java : add PatternFactory.java

1 files changed, 39 insertions, 0 deletions

diff --git a/java/PatternFactory.java b/java/PatternFactory.java
new file mode 100644
index 0000000..e137efe
--- /dev/null
+++ b/java/PatternFactory.java
@@ -0,0 +1,39 @@
+
+abstract class Human
+{
+    enum Gender { MALE, FEMALE }
+    abstract protected Gender construct();
+    private Gender g;
+
+    public Human() {
+        g = construct();
+    }
+
+    public void say()
+    {
+        System.out.println("I am a " + g);
+    }
+}
+
+class Female extends Human
+{
+    @Override
+    protected Gender construct() { return Gender.FEMALE; }
+}
+
+class Male extends Human
+{
+    @Override
+    protected Gender construct() { return Gender.MALE; }
+}
+
+
+public class PatternFactory {
+
+    public static void main (String [] args )
+    {
+        (new Female()).say();
+        (new Male()).say();
+    }
+}
+