Java版本控制

Question

From the installation manual of Oracle's JDEdwards EnterpriseOne

JDK 1.5 is required. JDK 1.6 and higher have not been validated with EnterpriseOne as of November, 2008

As the sentence says, I need to get JDK 1.5. But the download page says Java SE 5 after Java SE 1.4 . I imposed to think Java SE 5 is JDK 1.5 . Am I right ?

Answer 1

You can download specific version of JDK 1.5 from the link you provided ( download page ).

In short, as mentioned in Oracle's official Java documentation:

Both version numbers “1.5.0″ and “5.0″ are used to identify this release of the 
Java 2 Platform Standard Edition. Version “5.0″ is the product version, while 
“1.5.0″ is the developer version. The number “5.0″ is used to better reflect the 
level of maturity, stability, scalability and security of the J2SE.

Therefore the answer is yes, Java SE X and JDK 1.X are the same thing and usually used interchangeably.

See here for a more detailed explanation of the version numbering concept in Java.

You may also want to see here for quite similar discussion.

Answer 2

You are right. Java 5 and Java 1.5 are interchangable. It's a branding thing - I think Sun decided that having something still on version 1 didn't sound great.

Answer 3

是的，Java 1.5和Java 5是一回事。