Update README.md

Author: data-flair

README.md

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-# java-tutorial
-Learn everything about Java in one tutorial. The objective is to give you all the Java resources to become job ready in Java universe
+# Java Tutorial
+
+## What is Java?
+
+Java is a versatile, object-oriented, and platform-independent programming language created by James Gosling and his team at Sun Microsystems in the mid-1990s. It has since become one of the most widely used and influential languages in the world of software development.