Big update: Adding all advent of codes to same repo

AdventOfCode2020/day6/day6.java

@@ -0,0 +1,64 @@
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Scanner;
+import java.io.File;
+import java.io.FileNotFoundException;
+
+class day6 {
+
+    public static void main(String[] args) {
+
+        File myFile = new File("input.txt");
+        try {
+
+            Scanner in = new Scanner(myFile);
+            ArrayList<String> inputs = new ArrayList<String>();
+            String line = "";
+            String input = "";
+
+            while (in.hasNext()) {
+                input = "";
+                input = in.nextLine();
+                if (input.length() == 0) {
+                    inputs.add(line.substring(0, line.length() - 1));
+                    line = "";
+                } else {
+                    line += input + ",";
+                }
+            }
+            
+            inputs.add(line.substring(0, line.length() - 1));
+            int sum = 0;
+
+            for (String current : inputs) {
+
+                HashMap<Character, Integer> map = new HashMap<>();
+                String[] currentSplit = current.split(",");
+
+                for (String single : currentSplit) {
+                    for (char c : single.toCharArray()) {
+
+                        if (map.get(c) == null) {
+                            map.put(c, 1);
+                        } else {
+                            map.put(c, map.get(c) + 1);
+                        }
+ 
+                    }
+                }
+
+                for (char c : map.keySet()) {
+                    if (map.get(c) == currentSplit.length) sum++;
+                }
+
+            }
+
+            System.out.printf("Total sum %d", sum);
+
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        }
+
+    }
+
+}