Parse XML file using DOM

This code snippet explains about the parsing of the xml file using the DOM parser. import java.io.File; import java.io.IOException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; public class XMLParser { /** * @param args * @throws IOException * @throws SAXException ...

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Listing Files and Directory Using Java

Lists Files and directory present in the system    File dir = new File("directoryName"); String[] children = dir.list(); if (children == null) { // Either dir does not exist or is not a directory } else { for (int i=0; i < children.length; i++) { // Get filename of file or directory String filename = children[i]; } } // It is also possible to filter the list of returned files. // This example does not return any files that start with `.'. FilenameFilter filter = new FilenameFilter()...

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To Capture screen shots using Java

import java.awt.Dimension; import java.awt.Rectangle; import java.awt.Robot; import java.awt.Toolkit; import java.awt.image.BufferedImage; import javax.imageio.ImageIO; import java.io.File; public void captureScreen(String fileName) throws Exception { Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); Rectangle screenRectangle = new Rectangle(screenSize); Robot robot = new Robot(); BufferedImage image = robot.createScreenCapture(screenRectangle); ImageIO.write(image, "png", new File(fileName)); } ...

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Extract a zip file in Java

The sole purpose of this program is how to extarct the content of a zip file in java.We start by opening an input stream to the compressed file and an output stream to the file where we want the content to be extracted. After that we get the next entry of the zip file (and the only entry in this case) - test so it's not null, and then start reading the contents from the input stream and writing each chunk read to the output stream. As usual we should clean up properly afterwards so we close the input and output streams. import java.io.FileInputStream; import...

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Albers Square using JAVA

Albers Square using JAVA public class AlbersSquares { public static void main(String[] args) { StdDraw.setCanvasSize(800, 800); // first color int r1 = Integer.parseInt(args[0]); int g1 = Integer.parseInt(args[1]); int b1 = Integer.parseInt(args[2]); Color c1 = new Color(r1, g1, b1); // second color int r2 = Integer.parseInt(args[3]); int g2 = Integer.parseInt(args[4]); int b2 = Integer.parseInt(args[5]); Color c2 = new Color(r2, g2, b2); ...

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Doubling Stack of Strings using Java

Doubling Stack of Strings using Java   import java.util.Iterator; import java.util.NoSuchElementException; public class DoublingStackOfStrings implements Iterable<String> { private String[] a; private int N; public DoublingStackOfStrings() { a = new String[2]; N = 0; } // is the stack empty? public boolean isEmpty() { return (N == 0); } // resize the underlying array holding the elements private void resize(int capacity) { String[] temp = new String[capacity]; ...

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Excel Comparator xls or xlsx in java

we can compare any two excels of extension either xls or xlsx    import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.Iterator; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.xssf.usermodel.XSSFRow; import...

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Code to Remove Certain Characters from a Java Input

Sometimes we can't rename a file automatically when the Filename has "/" inside them because of Windows limitations. This code might prove handy in these situations. //Code to Remove Certain Characters from a Java Input// try { String Y = X; String regx = "/"; char[] ca = regx.toCharArray(); for (char c : ca) { Y = Y.replace("" + c, ""); }...

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Code to Populate Dropdown from a DB

Using this Java snippet the users can Populate Dropdown from a DB    //Code to Populate Dropdown from a DB// //In JSP// <div id="bodydiv" align="center" > <select name=" Name" onchange="this.form.submit();"> <option name="Router Name" value="0">--------select--------</option> <% GetXRouter dao = new GetXRouter(); ArrayList ReList = dao.retreiveRname(); for (int i = 0; i < ReList.size(); i++) { %> <option name="RName" value="<%=ReList.get(i)%>"><%=ReList.get(i)%></option> ...

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