scann er;
import javax.swing.*;

import java.util.Forma tter;
public class Project implements Serializable

{

TestProject s=new TestProject();
Scanner sc=new Scanner(System. in);
private int accNo;
private String company;
private int type;
private int quantity;
private double price;
private int newQuantity;
private double newPrice;
static int x=0;
private int eq;
private Formatter output;




public Project()
{
// save(TestProjec t[] accessory);
}


public static void save(TestProjec t accessory [])
{
try {

ObjectOutputStr eam objOut = new ObjectOutputStr eam(new FileOutputStrea m("student.txt" ));

objOut.writeObj ect(accessory);
objOut.close();
}
catch(Exception e)
{
System.out.prin tln("E");
}
}

public Project(int update)
{
getaccNo();

}
public void setaccNo(int acc_No)
{
accNo=acc_No;
}


public void setCompany(Stri ng company1)
{
company=company 1;
}


public void setType(int type1)
{
type=type1;
}


public void setQuantity(int quantity1)
{
quantity=quanti ty1;
}


public void setPrice(double price1)
{
price=price1;
}


public int getaccNo()
{
return accNo;
}
public int getEq()
{
return eq;
}


public void startj()
{
System.out.prin tln("** Computer Accessories Store **\n"+"How Much Equipments do you have");
int eq=sc.nextInt() ;
}

public String getCompany()
{
return company;
}


public int getQuantity()
{
return quantity;
}


public double getPrice()
{
return price;
}


public int getType()
{
return type;
}


String show()
{


return(" "+accNo+" "+" "+company+" "+type+" "+quantity+
" "+" "+price);
}
public void add()
{
Scanner sc=new Scanner(System. in);
System.out.prin tln("What is the Serial ID: ");
accNo=sc.nextIn t();
System.out.prin tln("What is the Company name: ");
company=sc.next ();
System.out.prin tln("What is the type of the equipment:\n1-Mouse\n2-KeyBoard\n3-Monitor\n4-Printer ");
type=sc.nextInt ();
while((type>4)| |(type<1))
{
System.out.prin tln("Sorry, there's no such a type");
System.out.prin tln("What is the type of the equipment:\n1-Mouse\n2-KeyBoard\n3-Monitor\n4-Printer ");
type=sc.nextInt ();
}
System.out.prin tln("What is the quantity of the equipment: ");
quantity=sc.nex tInt();
System.out.prin tln("How much it costs for each equipment: ");
price=sc.nextDo uble();
}
}




The second class

import java.util.Scann er;
import java.io.*;
import java.io.File;
import javax.swing.*;
import java.io.ObjectO utputStream;
import java.io.FileOut putStream;
import java.io.Seriali zable;
//import java.io.PrintWr iter;





public class TestProjectSeri alizable
{
static int c=0;
static int eq=0;
static Project accessory[]=new Project[100];

public static void main(String args[])
{

Scanner sc=new Scanner(System. in);
int arraylength=acc essory.length;
try{
objOut = new ObjectOutputStr eam(new FileOutputStrea m("AA.txt"));


}
catch(Exception e)
{
System.out.prin tln("E");
}
int choose=0;
System.out.prin tln("** Computer Accessories Store **\n");


//arraylength-eq;
do{
System.out.prin tln("1-Add new Accessory\n2-Update Accessory(Quant ity,Price)\n3-Sell Accessory\n4-View Reports\n5-Exit");
choose=sc.nextI nt();
switch(choose)
{

case(1):
{
System.out.prin tln("How Much Equipments do you have");
eq=sc.nextInt() ;

//File file=new File("AAA.txt") ;
//OutputStream w=new ObjectOutputStr eam(file);
//OutputStream output = null;
for(int i=0;i<eq;i++)
{

System.out.prin tln("Please Fill the information for the equipment number: "+(i+1));
accessory[c]=new Project();
accessory[c].add();

try{

objOut.writeObj ect(accessory);
objOut.flush();
objOut.close();
}
catch(Exception e)
{
System.out.prin tln(e);
}
c++;
}
}
}
}
}

There's an error says that TestProjectSeri alizable is not Serializable.
please help :(