How to convert number to word in java, Number to Word

Just use String().subString() method and you can develop java code to convert number to word. Like 12345678 to
one Crore twenty three Lakh forty five thousand six hundred seventy eight.

import java.text.DecimalFormat;

public class NumberToWord {
public static void main(String[] args) {
System.out.println(convert(12345678));
}
private static final String[] tensNames = { "", " ten", " twenty", " thirty", " forty", " fifty", " sixty", " seventy", " eighty", " ninety" };

private static final String[] numNames = { "", " one", " two", " three", " four", " five", " six", " seven", " eight", " nine", " ten", " eleven", " twelve", " thirteen", " fourteen", " fifteen", " sixteen", " seventeen", " eighteen", " nineteen" };

private static String convertLessThanOneThousand(int number) {
String soFar;
if (number % 100 < 20){ soFar = numNames[number % 100]; number /= 100; } else { soFar = numNames[number % 10]; number /= 10;
soFar = tensNames[number % 10] + soFar; number /= 10; } if (number == 0) return soFar; return numNames[number] + " hundred" + soFar; }
public static String convert(long number) {
// 0 to 999 999 999 999
if (number == 0) { return "zero"; }
String snumber = Long.toString(number);
// pad with "0"
String mask = "000000000000"; DecimalFormat df = new DecimalFormat(mask); snumber = df.format(number);
int hyndredCrore = Integer.parseInt(snumber.substring(3,5));
int hundredLakh = Integer.parseInt(snumber.substring(5,7));
int hundredThousands = Integer.parseInt(snumber.substring(7,9));
int thousands = Integer.parseInt(snumber.substring(9,12));
String tradBillions;
switch (hyndredCrore) { case 0: tradBillions = ""; break; case 1 : tradBillions = convertLessThanOneThousand(hyndredCrore) + " Crore "; break; default : tradBillions = convertLessThanOneThousand(hyndredCrore) + " Crore "; }

String result = tradBillions;
String tradMillions;
switch (hundredLakh) { case 0: tradMillions = ""; break; case 1 : tradMillions = convertLessThanOneThousand(hundredLakh) + " Lakh "; break; default : tradMillions = convertLessThanOneThousand(hundredLakh) + " Lakh "; }
result = result + tradMillions;
String tradHundredThousands;

switch (hundredThousands) { case 0: tradHundredThousands = ""; break; case 1 : tradHundredThousands = "one thousand "; break; default : tradHundredThousands = convertLessThanOneThousand(hundredThousands) + " thousand "; }
result = result + tradHundredThousands;

String tradThousand;
tradThousand = convertLessThanOneThousand(thousands);
result = result + tradThousand;return result.replaceAll("^\\s+", "").replaceAll("file://b//s%7B2,%7D//b", " "); }
}

How to delete recursively empty folder using java, Recursively Delete Empty Folders

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class DeleteEmptyFolder {
public static void main(String[] args) throws IOException {
deleteEmptyFolders("C:\\temp");
}

public static void deleteEmptyFolders(String folderName) throws FileNotFoundException {
File aStartingDir = new File(folderName);
List<File> emptyFolders = new ArrayList<File>();
findEmptyFoldersInDir(aStartingDir, emptyFolders);
List<String> fileNames = new ArrayList<String>();
for (File f : emptyFolders) {
String s = f.getAbsolutePath(); fileNames.add(s);
}
for (File f : emptyFolders) {
boolean isDeleted = f.delete();
if (isDeleted) {
System.out.println(f.getPath() + " deleted");
}
}
}

public static boolean findEmptyFoldersInDir(File folder, List<File> emptyFolders) {
boolean isEmpty = false;
File[] filesAndDirs = folder.listFiles();
List<File> filesDirs = Arrays.asList(filesAndDirs);
if (filesDirs.size() == 0) { isEmpty = true; }
if (filesDirs.size() > 0) {
boolean allDirsEmpty = true;
boolean noFiles = true;
for (File file : filesDirs) {
if (!file.isFile()) {
boolean isEmptyChild = findEmptyFoldersInDir(file, emptyFolders);
if (!isEmptyChild) { allDirsEmpty = false; }
}
if (file.isFile()) { noFiles = false; }
}
if (noFiles == true && allDirsEmpty == true) { isEmpty = true; }
} if (isEmpty) { emptyFolders.add(folder); }
return isEmpty;
}
}

How to get recursively listing all files in directory using Java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class AllFilesInFolder {
public static void main(String[] args) throws FileNotFoundException {
String folderName = "C:\\temp";
List<String> fileNames = getAllFiles(folderName);
System.out.println("All Files :: " + fileNames);
}

public static List<String> getAllFiles(String folderName) throws FileNotFoundException {
File aStartingDir = new File(folderName);
List<File> result = getFileListingNoSort(aStartingDir);
List<String> fileNames = new ArrayList<String>();
for (File f : result) {
String s = f.getAbsolutePath();
fileNames.add(s);
}

Collections.sort(result);
Collections.sort(fileNames);
return fileNames;
}

public static List<File> getFileListingNoSort(File aStartingDir) throws FileNotFoundException {
List<File> result = new ArrayList<File>();
File[] filesAndDirs = aStartingDir.listFiles();
List<File> filesDirs = Arrays.asList(filesAndDirs);
for (File file : filesDirs) {
if (!file.isDirectory()) result.add(file);
if (!file.isFile()) {
List<File> deeperList = getFileListingNoSort(file);
result.addAll(deeperList);
}
}
return result;
}
}

how to unzip file in java; Java Unzip file,

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class MakeUnZip {
public static void main(String argv[]) {
String zipFileName = "src\\myZip.zip";
unZip(zipFileName);
}

public static void unZip(String zipFileName) {
int BUFFER = 2048;
try {
BufferedOutputStream dest = null;
FileInputStream fileInputStream = new FileInputStream(zipFileName);
ZipInputStream zipInputStream = new ZipInputStream(new BufferedInputStream(fileInputStream));
ZipEntry zipEntry;
int count=0;
while ((zipEntry = zipInputStream.getNextEntry()) != null) {
System.out.println("Extracting File Name :: " + zipEntry);
count++; int length;
byte data[] = new byte[BUFFER];
FileOutputStream fileOutputStream = new FileOutputStream(zipEntry.getName());
dest = new BufferedOutputStream(fileOutputStream, BUFFER);
while ((length = zipInputStream.read(data, 0, BUFFER)) != -1) {
dest.write(data, 0, length);
}

dest.flush();
dest.close();
}

zipInputStream.close();
System.out.println("Total "+count+ " Files Unziped Successfully ");
} catch (Exception e) { e.printStackTrace(); }
}
}

Get contents of a ZIP file in Java, how to get file names in zip file in java

import java.io.File;
import java.io.IOException;
import java.util.Enumeration;
import java.util.zip.ZipFile;

public class ZipContents {
public static void main(String[] args) {
File zipFileName = new File("src\\myZip.zip");
getContentsInZip(zipFileName);
}

public static void getContentsInZip(File zipFileName){
try{ ZipFile zipFile = new ZipFile(zipFileName);
Enumeration em = zipFile.entries();
for (Enumeration enumer = zipFile.entries(); enumer.hasMoreElements();) {
System.out.println(enumer.nextElement());
}
}catch(IOException e){ e.printStackTrace(); }
}
}

How to make Zip file using Java, Creating a ZIP file in Java

To run this tutorial
1. Create one folder src
2. Put test1.txt and test2.txt in src folder.
3. After run this code, you will get myZip.zip file in src folder.

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class MakeZip {
public static void main(String[] args) {
String[] filesToZip = {"src\\test1.txt","src\\test2.txt"};
//String[] filesToZip = {"src\\test1.txt"};
String ZipedFileName = "src\\myZip.zip";
zipConversion(filesToZip, ZipedFileName);
}

public static void zipConversion(String[] files, String ZipedFileName){
byte[] buffer = new byte[1024];
try{
FileOutputStream outputFile = new FileOutputStream(ZipedFileName);
ZipOutputStream zipFile = new ZipOutputStream(outputFile);
for(int i=0;i<files.length;i++){
FileInputStream inFile = new FileInputStream(files[i]);
zipFile.putNextEntry(new ZipEntry(files[i]));
int length;
while ((length = inFile.read(buffer)) > 0) {
zipFile.write(buffer, 0, length); }

zipFile.closeEntry();
inFile.close();
}

zipFile.close();
System.out.println("Files Ziped Successfully");
}catch(IOException e){ e.printStackTrace(); }
}
}

You can either give one file to zip or any number of files in fileToZip string array.

AJAX Program for Firefox, Ajax does not work with Firefox, Ajax not working in firefox but works with IE, Ajax for Mozilla

There are many questions are floating on internet that AJAX code doesnot work for Mozilla FireFox. And interesting there is no such exact solution for this. Some days back I have also posted one article on my blog regarding one simple tutorial on Ajax and it was very fine with IE. One day I got one comment that my tutorial is not working for Firefox. I asked this question to one of my friend and she gave the solution. Thanks MP.

Complete Example:

[Please follow my prior posting to setup this tutorial]

1. ShowStudentInfo.jsp (C:\Ajax_workspace\blog_demo\WebContent\ShowStudentInfo.jsp)
2. StudentInfo.java (C:\Ajax_workspace\blog_demo\src\StudentInfo.java) This is a servlet.

ShowStudentInfo.jsp

<html>
<head>
<title>Binod Java Solution AJAX</title>
<script type="text/javascript">
var request; function getName(){
var roll = document.getElementById("roll").value;
var url = "http://localhost:8080/blog_demo/StudentInfo?roll="+roll;

if(window.ActiveXObject){
request = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest){
request = new XMLHttpRequest();
}

request.onreadystatechange = showResult;
request.open("POST",url,true);
request.send(null);
}
function showResult(){
if(request.readyState == 4){
if ( request.status == 200 ) {
var response = request.responseXML;
var students = response.getElementsByTagName("Student");
var student = students[0];

document.getElementById("NamelH1").innerHTML = student.getElementsByTagName("Name")[0].childNodes[0].data;
document.getElementById("HostelH1").innerHTML = student.getElementsByTagName("Hostel")[0].childNodes[0].data;
document.getElementById("ContactH1").innerHTML = student.getElementsByTagName("Contact")[0].childNodes[0].data;


}
}
}
</script>
</head>
<body>
<h2>GET STUDENT INFO</h2>
<br>
Enter Roll Number
<input type="text" id="roll">
<input type="button" value="Get Name" onclick="getName();" />
<br>
Name :
<span id="NamelH1"></span>
<br>
Hostel :
<span id="HostelH1"></span>
<br>
Contact :
<span id="ContactH1"></span>
<br>
</body>
</html>



StudentInfo.java

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class StudentInfo extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
static final long serialVersionUID = 1L;
public StudentInfo() { super(); }
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request,response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String roll = request.getParameter("roll");
PrintWriter out = response.getWriter();
response.setContentType("text/xml");
System.out.println(getResult(roll)); out.println(getResult(roll));
}
public String getResult(String roll){
String name = "";
String hostel = "";
String contact = "";
if(roll.equalsIgnoreCase("110")){
name = "Binod Kumar Suman"; hostel = "Ganga"; contact = "999999999";
} else if(roll.equalsIgnoreCase("120")){
name = "Pramod Kumar Modi"; hostel = "Godawari"; contact = "111111111111";
} else{ name = "Roll Number not found"; }
String result = "<Students>";
result += "<Student>"; result += "<Name>" + name + "</Name>";
result += "<Hostel>" +hostel + "</Hostel>";
result += "<Contact>" +contact + "</Contact>";
result += "</Student>"; result += "</Students>";
return result;
}
}

This code also work well with IE.