Create Readme.md

Author: devmalik7

java/RandomPasswordGenerator/Readme.md

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+# Random Password Generator
+
+## Introduction
+```
+It is a simple java code which help to generate a Long and Secure Password.
+```
+
+
+## How to use the code
+```
+1. Download the given code.
+2. Run the RandomPasswordGenerator.java file.
+3. Enter the length of the password.
+4. A long and secure password would be generated based on the length specified.
+```