Write once, run always, wouldn't that be better?

Question

The first lesson in the java course tells me that java is good because of the guarrantee that if it is written once, it will run everywhere. But wouldn't it be better if it is written once, then it would run always, on every new version of java? Now it is possible you have to recompile when you switch to a newer version of java, and have keep track of all the classes you use in your program.

Answer 1

Write once, run anywhere!