diff --git a/IndexPoint.java b/IndexPoint.java
index 8b13789..6b50006 100644
--- a/IndexPoint.java
+++ b/IndexPoint.java
@@ -1 +1,35 @@
-
+package task_1;
+import java.util.Scanner;
+/**
+ *
+ * @author Andre Anugrah
+ */
+public class IndexPoint 
+{
+    public static void main(String[] args) 
+    {
+        //input
+        Scanner input = new Scanner (System.in);
+        System.out.print("Nilai uas : ");
+        int uts = input.nextInt();
+        System.out.print("Nilai uts : ");
+        int uas = input.nextInt();
+        System.out.print("Nilai quis : ");
+        int quiz = input.nextInt();
+        
+        //program
+        double nilai = (uts*0.35)+(uas*0.4)+(quiz*0.25);
+        
+        //output
+        if (nilai >= 0 && nilai < 50)
+            System.out.println(nilai + ", Grade : Failed");
+        else if (nilai < 65)
+            System.out.println(nilai + ", Grade : Accepted");
+        else if (nilai < 75)
+            System.out.println(nilai + ", Grade : Good");
+        else if (nilai < 85)
+            System.out.println(nilai + ", Grade : Very Good");
+        else if (nilai <= 100)
+            System.out.println(nilai + ", Grade : Exellent");
+    }   
+}
diff --git a/PrimeNumber.java b/PrimeNumber.java
index 8b13789..1ff6cc2 100644
--- a/PrimeNumber.java
+++ b/PrimeNumber.java
@@ -1 +1,30 @@
-
+package task_1;
+import java.util.Scanner;
+/**
+ *
+ * @author Andre Anugrah
+ */
+public class PrimeNumber 
+{
+    public static void main(String[] args)
+    {
+        //input
+        Scanner inp = new Scanner (System.in);
+        System.out.println("Input angka : ");
+        int x = inp.nextInt();
+        
+        //program
+        int count = 0;
+	for (int i = 1; i <= x; i++){
+		if (x % i == 0){
+			count = count + 1;
+		}
+	}
+        
+        //output
+        if (count == 2)
+		System.out.println("Bilangan prima");
+	else
+		System.out.println("Bukan prima");	 
+    }
+}
diff --git a/TemperatureConvert.java b/TemperatureConvert.java
index e69de29..36cd43e 100644
--- a/TemperatureConvert.java
+++ b/TemperatureConvert.java
@@ -0,0 +1,45 @@
+package task_1;
+import java.util.Scanner;
+/**
+ *
+ * @author Andre Anugrah
+ */
+public class TemperatureConverter 
+{
+    public static void main(String[] args) 
+    {
+        //input
+        Scanner inp = new Scanner (System.in);
+        System.out.print("Masukkan suhu (celcius) : ");
+        float n = inp.nextInt();
+        
+        //program
+        int pil = 1;
+        while (pil > 0)
+        {
+            System.out.println("1. Farenheit");
+            System.out.println("2. Reamur");
+            System.out.println("3. Kelvin");
+            System.out.println("0. Exit");
+            System.out.print("Pilih : \n");
+            pil = inp.nextInt();
+            float total;
+            
+            //output
+            switch(pil){
+                case 1 :
+                        total = (n * 9/5 + 32);
+                        System.out.println(n + " Celcius = " + total + " Farenheit");
+                        break;
+                case 2 :
+                        total = (n * 4/5);
+                        System.out.println(n + " Celcius = " + total + " Reamur");
+                        break;
+                case 3 :
+                        total = (n + 273);
+                        System.out.println(n + " Celcius = " + total + " Kelvin");
+                        break;
+            }
+        }
+    }
+}