3 files changed, 71 insertions, 0 deletions
diff --git a/oop/04-constructors/.gitignore b/oop/04-constructors/.gitignore
new file mode 100644
index 0000000..6b468b6
--- /dev/null
+++ b/oop/04-constructors/.gitignore
@@ -0,0 +1 @@
+*.class
diff --git a/oop/04-constructors/Account.java b/oop/04-constructors/Account.java
new file mode 100644
index 0000000..82875be
--- /dev/null
+++ b/oop/04-constructors/Account.java
@@ -0,0 +1,47 @@
+
+public class Account {
+	
+	/* Declaring fields  - represent state */
+	
+	int accountNumber;
+	double balance;
+	
+	// No argument constructor
+	public Account() {
+		System.out.println("No argument constructor");
+	}
+	
+	// A constructor with an argument
+	public Account(double initialBalance) {
+		balance = initialBalance;
+		System.out.println("Argument constructor");
+	}
+	
+	/* Declaring methods - represent operations */
+	
+	public void withdraw(double amount) {
+		if (balance >= amount) {
+			balance = balance - amount;
+		}
+	}
+
+	// Overloaded method
+	public void deposit(double amount) {
+		balance += amount;
+	}
+	
+	// Overloaded method
+	public void deposit(int amount) {
+		balance += amount;
+	}
+
+	
+	public double getBalance() {
+		return balance;
+	}
+	
+	
+//	public int getBalance() {
+//		return 1;
+//	}
+}
diff --git a/oop/04-constructors/AccountTest.java b/oop/04-constructors/AccountTest.java
new file mode 100644
index 0000000..9774e84
--- /dev/null
+++ b/oop/04-constructors/AccountTest.java
@@ -0,0 +1,23 @@
+
+public class AccountTest {
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		Account a1 = new Account(); // Instantiation of 'Account' class
+		Account a2 = new Account(10.0);
+		
+		System.out.println(a1.getBalance());
+		
+		a1.deposit(100.0);
+		System.out.println(a1.getBalance());
+		
+		a1.withdraw(50.0);
+		System.out.println(a1.getBalance());
+		
+		a2.deposit(100.0);
+		System.out.println(a2.getBalance());
+	}
+
+}