|
| SESSION 3 Part4 |
| Java's execute form - continued |
| |
JRE(Java Runtime Environment） |
|
|
|
|
|
|
|
|
|
 |
 |
|
 |
 |
|
|
 |
 |
|
 |
 |
|
|
|
|
|
As you can see,
to operate soft which is made
with Java,you need Runtime.
It is called
JRE..(Java Runtime Environment）
This needs to be in the computer.
By the way, JRE is described as
many ways.
Java Runtime, Java virtual machine,
JavaVM、JVM、VM・・・・
They are all the same. |
|
|
|
|
|
 |
 |
|
 |
 |
|
|
 |
 |
 |
 |
 |
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Runtime…
It is like
Java's interpreter,
isn't it?
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
It is like
Java's interpreter, isn't it?
Yeah,
that's right. It is an interpreter.
By the way, this JRE is often pre-installed
in recent computers.
But, if it isn't or with old version, it can be easily
be obtained free.
|
|
|
It has automatic online update function as well.
Now, let's make the figure to show Java's operation. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Java
"operates in various
environment once written"
by byte code and Runtime.
Correct? |
|
|
 |
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Yes!
So, if I created a game,
I can play it with anything!
Even with Pl*ystation 3!
And W*i, too!!! |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Ah…well…
Maybe, one day,
probably,
it would be nice…
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
 |
But it is not that
simple, actually… |
|
|
|
|
|
|
|
|
|
|
|
