diff --git a/Answers/40231712002/.idea/.gitignore b/Answers/40231712002/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/Answers/40231712002/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/Answers/40231712002/.idea/.name b/Answers/40231712002/.idea/.name
new file mode 100644
index 0000000..002da1d
--- /dev/null
+++ b/Answers/40231712002/.idea/.name
@@ -0,0 +1 @@
+Main.java
\ No newline at end of file
diff --git a/Answers/40231712002/.idea/40231712002.iml b/Answers/40231712002/.idea/40231712002.iml
new file mode 100644
index 0000000..b107a2d
--- /dev/null
+++ b/Answers/40231712002/.idea/40231712002.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/Answers/40231712002/.idea/misc.xml b/Answers/40231712002/.idea/misc.xml
new file mode 100644
index 0000000..6f29fee
--- /dev/null
+++ b/Answers/40231712002/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40231712002/.idea/modules.xml b/Answers/40231712002/.idea/modules.xml
new file mode 100644
index 0000000..3450e56
--- /dev/null
+++ b/Answers/40231712002/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/40231712002.iml" filepath="$PROJECT_DIR$/.idea/40231712002.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40231712002/.idea/vcs.xml b/Answers/40231712002/.idea/vcs.xml
new file mode 100644
index 0000000..b2bdec2
--- /dev/null
+++ b/Answers/40231712002/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40231712002/Main.java b/Answers/40231712002/Main.java
new file mode 100644
index 0000000..1af4579
--- /dev/null
+++ b/Answers/40231712002/Main.java
@@ -0,0 +1,83 @@
+public class Main {
+    public static String fullname(String firstname, String lastname) {
+        String firstCharFirstname = firstname.substring(0, 1).toUpperCase();
+        String firstCharLastname = lastname.substring(0, 1).toUpperCase();
+        String otherfirstname = firstname.substring(1).toLowerCase();
+        String otherlastname = lastname.substring(1).toLowerCase();
+
+        return ("Name:" + firstCharFirstname + otherfirstname + firstCharLastname + otherlastname);
+
+    }
+    public static String phonenumber(String number)
+    {
+        if(number.length()==10)
+        {
+            return ("0"+number);
+        }
+        else
+        {
+            return ("Wrong entry.Try again.");
+        }
+    }
+    public static String id(String a)
+    {
+        return a;
+    }
+    public static String getlntereses(String A,String B,String C)
+    {
+        return A+B+C;
+    }
+    public static String userFullnformation(String a,String b,String c, String d)
+    {
+        return ( "Hello.My name is "+a+".My ID is "+b+".Here are some of my interests: "+c+"  " +
+                "" + "   You can reach me via my phone number "+d);
+    }
+    public static String informaionEncoder(String information,int shift)
+    {
+        String edcode ="";
+        int len = information.length();
+        for (int i = 0; i < len; i++)
+        {
+            if (information.charAt(i) == '.' || information.charAt(i) == ',' || information.charAt(i) == ' ')
+            {
+                edcode += (char) (information.charAt(i));
+            } else
+            {
+                char ch = (char) (information.charAt(i) + shift);
+                if (ch > 'z')
+                    edcode += (char) (information.charAt(i) - (26 - shift));
+                else
+                    edcode += (char) (information.charAt(i) + shift);
+            }
+        }
+        return edcode;
+    }
+    public static String informationDecoder(String information , int shift)
+    {
+        String decoder="";
+        int len = information.length();
+        for (int i = 0; i < len; i++)
+        {
+            if (information.charAt(i) == '.' || information.charAt(i) == ',' || information.charAt(i) == ' ')
+                decoder += (char) (information.charAt(i));
+            else
+            {
+                char ch=(char) (information.charAt(i)-shift);
+
+                if(ch>'z')
+                    decoder+=(char)(information.charAt(i)-(26+shift));
+                else
+                    decoder+=(char)(information.charAt(i)-shift);
+            }
+        }
+        return decoder;
+    }
+    public static void main(String[] args) {
+
+        System.out.println(fullname("kosar ", "mousavi"));
+        System.out.println(phonenumber("9114867186"));
+        System.out.println("id:"+id("40231712002"));
+        System.out.println(getlntereses("1.swimming,"," 2.cooking,"," 3.listening music"));
+        System.out.println(userFullnformation("Kosar Mousavi","40231712002","{1.swimming 2.cooking 3.listening music}","09114867186"));
+    }
+}
diff --git a/Answers/40231712002/out/production/40231712002/.idea/.gitignore b/Answers/40231712002/out/production/40231712002/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/Answers/40231712002/out/production/40231712002/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/Answers/40231712002/out/production/40231712002/.idea/.name b/Answers/40231712002/out/production/40231712002/.idea/.name
new file mode 100644
index 0000000..002da1d
--- /dev/null
+++ b/Answers/40231712002/out/production/40231712002/.idea/.name
@@ -0,0 +1 @@
+Main.java
\ No newline at end of file
diff --git a/Answers/40231712002/out/production/40231712002/.idea/40231712002.iml b/Answers/40231712002/out/production/40231712002/.idea/40231712002.iml
new file mode 100644
index 0000000..b107a2d
--- /dev/null
+++ b/Answers/40231712002/out/production/40231712002/.idea/40231712002.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/Answers/40231712002/out/production/40231712002/.idea/misc.xml b/Answers/40231712002/out/production/40231712002/.idea/misc.xml
new file mode 100644
index 0000000..6f29fee
--- /dev/null
+++ b/Answers/40231712002/out/production/40231712002/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40231712002/out/production/40231712002/.idea/modules.xml b/Answers/40231712002/out/production/40231712002/.idea/modules.xml
new file mode 100644
index 0000000..3450e56
--- /dev/null
+++ b/Answers/40231712002/out/production/40231712002/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/40231712002.iml" filepath="$PROJECT_DIR$/.idea/40231712002.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40231712002/out/production/40231712002/.idea/vcs.xml b/Answers/40231712002/out/production/40231712002/.idea/vcs.xml
new file mode 100644
index 0000000..b2bdec2
--- /dev/null
+++ b/Answers/40231712002/out/production/40231712002/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40231712002/out/production/40231712002/Main.class b/Answers/40231712002/out/production/40231712002/Main.class
new file mode 100644
index 0000000..e843dee
Binary files /dev/null and b/Answers/40231712002/out/production/40231712002/Main.class differ