Add README.md

README.md

+### Java programming language from core/basics concept programs
+
+#### How to run .java file extension programs
+
+Linux 
+
+```
+javac filename.java
+java filename
+```
+Windows software list
+
+```
+- Vs code
+- Intellij community
+- Eclipse
+- Sublime text
+- Any other text editors
+```