java是什么（What is Java）.doc

java是什么(What is Java)
What is Java?
If you want to explain what Java is absolutely ignorant of one or more difficult, yes, it is a programming language, but until today, the word Java distance beyond the definition of language, specifically, Java is a virtual machine environment, similar to the C language, including the library and support software. Allow it to run on a variety of operating system, computer equipment, and the domain of the platform, including the following:
Java SE for desktop
Java EE for server and enterprise solutions
Java ME for embedded and mobile devices
Real time Java (Real-Time Java) for temporary applications
JavaFX for building RIA applications for media applications on PC, mobile devices and televisions (set-top boxes, Blu ray players, etc.)
So, if someone says, "I'm a Java developer," they need to figure out what Java is. I'm going to talk about the future of Java from a platform perspective, including Java SE, Java EE, Java ME, JavaFX, tools and languages.
How big is the Java market?
According to Oracle, Java is the most popular and ubiquitous technology now, and the statistics in January 2010 are as follows:
9 million Java developers
840 million desktop installed with Java
More than 100 different hardware platforms support hundreds of millions of Java desktop installations
A) 2 million downloads per day
Fortune panies have all used Java
5 billion 500 million Java card
2 billion 600 million mobile phones with Java capabilities
B) 250 mobile operators partner
C) about 100000 Java ME applications
40 million TV and Blu ray player
Java is still the most widely used programming languages, more than the total add up all the scripting language, because the Java platform application programs written by different scripting languages, these figures will overlap. For example, the Java virtual machine (JVM) can execute programs written in Java, Rexx, Ruby, JavaScript, Python, PHP, Groovy, Clojure, and Scala. In many cases, Sun H