hi

src/main/java/Addition.java

@@ -0,0 +1,32 @@
+public class Addition {
+    /*
+    new file --> any name
+    new class --> Addition (accept 2 parameters, returns sum of 2 nums
+    1) test class (first)
+    2) write test cases for addition class
+    3) run test case (fails)
+    4) write code to make it pass
+    5) naming convention
+    6) statuc funcn --> print num of objects
+    7) create default constructor (print statement whenever called)
+    8) default destructor???? (print statement whenever called)
+    */
+    int num1,num2,ans;
+    static int count=0;
+    public int sum(){
+        ans=num1+num2;
+        return ans;
+    }
+    public Addition() {
+        this.num1=0;
+        this.num2=0;
+        count+=1;
+        System.out.println(count+"object(s) created");
+    }
+    public Addition(int num1, int num2) {
+        this.num1 = num1;
+        this.num2 = num2;
+        count+=1;
+        System.out.println(count+" object(s) created");
+    }
+}

src/main/java/Main.java

@@ -3,27 +3,9 @@
 
 public class Main {
     public static void main(String[] args) {
-        System.out.println("hello");
-    }
 
-    public static int add(int num1, int num2){
-        return num1+num2;
-    }
-    public static int add(int num1, int num2, int num3){
-        return num1+add(num2,num3);
-    }
-    public static int add(int num1, int num2, int num3,int num4){
-        return num1+add(num2,num3,num4);
-    }
-    public static int add(int num1, int num2, int num3,int num4, int num5){
-        return num1+add(num2,num3,num4,num5);
     }
-    public static int subtract(int num1, int num2){
-        return num1-num2;
-    }
-    public static ArrayList<Integer> desSort(ArrayList<Integer> list){
-        Collections.sort(list, Collections.reverseOrder());
-        return list;
-    }
-    // accept array return sorted in desceding order
+    /*
+
+     */
 }

src/test/java/TestAddition.java

@@ -0,0 +1,10 @@
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TestAddition {
+    @Test
+    public static void main(String[] args) {
+        Addition x = new Addition(1,2);
+        assertEquals(x.sum(),3);
+    }
+}

src/test/java/TestMain.java

@@ -8,24 +8,6 @@ public class TestMain {
     @Test
 
     public static void main(String[] args) {
-        assertEquals(Main.add(1,2),3);
-        assertEquals(Main.add(0,1,2),3);
-        assertEquals(Main.add(0,1,2,3),6);
-        assertEquals(Main.add(0,1,2,3,4),10);
-        assertEquals(Main.subtract(4,1),3);
-        ArrayList<Integer> lst = new ArrayList<Integer>();
-        lst.add(1);
-        lst.add(3);
-        lst.add(5);
-        lst.add(2);
-        lst.add(4);
-        ArrayList<Integer> lstt = new ArrayList<Integer>();
-        lstt.add(5);
-        lstt.add(4);
-        lstt.add(3);
-        lstt.add(2);
-        lstt.add(1);
-        assertEquals(Main.desSort(lst),lstt);
     }
 
 }