James Gosling, generally credited as the inventor of the Java programming language in 1994. He created the original design of Java and implemented its original compiler and virtual machine. For this achievement he was elected to the United States National Academy of Engineering. On April 2, 2010, he left Sun Microsystems which had recently been acquired by the Oracle Corporation.
2. Hibernate Founder---
Gravin-king
Gavin King, is the founder of the
Hibernate project, a popular object/relational persistence solution for
Java, and the creator of Seam, an application framework for Java EE 5.
Furthermore, he contributed heavily to the design of EJB 3.0 and JPA.
Rod Johnson, is the founder of the Spring Framework, an open source
application framework for Java, Creator of Spring, CEO at SpringSource.
Furthermore, Rod’s best-selling Expert One-on-One J2EE Design and
Development (2002) was one of the most influential books ever published
on J2EE.
4. Struts Founder---
Craig-McClanahan
Craig Mcclanahan, creator of Struts, a
popular open source MVC framework for building Java-based web
applications, which is arguably that every Java developer know how to
code Struts. With the huge success of Struts in early day, it’s widely
implemented in every single of the old Java web application project.
5. JBoss Founder---
Marc-Fleury
Marc Fleury, who founded JBoss in 2001,
an open-source Java application server, arguably the de facto standard
for deploying Java-based Web applications. Later he sold the JBoss to
RedHat, and joined RedHat to continue support on the JBoss development.
On 9 February 2007, he decided to leave Red Hat to pursue other personal
interests, such as teaching, research in biology, music and his family.
6. Java Collections Framework---
Joshua-Bloch
Joshua Bloch, led the design and
implementation of numerous Java platform features, including JDK 5.0
language enhancements and the award-winning Java Collections Framework.
In June 2004 he left Sun and became Chief Java Architect at Google.
Furthermore, he won the prestigious Jolt Award from Software Development
Magazine for his book, “Effective Java”, which is arguably a must read
Java’s book.
7. Test Driven Development & JUnit Founder---Kent-Beck
Kent Beck, creator of the Extreme
Programming and Test Driven Development software development
methodologies. Furthermore, he and Erich Gamma created JUnit, a simple
testing framework, which turn into the de facto standard for testing
Java-based Web applications. The combine of JUnit and Test Driven
Development makes a big changed on the way of coding Java, which causes
many Java developers are not willing to follow it.
8. Tomcat & Ant Founder---
James-Duncan-Davidson
James Duncan Davidson, while he was
software engineer at Sun Microsystems (1997–2001), created Tomcat
Java-based web server, still widely use in most of the Java web
projects, and also Ant build tool, which uses XML to describe the build
process and its dependencies, which is still the de facto standard for
building Java-based Web applications.
atyamsoft 
James Gosling, generally credited as the inventor of the Java programming language in 1994. He created the original design of Java and implemented its original compiler and virtual machine. For this achievement he was elected to the United States National Academy of Engineering. On April 2, 2010, he left Sun Microsystems which had recently been acquired by the Oracle Corporation.
