diff --git a/BubbleSort.java b/BubbleSort.java
new file mode 100644
index 0000000..10d517c
--- /dev/null
+++ b/BubbleSort.java
@@ -0,0 +1,32 @@
+public class BubbleSort {
+
+	public static void main(String[] args) {
+
+		if(args.length == 0){
+			System.out.println("Wrong parameter input");
+			return;
+		}
+
+		int number[] = new int[25];
+		int length = args.length;
+		int temp=0;
+
+		for(int i=0; i<length; i++){
+			number[i] = Integer.parseInt(args[i]);
+		}
+
+		for(int i=0; i<length-1; i++){
+			for(int j=0; j<length-i-1; j++){
+				if(number[j] > number[j+1]){
+					temp = number[j];
+					number[j] = number[j+1];
+					number[j+1] = temp;
+				}
+			}
+		}
+
+		for(int i=0; i<length; i++){
+			System.out.println(number[i]);
+		}
+	}
+}
\ No newline at end of file
diff --git a/Calender.java b/Calender.java
new file mode 100644
index 0000000..98632e5
--- /dev/null
+++ b/Calender.java
@@ -0,0 +1,54 @@
+public class Calender {
+	public static void main(String[] args) {
+		System.out.println("This is a Nani Calender:");
+		
+		if(args.length != 1){
+			System.out.println("Wrong parameter input");
+			return;
+		}
+
+		int month = Integer.parseInt(args[0]);;
+
+		switch(month){
+			case 1:
+				System.out.println("January");
+				break;
+			case 2:
+				System.out.println("Februari");
+				break;
+			case 3:
+				System.out.println("January");
+				break;
+			case 4:
+				System.out.println("April");
+				break;
+			case 5:
+				System.out.println("Mei");
+				break;
+			case 6:
+				System.out.println("Juni");
+				break;
+			case 7:
+				System.out.println("juli");
+				break;
+			case 8:
+				System.out.println("Agustus");
+				break;
+			case 9:
+				System.out.println("September");
+				break;
+			case 10:
+				System.out.println("Oktober");
+				break;
+			case 11:
+				System.out.println("November");
+				break;
+			case 12:
+				System.out.println("Desember");
+				break;
+			default:
+				System.out.println("Not identified");
+				break;
+		}
+	}
+}
\ No newline at end of file
diff --git a/DayOfYear.java b/DayOfYear.java
new file mode 100644
index 0000000..f00b3b2
--- /dev/null
+++ b/DayOfYear.java
@@ -0,0 +1,41 @@
+public class DayOfYear {
+	public static void main(String[] args) {
+		System.out.println("This is Nani DayOfYear:");
+
+		if(args.length != 2){
+			System.out.println("Wrong parameter input");
+			return;
+		}
+
+		int year = Integer.parseInt(args[0]);
+		int month = Integer.parseInt(args[1]);
+
+		switch(month){
+			case 1:
+			case 3:
+			case 5:
+			case 7:
+			case 8:
+			case 10:
+			case 12:
+				System.out.println("31 hari");
+				break;
+			case 2:
+				if(year %4 == 0){
+					System.out.println("29 hari");	
+				} else{
+					System.out.println("28 hari");	
+				}
+				break;
+			case 4:
+			case 6:
+			case 9:
+			case 11:
+				System.out.println("30 hari");
+				break;
+			default:
+				System.out.println("Not identified");
+				break;
+		}
+	}
+}
\ No newline at end of file
diff --git a/Factorial.java b/Factorial.java
new file mode 100644
index 0000000..22012c7
--- /dev/null
+++ b/Factorial.java
@@ -0,0 +1,19 @@
+public class Factorial {
+	public static void main(String[] args) {
+		System.out.println("Hello World");
+
+		if(args.length != 1){
+			System.out.println("Wrong parameter input");
+			return;
+		}
+
+		int number = Integer.parseInt(args[0]);
+		int value=1;
+
+		for(int i=1; i<=number; i++){
+			value *= i ;
+		}
+
+		System.out.println("Factorial value: "+ value);
+	}
+}
\ No newline at end of file
diff --git a/FactorialRec.java b/FactorialRec.java
new file mode 100644
index 0000000..0381393
--- /dev/null
+++ b/FactorialRec.java
@@ -0,0 +1,24 @@
+public class FactorialRec {
+
+	public static int recursive(int num){
+		
+
+		if(num == 0 || num == 1)
+			return 1;
+		else
+			return (recursive(num-1) * num);
+
+	}
+
+	public static void main(String[] args) {
+		if(args.length != 1){
+			System.out.println("Wrong parameter input");
+			return;
+		}
+
+		int number = Integer.parseInt(args[0]);
+
+		int fact = recursive(number);
+		System.out.println("Factorial value: " + fact);
+	}
+}
\ No newline at end of file
diff --git a/HelloWorldScore.java b/HelloWorldScore.java
new file mode 100644
index 0000000..3c557e0
--- /dev/null
+++ b/HelloWorldScore.java
@@ -0,0 +1,31 @@
+public class HelloWorldScore {
+	public static void main(String[] args) {
+		System.out.println("Hello World");
+
+		if(args.length != 1){
+			System.out.println("Wrong parameter input");
+			return;
+		}
+
+		int score = Integer.parseInt(args[0]);
+
+		if(score >= 1 && score < 20){
+			System.out.println("Your score is E");	
+		}
+		else if(score >= 20 && score < 40){
+			System.out.println("Your score is D");	
+		}
+		else if(score >=40 && score < 60){
+			System.out.println("Your score is C");	
+		}
+		else if(score >=60 && score < 80){
+			System.out.println("Your score is B");	
+		}
+		else if(score >=80 && score < 100){
+			System.out.println("Your score is A");	
+		}
+		else{
+			System.out.println("Your score is not identified");
+		}
+	}
+}
\ No newline at end of file