How to get the list of countries in java

/**
 * How to get the list of countries in java
 */
package com.belazy.stackoverflow;

import java.util.Locale;

/**
 * @author it section kozhikode
 *
 */
public class CountriesList {

/**
* @param cfed
*/
public static void main(String[] cfed) {
// TODO Auto-generated method stub
String[] locales = Locale.getISOCountries();
for(String locale : locales){
System.out.print(locale+ "   ");
Locale locCon = new Locale("", locale);
System.out.println(locCon.getDisplayCountry()+" "+locCon.getDisplayLanguage());
}

}

}

Output

AD   Andorra 

AE   United Arab Emirates 

AF   Afghanistan 

AG   Antigua and Barbuda 

AI   Anguilla 

AL   Albania 

AM   Armenia 

AN   Netherlands Antilles 

AO   Angola 

AQ   Antarctica 

AR   Argentina 

AS   American Samoa 

AT   Austria 

AU   Australia 

AW   Aruba 

AX   Åland Islands 

AZ   Azerbaijan 

BA   Bosnia and Herzegovina 

BB   Barbados 

BD   Bangladesh 

BE   Belgium 

BF   Burkina Faso 

BG   Bulgaria 

BH   Bahrain 

BI   Burundi 

BJ   Benin 

BL   Saint Barthélemy 

BM   Bermuda 

BN   Brunei 

BO   Bolivia 

BQ   Bonaire, Sint Eustatius and Saba 

BR   Brazil 

BS   Bahamas 

BT   Bhutan 

BV   Bouvet Island 

BW   Botswana 

BY   Belarus 

BZ   Belize 

CA   Canada 

CC   Cocos Islands 

CD   The Democratic Republic Of Congo 

CF   Central African Republic 

CG   Congo 

CH   Switzerland 

CI   Côte d'Ivoire 

CK   Cook Islands 

CL   Chile 

CM   Cameroon 

CN   China 

CO   Colombia 

CR   Costa Rica 

CS   Serbia and Montenegro 

CU   Cuba 

CV   Cape Verde 

CW   Curaçao 

CX   Christmas Island 

CY   Cyprus 

CZ   Czech Republic 

DE   Germany 

DJ   Djibouti 

DK   Denmark 

DM   Dominica 

DO   Dominican Republic 

DZ   Algeria 

EC   Ecuador 

EE   Estonia 

EG   Egypt 

EH   Western Sahara 

ER   Eritrea 

ES   Spain 

ET   Ethiopia 

FI   Finland 

FJ   Fiji 

FK   Falkland Islands 

FM   Micronesia 

FO   Faroe Islands 

FR   France 

GA   Gabon 

GB   United Kingdom 

GD   Grenada 

GE   Georgia 

GF   French Guiana 

GG   Guernsey 

GH   Ghana 

GI   Gibraltar 

GL   Greenland 

GM   Gambia 

GN   Guinea 

GP   Guadeloupe 

GQ   Equatorial Guinea 

GR   Greece 

GS   South Georgia And The South Sandwich Islands 

GT   Guatemala 

GU   Guam 

GW   Guinea-Bissau 

GY   Guyana 

HK   Hong Kong 

HM   Heard Island And McDonald Islands 

HN   Honduras 

HR   Croatia 

HT   Haiti 

HU   Hungary 

ID   Indonesia 

IE   Ireland 

IL   Israel 

IM   Isle Of Man 

IN   India 

IO   British Indian Ocean Territory 

IQ   Iraq 

IR   Iran 

IS   Iceland 

IT   Italy 

JE   Jersey 

JM   Jamaica 

JO   Jordan 

JP   Japan 

KE   Kenya 

KG   Kyrgyzstan 

KH   Cambodia 

KI   Kiribati 

KM   Comoros 

KN   Saint Kitts And Nevis 

KP   North Korea 

KR   South Korea 

KW   Kuwait 

KY   Cayman Islands 

KZ   Kazakhstan 

LA   Laos 

LB   Lebanon 

LC   Saint Lucia 

LI   Liechtenstein 

LK   Sri Lanka 

LR   Liberia 

LS   Lesotho 

LT   Lithuania 

LU   Luxembourg 

LV   Latvia 

LY   Libya 

MA   Morocco 

MC   Monaco 

MD   Moldova 

ME   Montenegro 

MF   Saint Martin 

MG   Madagascar 

MH   Marshall Islands 

MK   Macedonia 

ML   Mali 

MM   Myanmar 

MN   Mongolia 

MO   Macao 

MP   Northern Mariana Islands 

MQ   Martinique 

MR   Mauritania 

MS   Montserrat 

MT   Malta 

MU   Mauritius 

MV   Maldives 

MW   Malawi 

MX   Mexico 

MY   Malaysia 

MZ   Mozambique 

NA   Namibia 

NC   New Caledonia 

NE   Niger 

NF   Norfolk Island 

NG   Nigeria 

NI   Nicaragua 

NL   Netherlands 

NO   Norway 

NP   Nepal 

NR   Nauru 

NU   Niue 

NZ   New Zealand 

OM   Oman 

PA   Panama 

PE   Peru 

PF   French Polynesia 

PG   Papua New Guinea 

PH   Philippines 

PK   Pakistan 

PL   Poland 

PM   Saint Pierre And Miquelon 

PN   Pitcairn 

PR   Puerto Rico 

PS   Palestine 

PT   Portugal 

PW   Palau 

PY   Paraguay 

QA   Qatar 

RE   Reunion 

RO   Romania 

RS   Serbia 

RU   Russia 

RW   Rwanda 

SA   Saudi Arabia 

SB   Solomon Islands 

SC   Seychelles 

SD   Sudan 

SE   Sweden 

SG   Singapore 

SH   Saint Helena 

SI   Slovenia 

SJ   Svalbard And Jan Mayen 

SK   Slovakia 

SL   Sierra Leone 

SM   San Marino 

SN   Senegal 

SO   Somalia 

SR   Suriname 

ST   Sao Tome And Principe 

SV   El Salvador 

SX   Sint Maarten (Dutch part) 

SY   Syria 

SZ   Swaziland 

TC   Turks And Caicos Islands 

TD   Chad 

TF   French Southern Territories 

TG   Togo 

TH   Thailand 

TJ   Tajikistan 

TK   Tokelau 

TL   Timor-Leste 

TM   Turkmenistan 

TN   Tunisia 

TO   Tonga 

TR   Turkey 

TT   Trinidad and Tobago 

TV   Tuvalu 

TW   Taiwan 

TZ   Tanzania 

UA   Ukraine 

UG   Uganda 

UM   United States Minor Outlying Islands 

US   United States 

UY   Uruguay 

UZ   Uzbekistan 

VA   Vatican 

VC   Saint Vincent And The Grenadines 

VE   Venezuela 

VG   British Virgin Islands 

VI   U.S. Virgin Islands 

VN   Vietnam 

VU   Vanuatu 

WF   Wallis And Futuna 

WS   Samoa 

YE   Yemen 

YT   Mayotte 

ZA   South Africa 

ZM   Zambia 

ZW   Zimbabwe 

To check whether a number is prime in java algorithm

/**
 * To check whether a number is prime in java algorithm
 */
package com.belazy.tricks;

import java.math.BigInteger;

/**
 * @author itsection kozhikode
 *
 */
public class Consumerfed {

/**
* @param args
*/
public static void main(String[] args) {
//multiplying by 2
int i = 10;
i= i << 1;
System.out.println(i);

//swapping 2 numbers
int a = 20;
int b = 30;
b^=a;
a^=b;
b^=a;
System.out.println("a="+a +": b="+b);

//counting the digits
double n =10000000;
double N = Math.floor(Math.log10(n )) + 1;
System.out.println("number's count : "+N);

//checking prime number
int p = 17;
System.out.print("checking prime number :");
System.out.println(BigInteger.valueOf(p).isProbablePrime(1));

System.out.println("-- Jerin V George");


}

}

Writing JSON to a file in java

package com.belazy.fileops;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.PrintWriter;

/**
 *
 * @author consumerfed IT
 * itatcalicut@gmail.com
 *
 */
public class WritingToFile {

public static void main(String[] args) {

WritingToFile s = new WritingToFile();

String requestStr = "{Data science is future, learn artificial intelligence}";
s.saveJSONToFile(requestStr, "consumerfed", "itesction", "kozhikode",
"8281808029");
// s.saveJSONToFile2(requestStr, "consumerfed", "itesction", "kozhikode",
// "8281808029");
}

public static void saveJSONToFile(String requestStr, String tripID,
String reqRes, String supplier, String folderName) {
PrintWriter out1 = null;
try(PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter(
f.getPath() + File.separator + tripID, true)));
out1) {
String path1 = "D://beebeesotware";

File f = new File(path1 + File.separator + folderName
+ File.separator + "request");
f.mkdirs();
out1 = new PrintWriter(new BufferedWriter(new FileWriter(
f.getPath() + File.separator + tripID, true)));
out1.println(requestStr);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (null != out1)
out1.close();
}

}

public static void saveJSONToFile2(String requestStr, String tripID,
String reqRes, String supplier, String folderName) {
PrintWriter out1 = null;
try {
String path1 = "D://beebeesotware";

File f = new File(path1 + File.separator + folderName
+ File.separator + "request");
f.mkdirs();
out1 = new PrintWriter(new BufferedWriter(new FileWriter(
f.getPath() + File.separator + tripID, true)));
out1.println(requestStr);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (null != out1)
out1.close();
}

}
}

Serializing POJO to JSON - Input parameterization

How to output a json like below using java program

{"id":"0001","name":"Cake","topping":[{"id":"5001","type":"None"},{"id":"5004","type":"Maple"}],"ppu":"0.55","type":"donut","batters":{"batter":[{"id":"1004","type":"Devil's Food"},{"id":"0001","type":"Regular"}]}}

Program

/**

 * 

 */

package com.belazy.pojostructure;

import com.fasterxml.jackson.core.JsonProcessingException;

import com.fasterxml.jackson.databind.ObjectMapper;

/**

 * @author consumerfed IT Section 

 * Kozhikode

 *

 */

public class ManiClass {

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

Javabelazy user = new Javabelazy();

user.setId("0001");

    user.setType("donut");

    user.setName("Cake");

    user.setPpu("0.55");

    Batter batter1 = new Batter();

    batter1.setId("0001");

    batter1.setType("Regular");

    Batter batter2 = new Batter();

    batter2.setId("1004");

    batter2.setType("Devil's Food");

    Batters batters = new Batters();

    Batter[] batter = new Batter[2];

    batter[1] = batter1;

    batter[0] = batter2;

batters.setBatter(batter );

    user.setBatters(batters); 

    Topping topping1 = new Topping();

    topping1.setId("5001");

    topping1.setType("None");

    Topping topping2 = new Topping();

    topping2.setId("5004");

    topping2.setType("Maple");

    Topping[] topping = new Topping[2];

    topping[0] = topping1;

    topping[1] = topping2;

user.setTopping(topping );

ObjectMapper objectmapper = new ObjectMapper();

    String json = objectmapper.writeValueAsString(user);

    System.out.println(json);

}

}

User class

package com.belazy.pojostructure;

public class Javabelazy

{

    private String id;

    private String name;

    private Topping[] topping;

    private String ppu;

    private String type;

    private Batters batters;

    public String getId ()

    {

        return id;

    }

    public void setId (String id)

    {

        this.id = id;

    }

    public String getName ()

    {

        return name;

    }

    public void setName (String name)

    {

        this.name = name;

    }

    public Topping[] getTopping ()

    {

        return topping;

    }

    public void setTopping (Topping[] topping)

    {

        this.topping = topping;

    }

    public String getPpu ()

    {

        return ppu;

    }

    public void setPpu (String ppu)

    {

        this.ppu = ppu;

    }

    public String getType ()

    {

        return type;

    }

    public void setType (String type)

    {

        this.type = type;

    }

    public Batters getBatters ()

    {

        return batters;

    }

    public void setBatters (Batters batters)

    {

        this.batters = batters;

    }

    @Override

    public String toString()

    {

        return "ClassPojo [id = "+id+", name = "+name+", topping = "+topping+", ppu = "+ppu+", type = "+type+", batters = "+batters+"]";

    }

}

Topping class

package com.belazy.pojostructure;

public class Topping

{

    private String id;

    private String type;

    public String getId ()

    {

        return id;

    }

    public void setId (String id)

    {

        this.id = id;

    }

    public String getType ()

    {

        return type;

    }

    public void setType (String type)

    {

        this.type = type;

    }

    @Override

    public String toString()

    {

        return "ClassPojo [id = "+id+", type = "+type+"]";

    }

}

Batters class

package com.belazy.pojostructure;

public class Batters

{

    private Batter[] batter;

    public Batter[] getBatter ()

    {

        return batter;

    }

    public void setBatter (Batter[] batter)

    {

        this.batter = batter;

    }

    @Override

    public String toString()

    {

        return "ClassPojo [batter = "+batter+"]";

    }

}

Batter class

package com.belazy.pojostructure;

public class Batter

{

    private String id;

    private String type;

    public String getId ()

    {

        return id;

    }

    public void setId (String id)

    {

        this.id = id;

    }

    public String getType ()

    {

        return type;

    }

    public void setType (String type)

    {

        this.type = type;

    }

    @Override

    public String toString()

    {

        return "ClassPojo [id = "+id+", type = "+type+"]";

    }

}

Output

How to use xml x-www-form-urlencoded and logging in okhttp

/**
* Consumerfed IT Section Kozhikode
*/

private String okhttpPost(String xmlRequest) {

String responseStr = null;
HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
logging.setLevel(Level.BASIC);
OkHttpClient client = new OkHttpClient().newBuilder().addInterceptor(logging).connectTimeout(60, TimeUnit.SECONDS).writeTimeout(60, TimeUnit.SECONDS).readTimeout(60, TimeUnit.SECONDS).build();
RequestBody formBody = new FormBody.Builder().add("XML", xmlRequest).build();
Request request = new Request.Builder().url("https://consumerfed/itsection/findData").post(formBody).addHeader("Content-Type", "application/x-www-form-urlencoded")
.addHeader("Connection", "Keep-Alive").addHeader("Accept-Language", "en-US").addHeader("Accept-Encoding", "application/gzip").build();
try {Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
responseStr = response.body().string();}} catch (IOException exception) {
exception.printStackTrace();}
return responseStr;
}

InterruptedIOException

java.io.InterruptedIOException: thread interrupted
at okio.Timeout.throwIfReached(Timeout.java:145)
at okio.Okio$1.write(Okio.java:75


okhttp will check whether current running is interrupted. so check the main thread, why the main thread is interrupted , may be you have to increase the waiting time of that thread