inital commit

lab05/src/BankAccount.java

@@ -0,0 +1,65 @@
+
+/**
+ * BankAccount class that represents a real world entity Bank Account. It supports deposit, withdrawal 
+ * and checking balance operations.
+ * 
+ * @author Pratap Kotala 
+ * @version 9/23/2014
+ */
+public class BankAccount
+{
+    //instance variable balance to store the balance amount information
+    private double balance;
+
+    /**
+     * Default constructor for objects of class BankAccount which initializes balance to zero.
+     */
+    public BankAccount()
+    {
+        // initialise instance variables
+        balance = 0;
+    }
+
+    /**
+     * Constructor for objects of class BankAccount which initializes balance to amount.
+     */
+    public BankAccount(double amount)
+    {
+        balance = amount;
+    }
+    /**
+     * getBalance() method returns the current balance
+     * 
+     * @param      no parameter
+     * @return     double 
+     */
+    public double getBalance()
+    {
+       return balance;
+    }
+    
+    /**
+     * deposit() method adds the amount to the current balance
+     * 
+     * @param      double amount
+     * @return     void 
+     */
+    public void deposit(double amount)
+    {
+        balance += amount;        
+    }
+    
+    /**
+     * withdraw() method reduces the current balance by amount
+     * 
+     * @param      double amount
+     * @return     void 
+     */
+    public void withdraw(double amount)
+    {
+        if (amount > balance)
+            throw new IllegalArgumentException("insufficient balance");
+        else
+            balance -= amount;
+    }
+}