Adding the Processing Logic

src/Order/Main.java

+/**
+ * 
+ */
+package Order;
+
+import java.util.ArrayList;
+import java.util.Scanner;
+
+import javax.swing.plaf.synth.SynthSpinnerUI;
+
+/**
+ * @author guptas
+ *
+ */
+
+class Order {
+
+	String ord_ID;
+	String type;
+	String product;
+	String pro_ID;
+	int price;
+	int qty;
+	String cust_ID;
+
+	void read() {
+		Scanner s = new Scanner(System.in);
+		this.ord_ID = s.nextLine();
+		this.type = s.next();
+		this.product = s.next();
+		this.price = s.nextInt();
+		this.qty = s.nextInt();
+		this.cust_ID = s.next();
+	}
+
+	void show() {
+		System.out.println("OrderID :" + this.ord_ID);
+		System.out.println("Type :" + this.type);
+		System.out.println("Product :" + this.product);
+		System.out.println("Price :" + this.price);
+		System.out.println("Quantity :" + this.qty);
+		System.out.println("CustomerID :" + this.cust_ID);
+
+	}
+
+	public void Process(ArrayList<Order> orders) {
+		int lenth = orders.size();
+		if("Sell".equalsIgnoreCase(this.type))
+		{
+			int i = 0;
+			while(lenth-- > 0)
+			{
+				Order o = orders.get(i++);
+				if( ("Buy".equalsIgnoreCase(o.type)) && (o.product.equalsIgnoreCase(this.product)) && (o.price >= this.price))
+				{
+					if(o.qty > this.qty)
+					{
+						o.qty -= this.qty;
+						
+//						orders.add(i-1, o);
+						System.out.println("break");
+						break;
+					}
+					else
+					{
+						this.qty -= o.qty;
+//						orders.add(lenth, this);
+						System.out.println("continue");
+						continue;
+					}
+				}
+			}
+		}
+		else if(this.type == "Buy" || this.type == "buy")
+		{
+			int i = 0;
+			while(lenth-- > 0)
+			{
+				Order o = orders.get(i++);
+				if( (o.type  == "Sell" || o.type == "sell") && (o.product.equals(this.product)) && (o.price <= this.price))
+				{
+					if(o.qty > this.qty)
+					{
+						o.qty -= this.qty;
+//						orders.add(i-1, o);
+						System.out.println("break");
+						break;
+					}
+					else
+					{
+						this.qty -= o.qty;
+//						orders.add(lenth, this);
+						System.out.println("continue");
+						continue;
+					}
+				}
+			}
+		}
+	}
+
+	public void pending(ArrayList<Order> orders) {
+		// TODO Auto-generated method stub
+		int lenth = orders.size();
+		System.out.println("Number of orders left : " + lenth);
+		int i=0;
+		while(lenth-- > 0)
+		{
+			System.out.println("\nORDER #"+(i+1));
+			Order o = orders.get(i++);
+			o.show();
+		}
+	}
+}
+
+public class Main {
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		char choice = 'n';
+		int i = 0;
+		ArrayList<Order> orders = new ArrayList<Order>();
+		do {
+			Order O1 = new Order();
+			System.out.println(
+					"Provide Order Details : \n [orderID : Type : Product : Price : Quantity : CustID]\n");
+			O1.read();  								 ///Reading new orders
+			orders.add(O1);								//Added in the list                           
+			O1.Process(orders);								// Finding the match
+			System.out.println("\nPending Orders till now are : ");
+			O1.pending(orders);								//Pending orders.
+			System.out.println("\nWant to add new order : [y/n] \n ");
+			@SuppressWarnings("resource")
+			Scanner s = new Scanner(System.in);
+			choice = s.next().charAt(0);
+		} while (choice == 'y');
+	}
+
+}

src/orders/Main.java

-/**
- * 
- */
-package orders;
-
-import java.util.Scanner;
-
-import javax.swing.plaf.synth.SynthSpinnerUI;
-
-/**
- * @author guptas
- *
- */
-class Orders{
-	
-	String ord_ID;
-	String type;
-	String product;
-	String pro_ID;
-	int price;
-	int qty;
-	String cust_ID;
-	
-	public void read()
-	{
-		Scanner s = new Scanner(System.in);
-		this.ord_ID = s.next();
-		this.type = s.next();
-		this.product = s.next();
-		this.pro_ID  = s.next();
-		this.price = s.nextInt();
-		this.qty = s.nextInt();
-		this.cust_ID = s.next();
-	}
-	public void show()
-	{
-		System.out.println("OrderID :" + this.ord_ID + "\n" );
-		System.out.println("Type :" + this.type + "\n" );
-		System.out.println("Product :" + this.product + "\n" );
-		System.out.println("ProductID :" + this.pro_ID + "\n" );
-		System.out.println("Price :" + this.price + "\n" );
-		System.out.println("Quantity :" + this.qty + "\n" );
-		System.out.println("CustomerID :" + this.cust_ID + "\n" );
-
-	}
-}
-public class Main {
-
-	/**
-	 * @param args
-	 */
-	public static void main(String[] args) {
-		// TODO Auto-generated method stub
-		Orders O1 = new Orders();
-		System.out.println("Provide Order Details : \n [orderID : Type : Product : ProductID : Price : Quantity : CustID]\n");
-		O1.read();
-		System.out.println("These are details of your order: \n");
-		O1.show();
-		
-	}
-
-}