diff --git a/Arraysort.java b/Arraysort.java
new file mode 100644
index 0000000..24cf4f5
--- /dev/null
+++ b/Arraysort.java
@@ -0,0 +1,21 @@
+public class Arraysort {
+	public static void main(String[] args) {
+		int[] array = new int[args.length];
+		for(int i=0;i<args.length;i++){
+			array[i]=Integer.parseInt(args[i]);
+		}
+		for(int i=0;i<array.length;i++){
+			for(int j=i+1;j<array.length;j++){
+				if(array[i]>array[j]){
+					int temp=array[i];
+					array[i]=array[j];
+					array[j]=temp;
+				}
+			}
+		}
+		for(int i=0;i<array.length;i++){
+			System.out.print(array[i]+ " ");
+		}
+	}
+}
+
diff --git a/HelloWorld.java b/HelloWorld.java
new file mode 100644
index 0000000..245dd66
--- /dev/null
+++ b/HelloWorld.java
@@ -0,0 +1,21 @@
+
+
+public class HelloWorld {
+	public static void main(String[] args) {
+		System.out.println("Hello World!");
+		int score = Integer.parseInt(args[0]);
+		System.out.print("Grade = ");
+		if(score>=80) {
+			System.out.print("A");
+		}
+		else if(score>=60){
+			System.out.print("B");
+		}
+		else if(score>=40){
+			System.out.print("C");
+		}
+		else {
+			System.out.print("D");
+		}
+	}
+}
diff --git a/SwitchCase.java b/SwitchCase.java
new file mode 100644
index 0000000..7409bee
--- /dev/null
+++ b/SwitchCase.java
@@ -0,0 +1,40 @@
+public class SwitchCase {
+	public static void main(String[] args) {
+		/*if(args.length!=1){
+		System.err.println("Usage:MonthFromNumber <month>");return;
+		}*/
+		int year=Integer.parseInt(args[0]);
+		int month=Integer.parseInt(args[1]);
+		boolean cek=false;
+
+		cek=(((year%4==0) && !(year%100==0)) || (year%400==0))?true:false;
+		
+		System.out.print("Jumlah hari pd thn "+year+" Bulan "+month+" adalah ");
+		switch(month){
+			case 1:
+			case 3:
+			case 5:
+			case 7:
+			case 8:
+			case 10:
+			case 12:
+				System.out.print("31");
+				break;
+			case 2:
+				if(cek){
+					System.out.print("29");
+				}
+				else {System.out.print("28");
+				}	
+				break;
+			case 4:		
+			case 6:
+			case 9:
+			case 11:
+				System.out.print("30");
+				break;
+		}
+		System.out.print(" Hari ");
+		
+	}
+}
diff --git a/faktorial.java b/faktorial.java
new file mode 100644
index 0000000..3848897
--- /dev/null
+++ b/faktorial.java
@@ -0,0 +1,21 @@
+public class faktorial {
+	public static void main(String[] args) {
+		if(args.length!=1){
+		System.err.println("Usage:MonthFromNumber <month>");return;
+		}
+		int n=Integer.parseInt(args[0]);
+		if(n==0||n==1){
+			System.out.println(0);
+		}
+		else{
+			int c=1;
+			for(int i=n;i>=1;i--){
+				c*=i;
+			}
+			System.out.println(c);
+		}
+
+	}
+
+	
+}
diff --git a/fungsifaktorial.java b/fungsifaktorial.java
new file mode 100644
index 0000000..8c3b53e
--- /dev/null
+++ b/fungsifaktorial.java
@@ -0,0 +1,18 @@
+public class fungsifaktorial {
+	public static void main(String[] args) {
+		if(args.length!=1){
+		System.err.println("Usage:MonthFromNumber <month>");return;
+		}
+		int n=Integer.parseInt(args[0]);
+		System.out.print(factorial(n));
+	}
+	public static int factorial(int n){
+		if (n<=1){
+			return 1;
+		}
+		else{
+			return n*factorial(n-1);
+		}
+		
+	}
+}
\ No newline at end of file