public static void main(String[] args) {

Scanner keybd = new Scanner(System.in);

String filepath;

System.out.print("Please enter transactions file name: ");

filepath = keybd.nextLine().trim();

Processing sp = new Processing(filepath);

try

{

sp.loadFile();

sp.processTransactions();

}

catch (FileNotFoundException e)

{

e.printStackTrace();

keybd.close();

}

}

private String filepath;

private LinkedQueue allTransactions;

private LinkedQueue buyTransactions;

private int availableQty;

private int gains;

public Processing(String FilePath)

{

this.filepath = FilePath;

allTransactions = new LinkedQueue();

buyTransactions = new LinkedQueue();

}

public void loadFile() throws FileNotFoundException

{

Scanner File = new Scanner(new File(filepath));

System.out.println("The following transactions were read from the file:");

while(File.hasNextLine())

{

String line = File.nextLine().trim().toLowerCase();

if(line.isEmpty())

continue;

String[] tokens = line.split("(\\s)+");

boolean sell = tokens[0].equals("sell");

int quantity = Integer.parseInt(tokens[1]);

int price = Integer.parseInt(tokens[4].substring(1));

Transaction t = new Transaction(sell, quantity, price);

allTransactions.add(t);

System.out.println(t);

}

File.close();

}

/*

*

*

*

*

*

*

*

*/

public void processTransactions()

{

boolean error = false;

gains = 0;

availableQty = 0;

while(!allTransactions.isEmpty() && !error)

{

Transaction t = allTransactions.remove();

System.out.println("Processing transaction: " + t);

if(!t.isSell())

{

buyTransactions.add(t);

availableQty += t.getNumber();

}

else

{

int sellQty = t.getNumber();

while(sellQty > 0)

{

if(buyTransactions.isEmpty())

{

error = true;

break;

}

Transaction bt = buyTransactions.peek();

if(bt.getNumber() <= sellQty)

{

gains += (t.getPrice() - bt.getPrice()) * bt.getNumber();

sellQty -= bt.getNumber();

buyTransactions.remove();

}

else

{

gains += (t.getPrice() - bt.getPrice()) * sellQty;

bt.changeNumber(bt.getNumber() - sellQty);

sellQty = 0;

}

}

if(sellQty != 0)

{

System.out.println("Error: attempt to sell non-existing shares!");

}

else

availableQty -= t.getNumber();

}

}

if(!error)

{

System.out.println(" Capital Gain/Loss : $" + gains);

System.out.println("There are " + availableQty + " shares left");

}

}

}

Q.can you help me write method specification for each method?