helloworldserver.c
Code:
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
int main(){
struct sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons( 10000 );
sin.sin_addr.s_addr = INADDR_ANY;
int sd = socket( AF_INET, SOCK_STREAM, 0 );
bind( sd, (struct sockaddr *)&sin, sizeof(sin) );
printf("Binding to localhost...\n");
listen( sd, 10 );
printf("Listening on Port 1000...\n");
int ssd = accept( sd, NULL, NULL );
printf("Connected to Client\n");
char message[100] = "Hello, World!";
write( ssd, message, sizeof(message) );
close( ssd );
close( sd );
}helloworldclient.c
Code:
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
int main(){
struct sockaddr_in sin;
struct hostent *hp;
hp = gethostbyname("localhost");
sin.sin_family = AF_INET;
sin.sin_port = htons( 10000 );
sin.sin_addr.s_addr = ((struct in_addr *)hp->h_addr)->s_addr;
int sd = socket( AF_INET, SOCK_STREAM, 0 );
connect( sd, (struct sockaddr *)&sin, sizeof(sin) );
printf("Connected to Server...\n");
char message[100];
read( sd, message, sizeof(message) );
printf("Message Received : %s\n",message);
}helloworldserver.c
Code:
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
int main(){
struct sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons( 10000 );
sin.sin_addr.s_addr = INADDR_ANY;
int sd = socket( AF_INET, SOCK_STREAM, 0 );
bind( sd, (struct sockaddr *)&sin, sizeof(sin) );
printf("Binding to localhost...\n");
listen( sd, 10 );
printf("Listening on Port 1000...\n");
int ssd = accept( sd, NULL, NULL );
printf("Connected to Client\n");
char message[100] = "Hello, World!";
write( ssd, message, sizeof(message) );
close( ssd );
close( sd );
}helloworldclient.c
Code:
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
int main(){
struct sockaddr_in sin;
struct hostent *hp;
hp = gethostbyname("localhost");
sin.sin_family = AF_INET;
sin.sin_port = htons( 10000 );
sin.sin_addr.s_addr = ((struct in_addr *)hp->h_addr)->s_addr;
int sd = socket( AF_INET, SOCK_STREAM, 0 );
connect( sd, (struct sockaddr *)&sin, sizeof(sin) );
printf("Connected to Server...\n");
char message[100];
read( sd, message, sizeof(message) );
printf("Message Received : %s\n",message);
}Developer Symbian]]>
Developer Symbian]]>
A small example demonstrates this pattern.
Beverage.java
Code:
public interface Beverage {
void addSugar();
void stir();
}Tea.java
Code:
public class Tea implements Beverage {
public void addSugar(){
System.out.println("Sugar Added to Tea");
}
public void stir(){
System.out.println("Tea stirred");
}
}Coffee.java
Code:
public class Coffee implements Beverage {
public void addSugar(){
System.out.println("Sugar Added to Coffee");
}
public void stir(){
System.out.println("Coffee stirred");
}
}Code:
public abstract class BeverageFactory {
public static final int COFFEE = 1;
public static final int TEA = COFFEE + 1;
public static Beverage getBeverage(int whichBeverage){
switch(whichBeverage){
case 1 : return new Coffee();
case 2 : return new Tea();
default : return null;
}
}
}FactoryTest.java
Code:
public class FactoryTest {
public static void main(String[] args){
Beverage tea = BeverageFactory.getBeverage(BeverageFactory.TEA);
tea.addSugar();
tea.stir();
Beverage coffee = BeverageFactory.getBeverage(BeverageFactory.COFFEE);
coffee.addSugar();
coffee.stir();
}
}A small example demonstrates this pattern.
Beverage.java
Code:
public interface Beverage {
void addSugar();
void stir();
}Tea.java
Code:
public class Tea implements Beverage {
public void addSugar(){
System.out.println("Sugar Added to Tea");
}
public void stir(){
System.out.println("Tea stirred");
}
}Coffee.java
Code:
public class Coffee implements Beverage {
public void addSugar(){
System.out.println("Sugar Added to Coffee");
}
public void stir(){
System.out.println("Coffee stirred");
}
}Code:
public abstract class BeverageFactory {
public static final int COFFEE = 1;
public static final int TEA = COFFEE + 1;
public static Beverage getBeverage(int whichBeverage){
switch(whichBeverage){
case 1 : return new Coffee();
case 2 : return new Tea();
default : return null;
}
}
}FactoryTest.java
Code:
public class FactoryTest {
public static void main(String[] args){
Beverage tea = BeverageFactory.getBeverage(BeverageFactory.TEA);
tea.addSugar();
tea.stir();
Beverage coffee = BeverageFactory.getBeverage(BeverageFactory.COFFEE);
coffee.addSugar();
coffee.stir();
}
}Portable Ubuntu is a windows application that allows you to use ubuntu in windows as if you are using a windows application.
Check it out]]>
Portable Ubuntu is a windows application that allows you to use ubuntu in windows as if you are using a windows application.
Check it out]]>
2. Integrated search into address bar
3. New tab opens with your favorite links and most visited pages
4. Get most of your screen
5. One-click bookmarks with categorizing
6. Shortcuts to web apps
7. Offline mode based on Google Gears
8. Tabs management
9. Independent processes for opened tabs]]>
2. Integrated search into address bar
3. New tab opens with your favorite links and most visited pages
4. Get most of your screen
5. One-click bookmarks with categorizing
6. Shortcuts to web apps
7. Offline mode based on Google Gears
8. Tabs management
9. Independent processes for opened tabs]]>
norbt
norbt allows you to create locked text and allows to give a question and answer for that text to be revealed. So that text will be only visible to those who know the answer to that question.]]>
norbt
norbt allows you to create locked text and allows to give a question and answer for that text to be revealed. So that text will be only visible to those who know the answer to that question.]]>
- Shutdown
- Restart
- Logoff
your Windows, Linux PC using Twitter!
Tweet Control is based on Twitter4J
which is an open source Java Library for Twitter API
http://yusuke.homeip.net/twitter4j/en/index.html
Tweet Control along with Twitter4J Library is attached. Check it out.]]>
- Shutdown
- Restart
- Logoff
your Windows, Linux PC using Twitter!
Tweet Control is based on Twitter4J
which is an open source Java Library for Twitter API
http://yusuke.homeip.net/twitter4j/en/index.html
Tweet Control along with Twitter4J Library is attached. Check it out.]]>
To create composition the widely used pattern is Decorator Pattern. If we take a Christmas Tree as an example, it may be decorated with Light, Candy. So if we are to inherit Christmas Tree and create each unique combination of Decoration, There will be many classes with different combination of decorations at different prices and if we introduce another deco ratable item Star then there will be a lot of code change which is harder to maintain. This is where decorator pattern comes in handy the example shows you how to implement the above scenario,
Decoratable.java
Code:
public interface Decoratable {
public double cost();
}ChristmasTree.java
Code:
public class ChristmasTree implements Decoratable {
//Price of Christmas Tree
public double cost(){
return 1.0;
}
}Light.java
Code:
public class Light implements Decoratable {
private Decoratable root;
public Light(Decoratable root){
this.root = root;
}
//Price of Light + Price of root
public double cost(){
return root.cost() + 0.5;
}
}Candy.java
Code:
public class Candy implements Decoratable {
private Decoratable root;
public Candy(Decoratable root){
this.root = root;
}
//Price of Candy + Price of root
public double cost(){
return root.cost() + 0.75;
}
}Star.java
Code:
public class Star implements Decoratable {
private Decoratable root;
public Star(Decoratable root){
this.root = root;
}
//Price of Star + Price of root
public double cost(){
return root.cost() + 1.50;
}
}DecoratorTest.java
Code:
public class DecoratorTest {
public static void main(String[] args){
//Christmas Tree without any decoration
Decoratable target = new ChristmasTree();
System.out.println("Price of the Christmas Tree " + target.cost());
//Christmas Tree decorated with Light
target = new Light(target);
System.out.println("Price of the Christmas Tree with Light " + target.cost());
//Christmas Tree decorated with Light, Candy
target = new Candy(target);
System.out.println("Price of the Christmas Tree with Light, Candy " + target.cost());
//Christmas Tree decorated with Light, Candy, Star
target = new Star(target);
System.out.println("Price of the Christmas Tree with Light, Candy, Star " + target.cost());
}
}To create composition the widely used pattern is Decorator Pattern. If we take a Christmas Tree as an example, it may be decorated with Light, Candy. So if we are to inherit Christmas Tree and create each unique combination of Decoration, There will be many classes with different combination of decorations at different prices and if we introduce another deco ratable item Star then there will be a lot of code change which is harder to maintain. This is where decorator pattern comes in handy the example shows you how to implement the above scenario,
Decoratable.java
Code:
public interface Decoratable {
public double cost();
}ChristmasTree.java
Code:
public class ChristmasTree implements Decoratable {
//Price of Christmas Tree
public double cost(){
return 1.0;
}
}Light.java
Code:
public class Light implements Decoratable {
private Decoratable root;
public Light(Decoratable root){
this.root = root;
}
//Price of Light + Price of root
public double cost(){
return root.cost() + 0.5;
}
}Candy.java
Code:
public class Candy implements Decoratable {
private Decoratable root;
public Candy(Decoratable root){
this.root = root;
}
//Price of Candy + Price of root
public double cost(){
return root.cost() + 0.75;
}
}Star.java
Code:
public class Star implements Decoratable {
private Decoratable root;
public Star(Decoratable root){
this.root = root;
}
//Price of Star + Price of root
public double cost(){
return root.cost() + 1.50;
}
}DecoratorTest.java
Code:
public class DecoratorTest {
public static void main(String[] args){
//Christmas Tree without any decoration
Decoratable target = new ChristmasTree();
System.out.println("Price of the Christmas Tree " + target.cost());
//Christmas Tree decorated with Light
target = new Light(target);
System.out.println("Price of the Christmas Tree with Light " + target.cost());
//Christmas Tree decorated with Light, Candy
target = new Candy(target);
System.out.println("Price of the Christmas Tree with Light, Candy " + target.cost());
//Christmas Tree decorated with Light, Candy, Star
target = new Star(target);
System.out.println("Price of the Christmas Tree with Light, Candy, Star " + target.cost());
}
}![[Image: Android1.jpg]](http://lh5.ggpht.com/_QPC3c0XV7a0/SpLG4b2JL6I/AAAAAAAAABk/4imkJxjXf4c/Android1.jpg)
![[Image: Android2.JPG]](http://lh3.ggpht.com/_QPC3c0XV7a0/SpLG4eyDTyI/AAAAAAAAABo/oyBX9UsMa4Y/Android2.JPG)
The UI Looks fascinating at the first glance and you can explore more.]]>
The UI Looks fascinating at the first glance and you can explore more.]]>
Code:
/*
* @author Shazin Sadakath
*
*/
public class ThreadTest implements Runnable{
public static void main(String[] args){
Thread t = new Thread(new ThreadTest());
t.setUncaughtExceptionHandler(new UncaughtExceptionHandler());
t.start();
}
public void run(){
throw new IllegalArgumentException("This is a Runtime Exception and must be caught");
}
private static class UncaughtExceptionHandler implements Thread.UncaughtExceptionHandler{
public void uncaughtException(Thread t, Throwable th){
System.out.println("Custom Error Handling");
System.out.println(t.getName() + " Threw " + th);
}
}
}Code:
/*
* @author Shazin Sadakath
*
*/
public class ThreadTest implements Runnable{
public static void main(String[] args){
Thread t = new Thread(new ThreadTest());
t.setUncaughtExceptionHandler(new UncaughtExceptionHandler());
t.start();
}
public void run(){
throw new IllegalArgumentException("This is a Runtime Exception and must be caught");
}
private static class UncaughtExceptionHandler implements Thread.UncaughtExceptionHandler{
public void uncaughtException(Thread t, Throwable th){
System.out.println("Custom Error Handling");
System.out.println(t.getName() + " Threw " + th);
}
}
}I would just like to share the code with you all. The code is not optimized. Wrote it within 2 hours.
Code:
import java.util.*;
import java.io.*;
public class AlienNumber{
private static int digits = -1;
private static int sourceIndex = -1;
private static String targetNo = null;
private static List<String> sourcenos = new ArrayList<String>();
private static List<String> targetnos = new ArrayList<String>();
private static boolean found = false;
public static void main(String[] args)throws Exception{
BufferedReader br = new BufferedReader(new FileReader(args[0]));
int noOfCases = Integer.parseInt(br.readLine().trim());
int i = 0;
while(i < noOfCases){
String[] params = br.readLine().split("\\s+");
targetNo = params[0];
createSourceNos(params[1]);
createTargetNos(params[2]);
System.out.printf("Case #%d: %s%n", (i+1), targetnos.get(sourceIndex));
clearAll();
i++;
}
}
public static void createSourceNos(String noSystem){
while(!found){
if(digits==-1){
printNos("",noSystem.substring(1), sourcenos);
}else{
printNos(sourcenos.get(digits),noSystem, sourcenos);
}
}
digits = -1;
sourceIndex = sourcenos.size()-1;
sourcenos = null;
}
public static void createTargetNos(String noSystem){
while(digits<=sourceIndex){
if(digits==-1){
printNos("",noSystem.substring(1), targetnos);
}else{
printNos(targetnos.get(digits),noSystem, targetnos);
}
}
digits = -1;
}
public static void printNos(String pre, String noSystem, List<String> nos){
for(int j=0;j<noSystem.length();j++){
String no = pre + noSystem.charAt(j);
nos.add(no);
if(no.equals(targetNo)){
found = true;
break;
}
}
digits++;
}
private static void clearAll(){
digits = -1;
sourceIndex = -1;
targetnos = null;
sourcenos = new ArrayList<String>();
targetnos = new ArrayList<String>();
found = false;
System.gc();
}
}Google Code Jam 2009]]>
I would just like to share the code with you all. The code is not optimized. Wrote it within 2 hours.
Code:
import java.util.*;
import java.io.*;
public class AlienNumber{
private static int digits = -1;
private static int sourceIndex = -1;
private static String targetNo = null;
private static List<String> sourcenos = new ArrayList<String>();
private static List<String> targetnos = new ArrayList<String>();
private static boolean found = false;
public static void main(String[] args)throws Exception{
BufferedReader br = new BufferedReader(new FileReader(args[0]));
int noOfCases = Integer.parseInt(br.readLine().trim());
int i = 0;
while(i < noOfCases){
String[] params = br.readLine().split("\\s+");
targetNo = params[0];
createSourceNos(params[1]);
createTargetNos(params[2]);
System.out.printf("Case #%d: %s%n", (i+1), targetnos.get(sourceIndex));
clearAll();
i++;
}
}
public static void createSourceNos(String noSystem){
while(!found){
if(digits==-1){
printNos("",noSystem.substring(1), sourcenos);
}else{
printNos(sourcenos.get(digits),noSystem, sourcenos);
}
}
digits = -1;
sourceIndex = sourcenos.size()-1;
sourcenos = null;
}
public static void createTargetNos(String noSystem){
while(digits<=sourceIndex){
if(digits==-1){
printNos("",noSystem.substring(1), targetnos);
}else{
printNos(targetnos.get(digits),noSystem, targetnos);
}
}
digits = -1;
}
public static void printNos(String pre, String noSystem, List<String> nos){
for(int j=0;j<noSystem.length();j++){
String no = pre + noSystem.charAt(j);
nos.add(no);
if(no.equals(targetNo)){
found = true;
break;
}
}
digits++;
}
private static void clearAll(){
digits = -1;
sourceIndex = -1;
targetnos = null;
sourcenos = new ArrayList<String>();
targetnos = new ArrayList<String>();
found = false;
System.gc();
}
}Google Code Jam 2009]]>
An instance of the uses follows;
Java Source File : ScriptTest.java
Code:
import javax.script.*;
import java.io.*;
public class ScriptTest{
public static void main(String[] args){
ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
InputStream is = null;
try{
is = new FileInputStream("script.js");
}catch(FileNotFoundException fnfe){
fnfe.printStackTrace();
}
try{
engine.eval(new InputStreamReader(is));
}catch(ScriptException e){
e.printStackTrace();
}
}
}Code:
var no1 = 10;
var no2 = 67;
var total = no1 + no2;
println("Total is " + total);Executing the ScriptTest class will print the total of the no1 and no2
by executing the .js file. At the moment by default only JavaScript is supported with this API. You can change the script.js file and see the result changing without recompiling the .java file.]]>
An instance of the uses follows;
Java Source File : ScriptTest.java
Code:
import javax.script.*;
import java.io.*;
public class ScriptTest{
public static void main(String[] args){
ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
InputStream is = null;
try{
is = new FileInputStream("script.js");
}catch(FileNotFoundException fnfe){
fnfe.printStackTrace();
}
try{
engine.eval(new InputStreamReader(is));
}catch(ScriptException e){
e.printStackTrace();
}
}
}Code:
var no1 = 10;
var no2 = 67;
var total = no1 + no2;
println("Total is " + total);Executing the ScriptTest class will print the total of the no1 and no2
by executing the .js file. At the moment by default only JavaScript is supported with this API. You can change the script.js file and see the result changing without recompiling the .java file.]]>
![[Image: google-wave-smaller-window-rm-eng.jpg]](http://www.blogcdn.com/www.engadget.com/media/2009/08/google-wave-smaller-window-rm-eng.jpg)
![[Image: google-wave-cluttered-rm-eng.jpg]](http://www.blogcdn.com/www.engadget.com/media/2009/08/google-wave-cluttered-rm-eng.jpg)
![[Image: google-wave-swedish-chef-rm-eng-1.jpg]](http://www.blogcdn.com/www.engadget.com/media/2009/08/google-wave-swedish-chef-rm-eng-1.jpg)
![[Image: google-wave-iphone-pics-rm-eng.jpg]](http://www.blogcdn.com/www.engadget.com/media/2009/08/google-wave-iphone-pics-rm-eng.jpg)
![[Image: google-wave-life-of-brian-rm-en-g1.jpg]](http://www.blogcdn.com/www.engadget.com/media/2009/08/google-wave-life-of-brian-rm-en-g1.jpg)
Source : Engadget]]>
Source : Engadget]]>
Biologically speaking every Neuron in our brain has a Thresh Hold, a maximum amount of electrical current it can tolerate. A Neuron will not fire until it exceeds this thresh hold. The input that comes into a Neuron in the form of a electrical current is called Weight if the Weight > Thresh Hold then the neuron will fire.
A Neuron can take in either one Weight or many.
The following example shows a simple Implementation of a Neuron that enables the use of And & Or operator logic.
Neuron.java
Code:
public class Neuron{
private Neuron[] neurons;
private float threshHold;
private float weight;
private boolean fired;
public Neuron(float threshHold){
this.threshHold = threshHold;
}
public void setWeight(float weight){
this.weight = weight;
}
public float getWeight(){
return weight;
}
public boolean isFired(){
return fired;
}
public void connectNeurons(Neuron... neurons){
if(neurons != null){
this.neurons = neurons;
}
}
public float fire(){
if(neurons != null){
float totalWeight = 0.0f;
for(int i=0;i<neurons.length;i++){
totalWeight += neurons[i].getWeight();
}
fired = totalWeight > threshHold;
return totalWeight;
}else if(weight != 0.0f){
fired = weight > threshHold;
return weight;
}else{
throw new RuntimeException("Neither weight nor neurons to make a decision");
}
}
}AndOperator.java
Code:
public class AndOperator{
public static void main(String[] args){
/*
* A | B | Result
* --------------
* 1 | 1 | 1
* 1 | 0 | 0
* 0 | 1 | 0
* 0 | 0 | 0
*
*/
Neuron andOperator = new Neuron(1.5f); //Threshhold is 1.5
Neuron operand1 = new Neuron(0.0f); //Threshhold is 0.0 because no decision is made
Neuron operand2 = new Neuron(0.0f); //from these neurons
operand1.setWeight(1.0f); //Both operands carry a weight of 1
operand2.setWeight(1.0f);
andOperator.connectNeurons(operand1,operand2);
//If both operands have a weight of 1 or more only
//the Neuron will fire
andOperator.fire();
System.out.println("AndOperator Result : "+andOperator.isFired());
operand1.setWeight(1.0f); //operand1 carry a weight of 1
operand2.setWeight(0.0f); //operand2 carry a weight of 0
//If both operands have a weight of 1 or more only
//the Neuron will fire
andOperator.fire();
System.out.println("AndOperator Result : "+andOperator.isFired());
}
}OrOperator.java
Code:
public class OrOperator{
public static void main(String[] args){
/*
* A | B | Result
* --------------
* 1 | 1 | 1
* 1 | 0 | 1
* 0 | 1 | 1
* 0 | 0 | 0
*
*/
Neuron andOperator = new Neuron(0.9f); //Threshhold is 0.9
Neuron operand1 = new Neuron(0.0f); //Threshhold is 0.0 because no decision is made
Neuron operand2 = new Neuron(0.0f); //from these neurons
operand1.setWeight(0.0f); //Both operands carry a weight of 0
operand2.setWeight(0.0f);
andOperator.connectNeurons(operand1,operand2);
//If both operands have a weight of 0 or less only
//the Neuron will not fire
andOperator.fire();
System.out.println("AndOperator Result : "+andOperator.isFired());
operand1.setWeight(1.0f); //operand1 carry a weight of 1
operand2.setWeight(0.0f); //operand2 carry a weight of 0
//If both operands have a weight of 0 or less only
//the Neuron will not fire
andOperator.fire();
System.out.println("AndOperator Result : "+andOperator.isFired());
}
}Biologically speaking every Neuron in our brain has a Thresh Hold, a maximum amount of electrical current it can tolerate. A Neuron will not fire until it exceeds this thresh hold. The input that comes into a Neuron in the form of a electrical current is called Weight if the Weight > Thresh Hold then the neuron will fire.
A Neuron can take in either one Weight or many.
The following example shows a simple Implementation of a Neuron that enables the use of And & Or operator logic.
Neuron.java
Code:
public class Neuron{
private Neuron[] neurons;
private float threshHold;
private float weight;
private boolean fired;
public Neuron(float threshHold){
this.threshHold = threshHold;
}
public void setWeight(float weight){
this.weight = weight;
}
public float getWeight(){
return weight;
}
public boolean isFired(){
return fired;
}
public void connectNeurons(Neuron... neurons){
if(neurons != null){
this.neurons = neurons;
}
}
public float fire(){
if(neurons != null){
float totalWeight = 0.0f;
for(int i=0;i<neurons.length;i++){
totalWeight += neurons[i].getWeight();
}
fired = totalWeight > threshHold;
return totalWeight;
}else if(weight != 0.0f){
fired = weight > threshHold;
return weight;
}else{
throw new RuntimeException("Neither weight nor neurons to make a decision");
}
}
}AndOperator.java
Code:
public class AndOperator{
public static void main(String[] args){
/*
* A | B | Result
* --------------
* 1 | 1 | 1
* 1 | 0 | 0
* 0 | 1 | 0
* 0 | 0 | 0
*
*/
Neuron andOperator = new Neuron(1.5f); //Threshhold is 1.5
Neuron operand1 = new Neuron(0.0f); //Threshhold is 0.0 because no decision is made
Neuron operand2 = new Neuron(0.0f); //from these neurons
operand1.setWeight(1.0f); //Both operands carry a weight of 1
operand2.setWeight(1.0f);
andOperator.connectNeurons(operand1,operand2);
//If both operands have a weight of 1 or more only
//the Neuron will fire
andOperator.fire();
System.out.println("AndOperator Result : "+andOperator.isFired());
operand1.setWeight(1.0f); //operand1 carry a weight of 1
operand2.setWeight(0.0f); //operand2 carry a weight of 0
//If both operands have a weight of 1 or more only
//the Neuron will fire
andOperator.fire();
System.out.println("AndOperator Result : "+andOperator.isFired());
}
}OrOperator.java
Code:
public class OrOperator{
public static void main(String[] args){
/*
* A | B | Result
* --------------
* 1 | 1 | 1
* 1 | 0 | 1
* 0 | 1 | 1
* 0 | 0 | 0
*
*/
Neuron andOperator = new Neuron(0.9f); //Threshhold is 0.9
Neuron operand1 = new Neuron(0.0f); //Threshhold is 0.0 because no decision is made
Neuron operand2 = new Neuron(0.0f); //from these neurons
operand1.setWeight(0.0f); //Both operands carry a weight of 0
operand2.setWeight(0.0f);
andOperator.connectNeurons(operand1,operand2);
//If both operands have a weight of 0 or less only
//the Neuron will not fire
andOperator.fire();
System.out.println("AndOperator Result : "+andOperator.isFired());
operand1.setWeight(1.0f); //operand1 carry a weight of 1
operand2.setWeight(0.0f); //operand2 carry a weight of 0
//If both operands have a weight of 0 or less only
//the Neuron will not fire
andOperator.fire();
System.out.println("AndOperator Result : "+andOperator.isFired());
}
}The following code snippet shows an example use of EventHandler
DynamicEventListener.java
Code:
import java.beans.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DynamicEventListener extends JFrame{
public static void main(String[] args){
new DynamicEventListener();
}
public DynamicEventListener(){
this.setSize(400,400);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLayout(new BorderLayout());
JButton button = new JButton("Quit");
// Dynamically Creating ActionListener implementation
button.addActionListener((ActionListener) EventHandler.create(ActionListener.class, this, "dispose"));
this.add(BorderLayout.NORTH,button);
this.setVisible(true);
}
}The following code snippet shows an example use of EventHandler
DynamicEventListener.java
Code:
import java.beans.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DynamicEventListener extends JFrame{
public static void main(String[] args){
new DynamicEventListener();
}
public DynamicEventListener(){
this.setSize(400,400);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLayout(new BorderLayout());
JButton button = new JButton("Quit");
// Dynamically Creating ActionListener implementation
button.addActionListener((ActionListener) EventHandler.create(ActionListener.class, this, "dispose"));
this.add(BorderLayout.NORTH,button);
this.setVisible(true);
}
}OvalShapedFrame.java
Code:
import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;
import com.sun.awt.AWTUtilities;
public class OvalShapedFrame extends JFrame{
public OvalShapedFrame(){
this.setUndecorated(true);
this.setSize(400,400);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setAlwaysOnTop(true);
try{
AWTUtilities.setWindowOpacity(this,0.8f);
AWTUtilities.setWindowShape(this,new Ellipse2D.Float(0,0,getWidth(),getHeight()/2));
}catch(Exception e){
e.printStackTrace();
}
this.setVisible(true);
}
public static void main(String[] args){
new OvalShapedFrame();
}
}![[Image: OvalShapedFrame.JPG]](http://lh4.ggpht.com/_-sOQvDwKIas/Sl6xjCohdII/AAAAAAAAADs/tclJ0MgVnFY/s144/OvalShapedFrame.JPG)
]]>OvalShapedFrame.java
Code:
import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;
import com.sun.awt.AWTUtilities;
public class OvalShapedFrame extends JFrame{
public OvalShapedFrame(){
this.setUndecorated(true);
this.setSize(400,400);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setAlwaysOnTop(true);
try{
AWTUtilities.setWindowOpacity(this,0.8f);
AWTUtilities.setWindowShape(this,new Ellipse2D.Float(0,0,getWidth(),getHeight()/2));
}catch(Exception e){
e.printStackTrace();
}
this.setVisible(true);
}
public static void main(String[] args){
new OvalShapedFrame();
}
}]]>GradientAnimation.java
import javax.swing.JFrame;
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import java.awt.event.*;
public class GradientAnimation extends JFrame{
private float x1;
private float y1;
private float x2;
private float y2;
public void paint(Graphics g){
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(new GradientPaint(x1, y1, Color.BLACK, x2, y2, Color.GREEN, true));
g2.fill(new Rectangle.Float(0,0,getWidth(),getHeight()));
}
public GradientAnimation(){
x1 = 1;
y1 = 1;
x2 = 10;
y2 = 10;
this.setSize(400,400);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
this.setVisible(true);
this.setResizable(false);
this.setTitle("Gradient Animation");
Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask(){
public void run(){
x1 += 1;
y1 += 1;
x2 += 1;
y2 += 1;
repaint();
}
},0,100);
}
public static void main(String[] args){
new GradientAnimation();
}
}]]>
GradientAnimation.java
import javax.swing.JFrame;
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import java.awt.event.*;
public class GradientAnimation extends JFrame{
private float x1;
private float y1;
private float x2;
private float y2;
public void paint(Graphics g){
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(new GradientPaint(x1, y1, Color.BLACK, x2, y2, Color.GREEN, true));
g2.fill(new Rectangle.Float(0,0,getWidth(),getHeight()));
}
public GradientAnimation(){
x1 = 1;
y1 = 1;
x2 = 10;
y2 = 10;
this.setSize(400,400);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
this.setVisible(true);
this.setResizable(false);
this.setTitle("Gradient Animation");
Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask(){
public void run(){
x1 += 1;
y1 += 1;
x2 += 1;
y2 += 1;
repaint();
}
},0,100);
}
public static void main(String[] args){
new GradientAnimation();
}
}]]>
For instance javax.swing packages event management is designed using Observer pattern. There may be several implementations of Listener (Observer) that are observing a JButton's (Observable) click, mouseEntered, mouseExited etc. events.
Following code snippet shows a small implementation of Observer Design Pattern.
Consumer.java
public class Consumer {
private String name;
public Consumer(String name){
this.name = name;
}
public void update() {
System.out.println(name + " Updated");
}
}
Producer.java
public class Producer {
private Market supplyMarket;
public Producer(Market sm){
supplyMarket = sm;
}
public void notifyMarket() {
supplyMarket.updateConsumers();
}
}
Market.java
import java.util.*;
public class Market {
private Set<Consumer> consumers;
public Market(){
consumers = new HashSet<Consumer>();
}
public void updateConsumers() {
Iterator<Consumer> it = consumers.iterator();
while(it.hasNext()){
it.next().update();
}
}
public void addConsumer(Consumer consumer){
consumers.add(consumer);
}
}
ObserverTest.java
public class ObserverTest{
public static void main(String[] args){
//Market is the Observable
Market stockMarket = new Market();
//Producer is the manipulator of the market
Producer dialog = new Producer(stockMarket);
//Consumer is the Observer of the Observable (Market)
Consumer shareHolder1 = new Consumer("Shazin");
Consumer shareHolder2 = new Consumer("Shahim");
stockMarket.addConsumer(shareHolder1);
stockMarket.addConsumer(shareHolder2);
//When there is something to be notified producer notifies
//the Market in turn market notifies all the consumers of that
//Market
dialog.notifyMarket();
}
}]]>
For instance javax.swing packages event management is designed using Observer pattern. There may be several implementations of Listener (Observer) that are observing a JButton's (Observable) click, mouseEntered, mouseExited etc. events.
Following code snippet shows a small implementation of Observer Design Pattern.
Consumer.java
public class Consumer {
private String name;
public Consumer(String name){
this.name = name;
}
public void update() {
System.out.println(name + " Updated");
}
}
Producer.java
public class Producer {
private Market supplyMarket;
public Producer(Market sm){
supplyMarket = sm;
}
public void notifyMarket() {
supplyMarket.updateConsumers();
}
}
Market.java
import java.util.*;
public class Market {
private Set<Consumer> consumers;
public Market(){
consumers = new HashSet<Consumer>();
}
public void updateConsumers() {
Iterator<Consumer> it = consumers.iterator();
while(it.hasNext()){
it.next().update();
}
}
public void addConsumer(Consumer consumer){
consumers.add(consumer);
}
}
ObserverTest.java
public class ObserverTest{
public static void main(String[] args){
//Market is the Observable
Market stockMarket = new Market();
//Producer is the manipulator of the market
Producer dialog = new Producer(stockMarket);
//Consumer is the Observer of the Observable (Market)
Consumer shareHolder1 = new Consumer("Shazin");
Consumer shareHolder2 = new Consumer("Shahim");
stockMarket.addConsumer(shareHolder1);
stockMarket.addConsumer(shareHolder2);
//When there is something to be notified producer notifies
//the Market in turn market notifies all the consumers of that
//Market
dialog.notifyMarket();
}
}]]>