Added ransom solution

ransom/Ransom.java

@@ -0,0 +1,30 @@
+import java.util.HashMap;
+import java.util.Map;
+
+public class Ransom {
+    public static boolean canRansom(String magazine, String ransom) {
+        if (magazine.length() < ransom.length()) {
+            return false;
+        }
+        Map<String, Integer> magMap = new HashMap<>();
+        for (String word : magazine.split(" ")) {
+            if (magMap.containsKey(word)) {
+                magMap.put(word, magMap.get(word) + 1);
+            } else {
+                magMap.put(word, 1);
+            }
+        }
+
+        for (String word : ransom.split(" ")) {
+            if (!magMap.containsKey(word)) {
+                return false;
+            }
+            if (magMap.get(word) == 1) {
+                magMap.remove(word);
+            } else {
+                magMap.put(word, magMap.get(word) - 1);
+            }
+        }
+        return true;
+    }
+}

ransom/RansomTest.java

@@ -0,0 +1,16 @@
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+public class RansomTest {
+
+    @Test
+    public void testCanRansom() throws Exception {
+        boolean yayRansom = Ransom.canRansom("dying wool is what you will be doing", "you will be dying");
+        System.out.println("You " + (yayRansom ? "can" : "can't") + " write a ransom letter");
+        boolean failRansom = Ransom.canRansom("can you believe Justin Beiber's new shirt?", "give me all your money");
+        System.out.println("You " + (failRansom ? "can" : "can't") + " write a ransom letter");
+
+        Assert.assertTrue(yayRansom);
+        Assert.assertFalse(failRansom);
+    }
+}