Added 25 solutions

Java/Advanced/Java Varargs - Simple Addition/Solution.java

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+//     Author: Rodney Shaghoulian
+//     Github: github.com/rshaghoulian
+// HackerRank: hackerrank.com/rshaghoulian
+
+import java.io.*;
+import java.lang.reflect.*;
+import java.util.*;
+import java.text.*;
+import java.math.*;
+import java.util.regex.*;
+
+// Use a StringBuffer instead of a String since 
+// concatening Strings is not efficient.
+class Add {
+    void add(int... numbers) {
+        StringBuffer sb = new StringBuffer();
+        int sum = 0;
+        for (int num : numbers) {
+            sb.append(num + "+");
+            sum += num;
+        }
+        sb.setCharAt(sb.length() - 1, '=');
+        sb.append(sum);
+        System.out.println(sb);
+    }
+}
+
+public class Solution {
+    public static void main(String[] args) {
+       try {
+            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+            int n1 = Integer.parseInt(br.readLine());
+            int n2 = Integer.parseInt(br.readLine());
+            int n3 = Integer.parseInt(br.readLine());
+            int n4 = Integer.parseInt(br.readLine());
+            int n5 = Integer.parseInt(br.readLine());
+            int n6 = Integer.parseInt(br.readLine());
+            Add ob = new Add();
+            ob.add(n1,n2);
+            ob.add(n1,n2,n3);
+            ob.add(n1,n2,n3,n4,n5); 
+            ob.add(n1,n2,n3,n4,n5,n6);
+            Method[] methods = Add.class.getDeclaredMethods();
+            Set<String> set = new HashSet<>();
+            boolean overload = false;
+            for (int i = 0; i < methods.length; i++) {
+                if (set.contains(methods[i].getName())) {
+                    overload = true;
+                    break;
+                }
+                set.add(methods[i].getName());
+            }
+            if (overload) {
+                throw new Exception("Overloading not allowed");
+            }
+        } catch(Exception e) {
+                e.printStackTrace();
+        }
+    }
+}