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September 17, 2014

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Bluetooth Remote on Android to Control Presentations on PC

B eing in the networking field for a while i had an interest to develop something on Bluetooth or wi-fi also I have always thought of controlling my laptop from my Android phone, so i targeted Bluetooth. So here it is " an idea to make my Android phone become a simple remote control for my laptop, just for controlling the Power Point slides for presentation" . To make it possible i have to go through following challenges: Remote server on PC A way to generate events on remote PC Remote Controller on Android For generating events(2) on PC u need " java.awt.Robot & java.awt.event.InputEvent " classes . (Google it for more info) REMOTE CONTROL SERVER (Java): Firstly, we need to write the remote control server to receive the signal from Android phone. I used a Java library for Bluetooth called Bluecove to implement...

Compile Time Constants in Java

Compile Time Constants in Java In this tutorial we’ll get a basic understanding of Compile Time Constants in Java programming language. This is not an exhaustive tutorial about compile time constants, but this should be enough for most people. We’ll understand what compile time constants are and how are they special. First lets go through the general rules regarding compile time constants. They must be declared final They are of primitive data types or String They must be initialized with their declaration. Their value must be constant expression. If you don’t understand all of this, don’t worry, we’ll go through these rules now. Final variables of primitive data types and Strings can be compile time constants. No other type of variables are compile time constants, not even the wrapper classes. They must also be initialized with their declaration, otherwise they’ll not be compile time constants. Lets take a few examples. All of the following are compile time const...

Memory Model Java

The Java memory model specifies how the Java virtual machine works with the computer's memory (RAM). The Java virtual machine is a model of a whole computer so this model naturally includes a memory model - AKA the Java memory model. It is very important to understand the Java memory model if you want to design correctly behaving concurrent programs. The Java memory model specifies how and when different threads can see values written to shared variables by other threads, and how to synchronize access to shared variables when necessary. The original Java memory model was insufficient, so the Java memory model was revised in Java 1.5. This version of the Java memory model is still in use in Java 8. The Internal Java Memory Model The Java memory model used internally in the JVM divides memory between thread stacks and the heap. This diagram illustrates the Java memory model from a logic perspective: Each thread running in the Java virtual machine has its own thread stack...

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