Added 3 solutions to Java HR

varunu28 · varunu28 · commit 28508723e652 · 2018-11-12T16:48:46.000-08:00
diff --git a/Hackerrank/Java/Advanced/Covariant Return Types.java b/Hackerrank/Java/Advanced/Covariant Return Types.java
@@ -0,0 +1,58 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+//Complete the classes below
+class Flower {
+    public String whatsYourName() {
+        return "I have many names and types.";
+    }
+}
+
+class Jasmine extends Flower {
+    public String whatsYourName() {
+        return "Jasmine";
+    }
+}
+
+class Lily extends Flower {
+    public String whatsYourName() {
+        return "Lily";
+    }
+}
+
+class Region {
+    public Flower yourNationalFlower() {
+        return new Flower();
+    }
+}
+
+class WestBengal extends Region {
+    public Flower yourNationalFlower() {
+        return new Jasmine();
+    }
+}
+
+class AndhraPradesh extends Region {
+    public Flower yourNationalFlower() {
+        return new Lily();
+    }
+}
+
+public class Solution {
+  public static void main(String[] args) throws IOException {
+      BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+      String s = reader.readLine().trim();
+      Region region = null;
+      switch (s) {
+        case "WestBengal":
+          region = new WestBengal();
+          break;
+        case "AndhraPradesh":
+          region = new AndhraPradesh();
+          break;
+      }
+      Flower flower = region.yourNationalFlower();
+      System.out.println(flower.whatsYourName());
+    }
+}
diff --git a/Hackerrank/Java/Advanced/Java MD5.java b/Hackerrank/Java/Advanced/Java MD5.java
@@ -0,0 +1,20 @@
+import java.io.*;
+import java.util.*;
+import java.security.*;
+import java.math.BigInteger;
+
+public class Solution {
+
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        
+        MessageDigest md5 = MessageDigest.getInstance("MD5");
+        
+        md5.update(br.readLine().getBytes());
+        byte[] digest = md5.digest();
+        
+        for (byte b : digest) {
+            System.out.printf("%02x", b);
+        }
+    }
+}
diff --git a/Hackerrank/Java/Advanced/Java SHA-256.java b/Hackerrank/Java/Advanced/Java SHA-256.java
@@ -0,0 +1,20 @@
+import java.io.*;
+import java.util.*;
+import java.security.*;
+import java.math.BigInteger;
+
+public class Solution {
+
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        
+        MessageDigest sha = MessageDigest.getInstance("SHA-256");
+        
+        sha.update(br.readLine().getBytes());
+        byte[] digest = sha.digest();
+        
+        for (byte b : digest) {
+            System.out.printf("%02x", b);
+        }
+    }
+}
