diff --git a/Bubble_sort.java b/Bubble_sort.java
new file mode 100644
index 0000000..1a6d52e
--- /dev/null
+++ b/Bubble_sort.java
@@ -0,0 +1,32 @@
+// Samuel Alferdo Astrada Napitupulu
+// FUTURE3
+public class Bubble_sort{
+	public static void main(String[] args){
+		if(args.length == 0){
+			System.out.println("Usage: java Faktorial <fak>");
+		}	
+		
+		int n = args.length;
+		
+		int[] arr;
+		arr = new int[n];
+		
+		for(int i=0;i<n;i++){
+			arr[i]=Integer.parseInt(args[i]);
+		}
+		int temp;
+		for(int i=0;i<n-1;i++){
+			for(int j=0;j<n-1;j++){
+				if(arr[j]>arr[j+1]){
+					temp=arr[j];
+					arr[j]=arr[j+1];
+					arr[j+1]=temp;
+				}
+			}
+		}
+		
+		for(int i=0;i<n;i++){
+			System.out.println(arr[i] + " ");
+		}
+	}
+}
\ No newline at end of file
diff --git a/Fak_rekursif.java b/Fak_rekursif.java
new file mode 100644
index 0000000..89ef8ac
--- /dev/null
+++ b/Fak_rekursif.java
@@ -0,0 +1,25 @@
+// Samuel Alferdo Astrada Napitupulu
+// FUTURE3
+public class Bubble_sort{
+	public static void main(String[] args){
+		if(args.length == 0){
+			System.out.println("Usage: java Faktorial <fak>");
+		}	
+		
+		int n = Integer.parseInt(args.length);
+		int temp;
+		for(int i=0;i<n-1;i++){
+			for(int j=i;j<n-1;j++){
+				if(args.length[j]<args.length[j+1]){
+					temp=args.length[j];
+					args.length[j]=args.length[j+1];
+					args.length[j+1]=temp;
+				}
+			}
+		}
+		
+		for(int i=0;i<n;i++){
+			System.out.println(args[i] + " ");
+		}
+	}
+}
\ No newline at end of file
diff --git a/Faktorial.java b/Faktorial.java
new file mode 100644
index 0000000..4879f78
--- /dev/null
+++ b/Faktorial.java
@@ -0,0 +1,15 @@
+// Samuel Alferdo Astrada Napitupulu
+// FUTURE3
+public class Faktorial{
+	public static void main(String[] args){
+		if(args.length != 1){
+			System.out.println("Usage: java Faktorial <fak>");
+		}
+		int n = Integer.parseInt(args[0]);
+		int fak=1;
+		for(int i=1;i<=n;i++){
+			fak *= i;
+		}
+		System.out.println(fak);
+	}
+}
\ No newline at end of file
diff --git a/HelloWorld.java b/HelloWorld.java
new file mode 100644
index 0000000..e1debf8
--- /dev/null
+++ b/HelloWorld.java
@@ -0,0 +1,7 @@
+// Samuel Alferdo Astrada Napitupulu
+// FUTURE3
+public class HelloWorld{
+	public static void main(String[] args){
+		System.out.println("Hello World!");
+	}
+}
\ No newline at end of file
diff --git a/Jumlah_hari.java b/Jumlah_hari.java
new file mode 100644
index 0000000..547a5f4
--- /dev/null
+++ b/Jumlah_hari.java
@@ -0,0 +1,45 @@
+// Samuel Alferdo Astrada Napitupulu
+// FUTURE3
+public class Jumlah_hari{
+	public static void main(String[] args){
+		if(args.length != 2){
+			System.out.println("Usage: java Jumlah hari <bulan> <tahun>");
+		}
+		
+		int bulan = Integer.parseInt(args[0]);
+		int tahun = Integer.parseInt(args[1]);
+		
+		switch(bulan){
+			case 1: System.out.println("31");
+			break;
+			case 2: if(((tahun%4==0) && (tahun%100!=0)) || (tahun%400==0)){
+				System.out.println("29");
+			}else{
+				System.out.println("28");
+			}
+			break;
+			case 3: System.out.println("31");
+			break;
+			case 4: System.out.println("30");
+			break;
+			case 5: System.out.println("31");
+			break;
+			case 6: System.out.println("30");
+			break;
+			case 7: System.out.println("31");
+			break;
+			case 8: System.out.println("31");
+			break;
+			case 9: System.out.println("30");
+			break;
+			case 10: System.out.println("31");
+			break;
+			case 11: System.out.println("30");
+			break;
+			case 12: System.out.println("31");
+			break;
+			default: System.out.println("-");
+			break;
+		}
+	}
+}
\ No newline at end of file
diff --git a/Score.java b/Score.java
new file mode 100644
index 0000000..3461ac8
--- /dev/null
+++ b/Score.java
@@ -0,0 +1,23 @@
+// Samuel Alferdo Astrada Napitupulu
+// FUTURE3
+public class Score{
+	public static void main(String[] args){
+		if(args.length != 1){
+			System.out.println("Usage: java Score <score>");
+		}
+		
+		int score = Integer.parseInt(args[0]);
+		
+		if(score > 80){
+			System.out.println("A");
+		}else if(score > 60){
+			System.out.println("B");
+		}else if(score > 40){
+			System.out.println("C");
+		}else if(score > 20){
+			System.out.println("D");
+		}else{
+			System.out.println("E");
+		}
+	}
+}
\ No newline at end of file