From f0244ef106e25396c110eb50416496f0fe5ba5e2 Mon Sep 17 00:00:00 2001
From: daadaadaah <daadaadaah@gmail.com>
Date: Sun, 19 Feb 2023 17:57:35 +0900
Subject: [PATCH 1/4] =?UTF-8?q?[volatile=20=EC=B6=94=EA=B0=80=20=EC=A0=84]?=
 =?UTF-8?q?=20=EC=95=84=EB=9E=98=EC=B2=98=EB=9F=BC=20=EC=B6=9C=EB=A0=A5?=
 =?UTF-8?q?=EB=90=98=EA=B3=A0=20sample=20=EC=93=B0=EB=A0=88=EB=93=9C?=
 =?UTF-8?q?=EB=8A=94=20=EC=A2=85=EB=A3=8C=EB=90=98=EC=A7=80=20=EC=95=8A?=
 =?UTF-8?q?=EB=8A=94=EB=8B=A4.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

> 출력 결과
--------------------- VolatileSample : run() start
RunVolatitle : sleep() end
RunVolatitle : Set value is completed !
---
 practice/volatile1/RunVolatile.java    | 24 ++++++++++++++++++++++++
 practice/volatile1/VolatileSample.java | 26 ++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 practice/volatile1/RunVolatile.java
 create mode 100644 practice/volatile1/VolatileSample.java

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..e88445537
--- /dev/null
+++ b/practice/volatile1/VolatileSample.java
@@ -0,0 +1,26 @@
+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 ");
+    
+    try {
+      while(instanceVariable == 0) {
+        Thread.sleep(1);      
+      }
+    } catch(Exception e) {
+      e.printStackTrace();
+    }
+
+    System.out.println("--------------------- VolatileSample : instanceVariable : "+instanceVariable);
+
+    System.out.println("--------------------- VolatileSample : run() end ");
+  }
+}

From 09c4cb2d48419669c763e0229e0914faeaa9f4a9 Mon Sep 17 00:00:00 2001
From: daadaadaah <daadaadaah@gmail.com>
Date: Sun, 19 Feb 2023 17:58:32 +0900
Subject: [PATCH 2/4] =?UTF-8?q?[volatile=20=EC=B6=94=EA=B0=80]=20=EC=95=84?=
 =?UTF-8?q?=EB=9E=98=EC=B2=98=EB=9F=BC=20=EC=B6=9C=EB=A0=A5=EB=90=98?=
 =?UTF-8?q?=EA=B3=A0=20sample=20=EC=93=B0=EB=A0=88=EB=93=9C=EB=8A=94=20?=
 =?UTF-8?q?=EC=A2=85=EB=A3=8C=EB=90=9C=EB=8B=A4.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

> 출력 결과
--------------------- VolatileSample : run() start
RunVolatitle : sleep() end
RunVolatitle : Set value is completed !
--------------------- VolatileSample : instanceVariable : -1.0
--------------------- VolatileSample : run() end
---
 practice/volatile1/VolatileSample.java | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/practice/volatile1/VolatileSample.java b/practice/volatile1/VolatileSample.java
index e88445537..2d563c424 100644
--- a/practice/volatile1/VolatileSample.java
+++ b/practice/volatile1/VolatileSample.java
@@ -2,7 +2,7 @@
 
 public class VolatileSample extends Thread {
 
-  private double instanceVariable = 0;
+  private volatile double instanceVariable = 0;
   
   void setDouble(double value) {
     this.instanceVariable = value;
@@ -11,13 +11,7 @@ void setDouble(double value) {
   public void run() {
     System.out.println("--------------------- VolatileSample : run() start ");
     
-    try {
-      while(instanceVariable == 0) {
-        Thread.sleep(1);      
-      }
-    } catch(Exception e) {
-      e.printStackTrace();
-    }
+    while(instanceVariable == 0);
 
     System.out.println("--------------------- VolatileSample : instanceVariable : "+instanceVariable);
 

From 7e042e97a5870d992d4b40b3ff082bdbd1cd1611 Mon Sep 17 00:00:00 2001
From: daadaadaah <daadaadaah@gmail.com>
Date: Sun, 19 Feb 2023 17:59:17 +0900
Subject: [PATCH 3/4] =?UTF-8?q?volatile=EB=A1=9C=20=EC=84=A0=EC=96=B8?=
 =?UTF-8?q?=ED=95=98=EC=A7=80=20=EC=95=8A=EC=95=84=EB=8F=84=20=EC=93=B0?=
 =?UTF-8?q?=EB=A0=88=EB=93=9C=EA=B0=80=20=EB=A9=88=EC=B6=98=EB=8B=A4.=20?=
 =?UTF-8?q?=EC=99=9C=20=EA=B7=B8=EB=9F=AC=EB=8A=94=20=EA=B1=B8=EA=B9=8C=3F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

> 출력 결과
--------------------- VolatileSample : run() start
RunVolatitle : sleep() end
RunVolatitle : Set value is completed !
--------------------- VolatileSample : instanceVariable : -1.0
--------------------- VolatileSample : run() end
---
 practice/volatile1/VolatileSample.java | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/practice/volatile1/VolatileSample.java b/practice/volatile1/VolatileSample.java
index 2d563c424..e88445537 100644
--- a/practice/volatile1/VolatileSample.java
+++ b/practice/volatile1/VolatileSample.java
@@ -2,7 +2,7 @@
 
 public class VolatileSample extends Thread {
 
-  private volatile double instanceVariable = 0;
+  private double instanceVariable = 0;
   
   void setDouble(double value) {
     this.instanceVariable = value;
@@ -11,7 +11,13 @@ void setDouble(double value) {
   public void run() {
     System.out.println("--------------------- VolatileSample : run() start ");
     
-    while(instanceVariable == 0);
+    try {
+      while(instanceVariable == 0) {
+        Thread.sleep(1);      
+      }
+    } catch(Exception e) {
+      e.printStackTrace();
+    }
 
     System.out.println("--------------------- VolatileSample : instanceVariable : "+instanceVariable);
 

From fc52b19abda83e5985bfeb509c5b7d297a0b7366 Mon Sep 17 00:00:00 2001
From: daadaadaah <daadaadaah@gmail.com>
Date: Sun, 19 Feb 2023 18:01:27 +0900
Subject: [PATCH 4/4] =?UTF-8?q?while=20=EB=AC=B8=EC=97=90=20print=20?=
 =?UTF-8?q?=ED=95=A8=EC=88=98=20=EB=84=A3=EC=96=B4=EB=8F=84=20=EC=93=B0?=
 =?UTF-8?q?=EB=A0=88=EB=93=9C=EB=8A=94=20=EC=A2=85=EB=A3=8C=EB=90=9C?=
 =?UTF-8?q?=EB=8B=A4.=20=EC=99=9C=20=EA=B7=B8=EB=9F=AC=EB=8A=94=20?=
 =?UTF-8?q?=EA=B1=B8=EA=B9=8C=3F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 practice/volatile1/VolatileSample.java | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/practice/volatile1/VolatileSample.java b/practice/volatile1/VolatileSample.java
index e88445537..0da64e7b4 100644
--- a/practice/volatile1/VolatileSample.java
+++ b/practice/volatile1/VolatileSample.java
@@ -11,12 +11,8 @@ void setDouble(double value) {
   public void run() {
     System.out.println("--------------------- VolatileSample : run() start ");
     
-    try {
-      while(instanceVariable == 0) {
-        Thread.sleep(1);      
-      }
-    } catch(Exception e) {
-      e.printStackTrace();
+    while(instanceVariable == 0) {
+      System.out.println("--------------------- VolatileSample : while ing... ");
     }
 
     System.out.println("--------------------- VolatileSample : instanceVariable : "+instanceVariable);