MESSAGE
| DATE | 2015-03-25 |
| FROM | Ruben Safir
|
| SUBJECT | Subject: [LIU Comp Sci] Java Crimes
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From owner-learn-outgoing-at-mrbrklyn.com Wed Mar 25 01:30:25 2015
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Date: Wed, 25 Mar 2015 01:30:00 -0400
From: Ruben Safir
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Subject: [LIU Comp Sci] Java Crimes
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This is just my opinion and I don't really care how many people
disagreee, but java is a stupid programming language.
Read this spec. It looks like it came out of Green Eggs and Ham
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
Threads are the fundamental model of program execution in a Java program,
and the Java language and its API provide a rich set of features for the
creation
and management of threads. All Java programs comprise at least a single
thread
of control—even a simple Java program consisting of only a main() method
runs as a single thread in the JVM. Java threads are available on any
system that
provides a JVM including Windows, Linux, and Mac OS X. The Java thread API
is available for Android applications as well.
There are two techniques for creating threads in a Java program. One
approach is to create a new class that is derived from the Thread class and
to override its run() method. An alternative —and more commonly used —
technique is to define a class that implements the Runnable interface. The
Runnable interface is defined as follows:
public interface Runnable
{
public abstract void run();
}
When a class implements Runnable, it must define a run() method. The code
implementing the run() method is what runs as a separate thread.
Figure 4.12 shows the Java version of a multithreaded program that
determines the summation of a non-negative integer. The Summation class
implements the Runnable interface. Thread creation is performed by creating
an object instance of the Thread class and passing the constructor a
Runnable
object.
***Creating a Thread object does not specifically create the new thread;
rather,
the start() method creates the new thread. Calling the start() method for
the new object does two things:
1.2.It allocates memory and initializes a new thread in the JVM.
It calls the run() method, making the thread eligible to be run by the JVM.
***(Note again that we never call the run() method directly. Rather, we call
the start() method, and it calls the run() method on our behalf.)***
ehhhh... feh
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