4 files changed, 49 insertions, 0 deletions
diff --git a/oop/09-pass-by-value-reference/.gitignore b/oop/09-pass-by-value-reference/.gitignore
new file mode 100644
index 0000000..6b468b6
--- /dev/null
+++ b/oop/09-pass-by-value-reference/.gitignore
@@ -0,0 +1 @@
+*.class
diff --git a/oop/09-pass-by-value-reference/Customer.java b/oop/09-pass-by-value-reference/Customer.java
new file mode 100644
index 0000000..d092a3d
--- /dev/null
+++ b/oop/09-pass-by-value-reference/Customer.java
@@ -0,0 +1,12 @@
+public class Customer {
+	private int number;
+
+	public int getNumber() {
+		return number;
+	}
+
+	public void setNumber(int number) {
+		this.number = number;
+	}
+	
+}
diff --git a/oop/09-pass-by-value-reference/PassByReference.java b/oop/09-pass-by-value-reference/PassByReference.java
new file mode 100644
index 0000000..8eb577a
--- /dev/null
+++ b/oop/09-pass-by-value-reference/PassByReference.java
@@ -0,0 +1,19 @@
+public class PassByReference {
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		Customer c = new Customer();
+		c.setNumber(5);
+		System.out.println(c.getNumber()); // 5
+		methodX(c);
+		System.out.println(c.getNumber()); // ?
+	}
+
+	public static void methodX(Customer c2) {
+		System.out.println(c2.getNumber()); // 5
+		c2.setNumber(6);
+		System.out.println(c2.getNumber()); // 6
+	}
+}
diff --git a/oop/09-pass-by-value-reference/PassByValue.java b/oop/09-pass-by-value-reference/PassByValue.java
new file mode 100644
index 0000000..2500d03
--- /dev/null
+++ b/oop/09-pass-by-value-reference/PassByValue.java
@@ -0,0 +1,17 @@
+public class PassByValue {
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		int x = 4;
+		System.out.println(x); // 4
+		method(x, 2);
+		System.out.println(x); // ?
+	}
+
+	public static void method(int x, int b) {
+		x = x + 1;
+		System.out.println(x); // 5
+	}
+}