LESS TALK, MORE CODE

Tuesday

Get URL content

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.HttpURLConnection;

public class Test {

public static void main(String[] args) {

BufferedWriter bw = null;

BufferedReader br = null;

String inputLine;

try {

//If you are behind a proxy you should set the following settings.

//You can look my other post to learn your own proxy infos

// System.setProperty("http.proxyHost", "your proxy host");

// System.setProperty("http.proxyPort", "your proxy port");

URL url = new URL("http://lesstalkmorecode.blogspot.com.tr/");

HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setReadTimeout(10*1000);

conn.setConnectTimeout(5*1000);

InputStream in = conn.getInputStream();

br = new BufferedReader(new InputStreamReader(in));

String fileName = "/users/content.html";

File file = new File(fileName);

if (!file.exists())

file.createNewFile();

FileWriter fw = new FileWriter(file.getAbsoluteFile());

bw = new BufferedWriter(fw);

while ((inputLine = br.readLine()) != null)

bw.write(inputLine);

} catch (MalformedURLException e) {

//log

} catch (IOException e) {

//log

} finally {

try {

if(bw != null)

bw.close();

if(br != null)

br.close();

} catch (IOException e) {

//log

}

View your proxy settings

Open Google Chrome enter below address in the bar:

chrome://net-internals/#proxy

Open cmd, write >> ipconfig /all

See >> Windows IP Configuration >> Primary Dns Suffix

Open Internet Explorer

Internet Options >> Connections >> LAN Settings
See from the pop-up address bar

Open Mozilla Firefox enter below address in the bar:

about:preferences#advanced

Address already in use: bind /127.0.0.1:9999

BUG:
While i'm trying to start JBOSS, i got following error.
Address already in use: bind /127.0.0.1:9999
FIX:
Open command prompt, then try netstat -aon.You will see the detail.

To kill the process try taskkill /f /pid PID.

Restart eclipse.Then you can change theme:
Open Eclipse Menu -> Window -> Preference -> General -> Appearance

You can change background color:
Open Eclipse Menu -> Window -> Preference -> General -> Appearance -> Color Theme

java.lang.ClassNotFoundException: com.sun.xml.ws.transport.http.servlet.WSServletContextListener

BUG:
java.lang.ClassNotFoundException: com.sun.xml.ws.transport.http.servlet.WSServletContextListener

FIX:

Download jaxws-rt-2.1.4.jar and copy it under WEB-INF/lib

https://mvnrepository.com/artifact/com.sun.xml.ws/jaxws-rt/2.1.4

java.lang.NoClassDefFoundError: com/sun/org/apache/xml/internal/resolver/CatalogManager

BUG:
java.lang.NoClassDefFoundError: com/sun/org/apache/xml/internal/resolver/CatalogManager

FIX:

Download resolver.jar and copy it under WEB-INF/lib

https://mvnrepository.com/artifact/com.sun.org.apache.xml.internal/resolver/20050927

Friday

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".

BUG:
I was getting below error. I tried slf4j-api-1.7.5.jar, slf4j-api-1.6.1.jar but it didn't fix.

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".

FIX:
Use slf4j-jdk14 in addition to slf4j-api.

Download slf4j-jdk14-1.7.5.jar:

https://mvnrepository.com/artifact/org.slf4j/slf4j-jdk14/1.7.5

For maven:

</dependency>

Tuesday

JSON.simple (a simple Java library) example

In the output section you can find the details of the example.

- Download json-simple-1.1.jar

For maven:

<groupId>com.googlecode.json-simple</groupId>

<artifactId>json-simple</artifactId>

</dependency>

OUTPUT:

--------------------createJsonText--------------------

{"PARAMETERS":[{"1":"Json 1. value"},{"2":"Json 2. value"},{"3":"Json 3. value"}],"ID":"ABCD"}

--------------------parseJsonText--------------------

ID: ABCD

PARAMETERS in order: 1. value = Json 1. value

PARAMETERS in order: 2. value = Json 2. value

PARAMETERS in order: 3. value = Json 3. value

import org.json.simple.JSONArray;

import org.json.simple.JSONObject;

import org.json.simple.parser.JSONParser;

import org.json.simple.parser.ParseException;

public class Test {

public static void main(String[] args) throws ParseException {

Test t = new Test();

String jsonString = t.createJsonText();

t.parseJsonText(jsonString);

}

@SuppressWarnings("unchecked")

public String createJsonText(){

System.out.println("--------------------createJsonText--------------------");

JSONArray ja = new JSONArray();

for(int i = 1 ; i < 4 ; i++) {

JSONObject paramsObj = new JSONObject();

paramsObj.put(i, "Json " + i + ". value");

ja.add(paramsObj);

}

JSONObject mainObj = new JSONObject();

mainObj.put("ID", "ABCD");

mainObj.put("PARAMETERS", ja);

String jsonString = mainObj.toJSONString();

System.out.println(jsonString);

return jsonString;

}

public void parseJsonText(String jsonString) throws ParseException {

System.out.println("--------------------parseJsonText--------------------");

JSONParser parser = new JSONParser();

JSONObject jo = (JSONObject) parser.parse(jsonString);

System.out.println("ID: " + (String) jo.get("ID"));

JSONArray msg1 = (JSONArray) jo.get("PARAMETERS");

if(msg1 != null) {

for (int i = 0; i < msg1.size(); i++) {

JSONObject jsonobject = (JSONObject) msg1.get(i);

System.out.println("PARAMETERS in order: " + (i+1) + ". value = " + (String)jsonobject.get(""+(i+1)));

}

Friday

Check if a web service is accessible? Ping a host for availability.

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