Java serves as both a programming language and a platform. It is a sophisticated, secure, and object-oriented programming language. Sun Microsystems (now a subsidiary of Oracle) developed Java in 1995, and its conception is credited to James Gosling, often referred to as the father of Java. Originally named Oak, the language underwent a name change to Java when it was discovered that the name Oak was already claimed by another company. Regarding its platform designation, Java qualifies as such because it can operate within various hardware or software environments. This is due to its inclusion of a runtime environment (JRE) and API, which enables it to function as a self-sustained platform for running applications. Please read this carefully and hopefully you will find it helpful. This book has been written with advise of multiple experts who have command over JAVA programming. They have couple of years experiance in JAVA. Please reach out to email ummedsingh7427@gmail.com for any suggestion, query or questions. Thank you.