diff --git a/practice/volatile1/RunVolatile.java b/practice/volatile1/RunVolatile.java
new file mode 100644
index 000000000..d72cad490
--- /dev/null
+++ b/practice/volatile1/RunVolatile.java
@@ -0,0 +1,24 @@
+package volatile1;
+
+public class RunVolatile {
+  public static void main(String[] args) {
+    RunVolatile runVolatile  = new RunVolatile();
+    runVolatile.runVolatitleSample();
+  }
+
+  public void runVolatitleSample() {
+    VolatileSample sample = new VolatileSample();
+    sample.start();
+
+    try {
+      Thread.sleep(1000);
+    } catch(Exception e) {
+      e.printStackTrace();
+    }
+
+    System.out.println("RunVolatitle : sleep() end ");
+    sample.setDouble(-1);
+    System.out.println("RunVolatitle : Set value is completed !");
+
+  }
+}
diff --git a/practice/volatile1/VolatileSample.java b/practice/volatile1/VolatileSample.java
new file mode 100644
index 000000000..0da64e7b4
--- /dev/null
+++ b/practice/volatile1/VolatileSample.java
@@ -0,0 +1,22 @@
+package volatile1;
+
+public class VolatileSample extends Thread {
+
+  private double instanceVariable = 0;
+  
+  void setDouble(double value) {
+    this.instanceVariable = value;
+  }
+
+  public void run() {
+    System.out.println("--------------------- VolatileSample : run() start ");
+    
+    while(instanceVariable == 0) {
+      System.out.println("--------------------- VolatileSample : while ing... ");
+    }
+
+    System.out.println("--------------------- VolatileSample : instanceVariable : "+instanceVariable);
+
+    System.out.println("--------------------- VolatileSample : run() end ");
+  }
+}