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How to Create Whole Path Automatically and write into File In Java

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        File file = new File("/home/anand/Desktop/filename.html");         file.getParentFile().mkdirs();         FileWriter writer = new FileWriter(file);                 bw = new BufferedWriter(writer);         PrintWriter  out = new PrintWriter(bw);         out.println("<h4>Welcome in Bangalore</h4>");         out.close();
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How Session Managment Works in servlet/jsp

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/*  * To change this license header, choose License Headers in Project Properties.  * To change this template file, choose Tools | Templates  * and open the template in the editor.  */ import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import java.sql.*; /**  *  * @author pandey  */ public class Registration extends HttpServlet {     @Override     protected void doGet(HttpServletRequest request, HttpServletResponse response)             throws ServletException, IOException {         PrintWriter out = response.getWriter();         HttpSession hs = request.getSession();         /*================== Get First Form Data  =======================*/         String id = request.getParameter("fno");         if (id.equals("1")) {             String name = request.
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Java Experiance InterView Questions and answer

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--> Example of SingleTone in java  public final class SingleTone {         /**      * @author anand      *      */             public static SingleTone single;     //Can be act as SingleTone or make constructor as private         private SingleTone(){}         public static synchronized SingleTone getInstance(){                 if(single==null){                         single=new SingleTone();         }         return single;     }     } --> What is difference between StringBuffer and StringBuilder in Java ? # Stringbuffer methods are synchronized while StringBuilder is non synchronized. See StringBuilder vs StringBuffer for more differences.  # StringBuffer as slow in performance since Thread Safe whereas StringBuilder in faster .
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Scheduler JOB in java

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package com..scheduler; import static org.quartz.CronScheduleBuilder.dailyAtHourAndMinute; import java.util.Calendar; import org.quartz.Job; import org.quartz.JobBuilder; import org.quartz.JobDetail; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; import org.quartz.Scheduler; import org.quartz.SchedulerException; import org.quartz.Trigger; import org.quartz.TriggerBuilder; import org.quartz.impl.StdSchedulerFactory; public class SchedulerTest implements Job {     public static void main(String[] args) {         int HOUR_OF_DAY = Integer.parseInt("20");         int MINUTE_OF_HOUR = Integer.parseInt("10");         Trigger trigger1 = TriggerBuilder.newTrigger().withIdentity("test trigger1", "group1").withSchedule(dailyAtHourAndMinute(08, 00)).build();         Trigger trigger2 = TriggerBuilder.newTrigger().withIdentity("test trigger2", "group1").withSchedule(dailyAtHourAndMinute(20, 01)).build();  
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How to write Scheduler in Java

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import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /**  * This Class is Used to Run Every after 15 min  *  * @author ananddw  **/ public class TestScheduler{     public static void main(String[] args) {         new TestScheduler().start();     }     public void start() {         System.out.println(" scheduler starts");         Executors.newSingleThreadScheduledExecutor().scheduleWithFixedDelay(new Runnable() {             @Override             public void run() {                 try {                     //Need to Call Your Method which will execute every after 15 min                     System.out.println(new java.util.Date());                 } catch (Throwable e) {                     System.out.println("--Error in  Schduler--");                     e.printStackTrace();                 }             }         }, 0, 15, TimeUnit.MINUTES);     } }
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how to get src value from normal Text in javascript

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<html> <head> </head> <title>|| Video Uploader || </title> <body> <input type="text" id="video_url" name="video_url" value="<iframe   width='420' height='315'    src='https://www.youtube.com/embed/XGSy3_Czz8k'></iframe>"  /> <button id = "opener" onclick="insertURL()">Show URL </button> <script type="text/javascript"> <!-- If User's Provide direct URL or Full iframe innerhtml-->     function insertURL(){         var ishare_url = document.getElementById("video_url").value;                 if(undefined!==ishare_url.split('src=')[1]){         var src = ishare_url.split('src=')[1].split(/[ >]/)[0];         if(src){             var decode_ishare_url = decodeURI(src.trim());             var replace_String = decode_ishare_url.replace(/%22/g, '');             var re
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How to Add Javascript,CSS inside Javascript

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<!DOCTYPE html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> <script> var CSSURL="https://fonts.googleapis.com/css?family=Hind"; $(document).ready(function(){     $("p").click(function(){        alert("Hi");   $.getScript("https://code.jquery.com/ui/1.12.1/jquery-ui.js", function(){    alert("Script loaded but not necessarily executed."); });     }); }); var linkElem = document.createElement('link'); document.getElementsByTagName('head')[0].appendChild(linkElem); linkElem.rel = 'stylesheet'; linkElem.type = 'text/css'; linkElem.href = CSSURL; </script> </head> <body> <p>Click Here to load JS and CSS As well !</p> </body> </html>
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How to Read XLSX File in Java Using apache Poi API

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Here we will implement the code to read XLSX file using apache POI API : and download required jars based on below snapshot Code : - /*  * To change this license header, choose License Headers in Project Properties.  * To change this template file, choose Tools | Templates  * and open the template in the editor.  */ package com.test.XLS; import java.io.*; import java.util.*; import org.apache.poi.ss.usermodel.*; import org.apache.poi.xssf.usermodel.*; /**  *  * @author anand  */ public class XLSReader {     static final String fileName = "FriendsZone.xlsx";     FileInputStream file = null;     public void readXLSFile() {         try {             file = new FileInputStream(new File(fileName));             XSSFWorkbook workbook = new XSSFWorkbook(file);             XSSFSheet sheet = workbook.getSheetAt(0);             Iterator<Row> rowIterator = sheet.iterator();             while (rowIterator.hasNext()) {                 Ro
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