In the eyes of the novice Java past life

As a non-computer trained is not a training class out of rookie small test, feel the future is not light, can only study self-taught, so decided to start from the Java language. Kidnap around some Daniel one, strongly recommended (crazy Java handouts), Daniel every weekend to give free answers. It is difficult to thoroughly understand, like the heavenly Book, the first chapter is Java's former present, like a quick. But also want to simply comb the bottom of the line of thought, tomorrow to review the wish still have harvest.

The history of the Java language:

The Java language is a powerful and easy-to-use feature relative to C + + because of its purely object-oriented orientation. Some developers use Java as a platform, and some develop it as a belief.

Static object-oriented programming language: Run first after compiling

Dynamic: Side compile side run

The so-called compilation is a syntax error in SQL

Referring to a previous life in Java, I had to mention two nouns: sun&oak

Sun Company &oak->java

Iteration Update for Java version:

96--jdk1.0

jdk1.0 includes: jre/jdk--Operating environment/development environment

JRE Five components: core/integration/user Interface api/release technology/JVM

Jdk:javac command

97--jdk1.1

ADD JIT

98--jdk1.2

Java:j2ee/j2se/j2me

API: Core/optional/Special API

02--jdk1.4

04--jdk1.5=jdkse5.0

06--jdk1.6=jdkse6.0

09 Oracle acquires Sun

11--javase7.0

In the eyes of the novice Java past life