diff --git a/critwarn.js b/critwarn.js
new file mode 100644
index 0000000..3a55c0f
--- /dev/null
+++ b/critwarn.js
@@ -0,0 +1,9 @@
+function replace1(str) {
+  return str.replace(/"/, '&quot');
+}
+function replace2(str) {
+  return str.replace(/&/, '&amp');
+}
+function replace3(str) {
+  return str.replace(/</, '&lt');
+}
diff --git a/md.java b/md.java
new file mode 100644
index 0000000..b5849ba
--- /dev/null
+++ b/md.java
@@ -0,0 +1,37 @@
+package com.zulip.android.util;
+
+import android.util.Log;
+
+import java.io.UnsupportedEncodingException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Gravatar example from http://en.gravatar.com/site/implement/images/java/
+ */
+public class MD5Util {
+
+    private static final String TAG = "MD5Util";
+
+    private MD5Util() {
+    }
+
+    private static String hex(byte[] array) {
+        StringBuffer sb = new StringBuffer();
+        for (int i = 0; i < array.length; ++i) {
+            sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100).substring(
+                    1, 3));
+        }
+        return sb.toString();
+    }
+
+    public static String md5Hex(String message) {
+        try {
+            MessageDigest md = MessageDigest.getInstance("MD5");
+            return hex(md.digest(message.getBytes("CP1252")));
+        } catch (NoSuchAlgorithmException | UnsupportedEncodingException e) {
+            Log.e(TAG, e.getMessage(), e);
+        }
+        return null;
+    }
+}
diff --git a/test1.java b/test1.java
new file mode 100644
index 0000000..8c66a56
--- /dev/null
+++ b/test1.java
@@ -0,0 +1,11 @@
+import java.security.*;
+
+class Test {
+  int value;
+
+  int compare(Test o) {
+    if (o.value > value) return 1;
+    return 0;
+  }
+}
+