From da5d5671e376e418afbaa217e962e447f9f4a5ec Mon Sep 17 00:00:00 2001
From: kim <haerong22@naver.com>
Date: Mon, 18 Jan 2021 16:23:29 +0900
Subject: [PATCH] State Pattern

---
 design-pattern/src/State/Application.java | 22 +++++++++++
 design-pattern/src/State/Light.java       | 48 +++++++++++++++++++++++
 design-pattern/src/State/State            |  2 +
 3 files changed, 72 insertions(+)
 create mode 100644 design-pattern/src/State/Application.java
 create mode 100644 design-pattern/src/State/Light.java
 create mode 100644 design-pattern/src/State/State

diff --git a/design-pattern/src/State/Application.java b/design-pattern/src/State/Application.java
new file mode 100644
index 00000000..f6f8a006
--- /dev/null
+++ b/design-pattern/src/State/Application.java
@@ -0,0 +1,22 @@
+package State;
+
+public class Application {
+    public static void main(String[] args) {
+        Light light = new Light();
+
+        light.off();
+        light.off();
+        light.off();
+
+        light.on();
+        light.on();
+        light.on();
+
+        light.off();
+        light.on();
+        light.off();
+        light.on();
+        light.off();
+        light.on();
+    }
+}
diff --git a/design-pattern/src/State/Light.java b/design-pattern/src/State/Light.java
new file mode 100644
index 00000000..c7234249
--- /dev/null
+++ b/design-pattern/src/State/Light.java
@@ -0,0 +1,48 @@
+package State;
+
+public class Light {
+
+    protected LightState lightState;
+
+    private LightState offState = new LightState() {
+        @Override
+        public void on() {
+            System.out.println("Light ON");
+            lightState = onState;
+        }
+
+        @Override
+        public void off() {
+            System.out.println("Nothing");
+        }
+    };
+
+    private LightState onState = new LightState() {
+        @Override
+        public void on() {
+            System.out.println("Nothing");
+        }
+
+        @Override
+        public void off() {
+            System.out.println("Light OFF");
+            lightState = offState;
+        }
+    };
+
+    public Light() {
+        lightState = offState;
+    }
+
+    public void on() {
+        lightState.on();
+    }
+    public void off() {
+        lightState.off();
+    }
+}
+
+interface LightState {
+    void on();
+    void off();
+}
\ No newline at end of file
diff --git a/design-pattern/src/State/State b/design-pattern/src/State/State
new file mode 100644
index 00000000..c0f0c396
--- /dev/null
+++ b/design-pattern/src/State/State
@@ -0,0 +1,2 @@
+State pattern
+ - 상태를 객체로 나타내기
\ No newline at end of file