Confused with Java versioning

Question

Hi All,
I have downloaded JDK 5.0 update 22 from the following url:
http://java.sun.com/javase/downloads/index_jdk5.jsp
when the executable file gets downloaded it?s name is ?jdk-1_5_0_22-windows-i586-p?, which is fine, but the question is that when I give the following command:
C:\Documents and Settings\User1>javac ?versionI get
javac 1.5.0_22and when I give the command:
C:\Documents and Settings\User1>java ?versionI get
java version "1.5.0_22"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_22-b03)
Java HotSpot(TM) Client VM (build 1.5.0_22-b03, mixed mode, sharing)Does it mean that JDK 5.0 come with JRE 1.5.0?
Does it mean that I am using Java 5 or Java 1.5?
Any help that will clear this doubt, will be much appreciated.
Thanx.

Answer 1

BIJ001 wrote:
At the beginning they promised to call it version 1.x as long as the binary compatibility is maintained.
But version 1.2 they started to call it "Java 2" and so on ever since.Yes and no. The jdk was still called 1.2. The "Java 2" part did only mean 2nd generation, so JDK 1.3 was still Java 2.