diff --git a/Bubblesort.java b/Bubblesort.java
new file mode 100644
index 0000000..e272152
--- /dev/null
+++ b/Bubblesort.java
@@ -0,0 +1,34 @@
+public class Bubblesort {
+
+    public static void main(String[] args) {
+        Integer howMany = args.length;
+        Integer[] inputs = new Integer[howMany];
+        for(int i = 0; i < args.length; i++)
+        {
+            inputs[i] = Integer.parseInt(args[i]);
+        }
+        inputs = sort(inputs);
+        for (int i = 0; i < inputs.length; i++)
+        {
+            System.out.println(inputs[i]);
+        }
+    }
+
+    public static Integer[] sort(Integer[] inputs)
+    {
+        for(int i = 0; i < inputs.length; i++)
+        {
+            for(int j = 0; j < inputs.length; j++)
+            {
+                if(inputs[j] > inputs[i]){
+                    inputs[j] += inputs[i];
+                    inputs[i] = inputs[j]-inputs[i];
+                    inputs[j] = inputs[j]-inputs[i];
+                }
+            }
+        }
+        
+        return inputs;
+
+    }
+}
diff --git a/Days.java b/Days.java
new file mode 100644
index 0000000..51f5365
--- /dev/null
+++ b/Days.java
@@ -0,0 +1,68 @@
+import java.util.Scanner;
+
+public class Days {
+
+    public static void main(String[] args) {
+            scoring();
+        
+    }
+
+    public static void scoring()
+    {
+        Scanner scan = new Scanner(System.in);
+        int year = scan.nextInt();
+        int month = scan.nextInt();
+        switch(month)
+        {
+            case 1: 
+                System.out.println("This month days is 31");
+                break;
+            case 2:
+            String announcedayskabisat = "this month days is 29";
+            if(year%400 == 0)
+            {
+                System.out.println(announcedayskabisat);
+            }
+            else
+            {
+                if(year%4 == 0)
+                {
+                    System.out.println(announcedayskabisat);
+                }
+                else
+                     System.out.println("This month days is 28");
+            }
+                break;
+            case 3:
+                System.out.println("This month days is 31");
+                break;
+            case 4:
+                System.out.println("This month days is 30");
+                break;
+            case 5:
+                System.out.println("This month days is 31");
+                break;
+            case 6:
+                System.out.println("This month days is 30");
+                break;
+            case 7:
+                System.out.println("This month days is 31");
+                break;
+            case 8:
+                System.out.println("This month days is 30");
+                break;
+            case 9:
+                System.out.println("This month days is 31");
+                break;
+            case 10:
+                System.out.println("This month days is 31");
+                break;
+            case 11:
+                System.out.println("This month days is 31");
+                break;
+            case 12:
+                System.out.println("This month days is 31"); 
+                break;               
+        }
+    }
+}
diff --git a/Iteration.java b/Iteration.java
new file mode 100644
index 0000000..e9e7c4a
--- /dev/null
+++ b/Iteration.java
@@ -0,0 +1,25 @@
+import java.util.Scanner;
+
+public class Iteration {
+
+    public static void main(String[] args) {
+        if(args.length < 1)
+        {}
+        else{
+            int score = Integer.parseInt(args[0]);
+            System.out.println(scoring(score));
+        }
+        
+    }
+
+    public static int scoring(int score)
+    {
+        int hasilFactorial = score;
+        for(int i = score; i > 0; i--)
+        {
+            if(i > 1)
+                hasilFactorial *= (i-1);
+        }
+        return hasilFactorial;
+    }
+}
diff --git a/Months.java b/Months.java
new file mode 100644
index 0000000..7617852
--- /dev/null
+++ b/Months.java
@@ -0,0 +1,59 @@
+import java.util.Scanner;
+
+public class Switch {
+
+    public static void main(String[] args) {
+        if(args.length < 1)
+        {
+            System.out.println("Please input 1 - 12");
+        }
+        else{
+            int month = Integer.parseInt(args[0]);
+            scoring(month);
+        }
+        
+    }
+
+    public static void scoring(int month)
+    {
+        switch(month)
+        {
+            case 1:
+                System.out.println("Month is January");
+                break;
+            case 2:
+                System.out.println("Month is February");
+                break;
+            case 3:
+                System.out.println("Month is March");
+                break;
+            case 4:
+                System.out.println("Month is April");
+                break;
+            case 5:
+                System.out.println("Month is May");
+                break;
+            case 6:
+                System.out.println("Month is June");
+                break;
+            case 7:
+                System.out.println("Month is July");
+                break;
+            case 8:
+                System.out.println("Month is August");
+                break;
+            case 9:
+                System.out.println("Month is September");
+                break;
+            case 10:
+                System.out.println("Month is October");
+                break;
+            case 11:
+                System.out.println("Month is November");
+                break;
+            case 12:
+                System.out.println("Month is December"); 
+                break;               
+        }
+    }
+}
diff --git a/Recursive.java b/Recursive.java
new file mode 100644
index 0000000..0990977
--- /dev/null
+++ b/Recursive.java
@@ -0,0 +1,22 @@
+import java.util.Scanner;
+
+public class Recursive {
+
+    public static void main(String[] args) {
+        if(args.length < 1)
+        {}
+        else{
+            int score = Integer.parseInt(args[0]);
+            int hasilFactorial = score;
+            System.out.println(scoring(score));
+        }
+        
+    }
+
+    public static int scoring(int score)
+    {
+        if(score > 0)
+            return score * scoring(score-1);
+        return score;
+    }
+}
diff --git a/Scoring.java b/Scoring.java
new file mode 100644
index 0000000..85acda0
--- /dev/null
+++ b/Scoring.java
@@ -0,0 +1,38 @@
+import java.util.Scanner;
+
+public class Scoring {
+
+    public static void main(String[] args) {
+        if(args.length < 1)
+        {}
+        else{
+            int score = Integer.parseInt(args[0]);
+            scoring(score);
+        }
+        
+    }
+
+    public static void scoring(int score)
+    {
+        if(score > 80)
+        {
+            System.out.println("    Score is A");
+        }
+        else if(score > 60)
+        {
+            System.out.println("    Score is B");
+        }
+        else if(score > 40)
+        {
+            System.out.println("    Score is C");
+        }
+        else if(score > 20)
+        {
+            System.out.println("    Score is D");
+        }
+        else
+        {
+            System.out.println("    Score is E");
+        }
+    }
+}