There is given many features of java. They are also called java buzzwords. 1.Simple 2.Object-oriented 3.Platform independent 4.Secured 5.Robust 6.Architecture neutral 7.Portable 8.Dynamic 9.Interpreted 10.High Performance 11.Multithreaded 12.Distributed Simple Java is simple in the sense that: syntax is based on C++ (so easier for programmers to learn it after C++).
There is given many features of java. They are also called java buzzwords. 1.Simple 2.Object-oriented 3.Platform independent 4.Secured 5.Robust 6.Architecture neutral 7.Portable 8.Dynamic 9.Interpreted 10.High Performance 11.Multithreaded 12.Distributed Simple Java is simple in the sense that: syntax is based on C++ (so easier for programmers to learn it after C++).
Java supports two selection statements - if and switch. These statements allow us to control the flow of the program. Depending upon the expressions or values, the corresponding blocks/statements of code will be executed or by passed.
The two statements are
if statement is a conditional branch statement. This is a two way branch statement. Depending upon the whether a condition is true or false, the corresponding code is executed.
switch statement is a multiway branch statement. Depending upon the value used for switching, the corresponding code is executed.
These two statements are very powerful and are used widely across any application. They provide effective solutions for branching problems.
"Stop using Tomcat and wondering why JEE "doesn't work."
You're doing yourself a big disservice.
Start thinking about JBoss AS 6, or GlassFish v3 - Yes, I know, it's a "Full JEE Container," - it's "Heavy," but with JEE6, that's not a bad thing: It all "Just works" and it works really well. Trust me, the reason people have thought Java EE sucks, is because they try to do this stuff on Tomcat, and say "Why doesn't (JPA, JMS, JTA, EJB, JSF, CDI) work?" Well… that's because Tomcat only gives you Servlet - the Request/Response lifecycle. So people install all these things manually, or try to, and then say, "Wow, Java EE is really hard to use, shit, I'm gonna use Spring or Grails instead.""
Package java.util.concurrent.atomic
A small toolkit of classes that support lock-free thread-safe
programming on single variables.
A small toolkit of classes that support lock-free thread-safe
programming on single variables. In essence, the classes in this
package extend the notion of volatile values, fields, and
array elements to those that also provide an atomic conditional update
operation of the form:
boolean compareAndSet(expectedValue, updateValue);
Atomic classes are not general purpose replacements for
java.lang.Integer and related classes. They do not
define methods such as hashCode and
compareTo. (Because atomic variables are expected to be
mutated, they are poor choices for hash table keys.)
The specifications of these methods enable implementations to
employ efficient machine-level atomic instructions that are available
on contemporary processors.
java.util.concurrent.atomic
Class AtomicInteger
java.lang.Object
java.lang.Number
java.util.concurrent.atomic.AtomicInteger
An int value that may be updated atomically. See the
java.util.concurrent.atomic package specification for
description of the properties of atomic variables. An
AtomicInteger is used in applications such as atomically
incremented counters, and cannot be used as a replacement for an
Integer. However, this class does extend
Number to allow uniform access by tools and utilities that
deal with numerically-based classes.
int
incrementAndGet()
Atomically increments by one the current value.
Package java.util.concurrent.atomic Description
A small toolkit of classes that support lock-free thread-safe programming on single variables. In essence, the classes in this package extend the notion of volatile values, fields, and array elements to those that also provide an atomic conditional update operation of the form:
boolean compareAndSet(expectedValue, updateValue);
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