- Addded guest contributions by Mohammad Meraj Zia.

2 files changed, 40 insertions, 0 deletions

diff --git a/challenge-185/ziameraj16/java/MacAddress.java b/challenge-185/ziameraj16/java/MacAddress.java
new file mode 100755
index 0000000000..fc4b76ffc7
--- /dev/null
+++ b/challenge-185/ziameraj16/java/MacAddress.java
@@ -0,0 +1,13 @@
+import java.util.Scanner;
+
+public class MacAddress {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("Enter Mac address");
+        String macAddress = scanner.nextLine();
+        System.out.println(String.format("%s:%s:%s:%s:%s:%s", macAddress.substring(0, 2)
+                , macAddress.substring(2, 4), macAddress.substring(5, 7), macAddress.substring(7, 9)
+                , macAddress.substring(10, 12), macAddress.substring(12)));
+    }
+}
diff --git a/challenge-185/ziameraj16/java/MaskCode.java b/challenge-185/ziameraj16/java/MaskCode.java
new file mode 100755
index 0000000000..bd2490bfe2
--- /dev/null
+++ b/challenge-185/ziameraj16/java/MaskCode.java
@@ -0,0 +1,27 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class MaskCode {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("Enter comma separated list");
+        String[] arr = scanner.nextLine().split(",");
+        List<String> list = new ArrayList(arr.length);
+        for (String str : arr) {
+            int count = 0;
+            for (int i = 0; i < str.length(); i++) {
+                if (count < 4) {
+                    char c = str.charAt(i);
+                    if (Character.isLetterOrDigit(c)) {
+                        str = str.replaceFirst(String.valueOf(c), "x");
+                        count++;
+                    }
+                }
+            }
+            list.add(str);
+        }
+        System.out.println(list);
+    }
+}