Percentage calculation Example in Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public final class Percent {

public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("enter the total no.of sub");
int n = Integer.parseInt(br.readLine());
int marks[] = new int[n];
int i, tot = 0;
for (i = 0; i < n; i++) {
System.out.println("enter ur marks");
marks[i] = Integer.parseInt(br.readLine());
tot = tot + marks[i];
}
System.out.println("total marks: " + tot);
System.out.println("percentage of marks: " + (float) tot / n);
}
}

Create Excel File in Java using POI API

import java.io.FileOutputStream;

import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class CreateExcelFile {
public static final String FILE_NAME = "D:\\test.xls";

public void createExcelFile(String filename) {
try {
HSSFWorkbook hwb = new HSSFWorkbook();
HSSFSheet sheet = hwb.createSheet("Sheet1");

HSSFRow rowhead = sheet.createRow((short) 0);
rowhead.createCell((short) 0).setCellValue("S.No.");
rowhead.createCell((short) 1).setCellValue("Emp ID");
rowhead.createCell((short) 2).setCellValue("EMP Name");
rowhead.createCell((short) 3).setCellValue("Dept");

rowhead = sheet.createRow((short) 1);
rowhead.createCell((short) 0).setCellValue("1");
rowhead.createCell((short) 1).setCellValue("EMP1");
rowhead.createCell((short) 2).setCellValue("Mallik");
rowhead.createCell((short) 3).setCellValue("Java");

FileOutputStream fileOut = new FileOutputStream(filename);
hwb.write(fileOut);
fileOut.close();
System.out.println("Your excel file has been generated!");

} catch (Exception ex) {
System.out.println(ex);
ex.printStackTrace();
}
}
public static void main(String[] args) {
CreateExcelFile excelFile = new CreateExcelFile();
excelFile.createExcelFile(FILE_NAME);
}
}

Get Answers for mathematical equations from Google Search

Every one know that Google is always coming up with the new inventions and trying to make the Google as life to the user in future. Below is one of the new invention from the Google.


Google has just released a new 34-button scientific calculator in the Google serch options. Go ahead and enter an equation into Google Search. Try 2+2. Now, instead of simply coming up with the answer, Google presents you with a full, 34-button scientific calculator. You can also find the answers for Trigonometric functions and 'Pi' functions


You can also access the calculator with Desktop Voice Search. Just click the little microphone icon in the search bar, speak your equation out loud and wait a split second for your answer. A pared-down version of the calculator also appears during mobile searches.

Today I have tested the calculator with the mathematical equations, triganometric functions and others..., it is amazing for me.

So, why to wait? start searching mathematical equations or mathematical functions in google.... Hope you will enjoy

Are you waiting for Windows 8 to use?

If you are eagerly waiting for new versions of windows with more features, this is the time to know about the windows 8. Every one knows that Microsoft gave a wonderful OS with Windows 7, but still people want more comfort level in using the Computers than earlier. 

Microsoft has released a new version of Windows called Windows 8 with excellent features and functionalities. You can upgrade to new version of Windows  or you can also purchase as a DVD copy from the stores and pricing will be different for different cases.

Most of the information you can find @ http://www.techgig.com/tech-news/editors-pick/How-can-you-get-Windows-8--13912

Convert charr array to String in Java

1. We can convert char array to String by passing the array to String constructor.

public void convertCharArrayToStringOption1() {

    char[] charArray = new char[] { 'a', 'b', 'c', 'd' };

    System.out.println("The new String Array is : "+new String(charArray));

}

2. We can also pass the char array to 'valueOf()' static method of String class:

public void convertCharArrayToStringOption1() {

    char[] charArray = new char[] { 'a', 'b', 'c', 'd' };

    System.out.println("The new String Array is : "+
String.valueOf(charArray));

}

Funtab Fit tablet launched at Rs 5,999

Delhi-based Go Tech has launched a health-oriented tablet called Funtab Fit at a price of Rs 5,999. This device comes with a host of pre-installed health-related apps, along with access for 1,500 books and 7,500 videos for students. 

On the specifications front, Funtab Fit has a 7-inch display panel with 800x480 resolution, 1GHz processor, 512MB RAM, 32GB expandable memory, VGA camera and runs onAndroid v4.0.3 (Ice Cream Sandwich). The tablet with a 5-point capacitive touchscreen supports 1080p video playback and various audio and video formats. 

It ensures continuous internet connectivity through Wi-Fi and 3G (via USB dongle). The tablet features USB-on-the-go support and can be used to read Word, Excel, PowerPoint, PDF and TXT files. Other notable features of Funtab Fit include multiple language support, 3D games and video output via HDMI cable. The tablet with a 3600mAh battery claims 8-hour battery life.

Marker or Tag interface in java

An interface is called a marker interface when it is provided as a handle by java interpreter to mark a class so that it can provide special behaviour to it at runtime and they do not have any method declarations.

Java Marker Interface Examples

• java.lang.Cloneable
• java.io.Serializable
• java.util.EventListener
• 
  

Why we need Marker Interface?

Suppose you want to persist (save) the state of an object then you have to implement the Serializable interface otherwise the compiler will throw an error. To make more clearly understand the concept of marker interface you should go through one more example.

Suppose the interface Clonable is neither implemented by a class named Myclass nor it’s any super class, then a call to the method clone() on Myclass’s object will give an error. This means, to add this functionality one should implement the Clonable interface. While the Clonable is an empty interface but it provides an important functionality.

We cannot create marker interfaces, as you cannot instruct JVM to add special behavior to all classes implementing (directly) that special interface.

From java 1.5, the need for marker interface is eliminated by the introduction of the java annotation feature. So, it is wise to use java annotations than the marker interface. It has more feature and advantages than the java marker interface.

Do you know about Privite Browsing in Internet Exporer?

You can do more secured browsing using your Internet Explorer in Private Browsing mode shown below:

Here are answers to some common questions about InPrivate. Taken from IE Help menu...

 What is InPrivate Browsing?

InPrivate Browsing prevents Internet Explorer from storing data about your browsing session. This helps prevent anyone else who might be using your computer from seeing where you visited and what you looked at on the web. When you start InPrivate Browsing, Internet Explorer opens a new window. The protection that InPrivate Browsing provides is only in effect during the time that you use that window. You can open as many tabs as you want in that window, and they will all be protected by InPrivate Browsing. However, if you open another browser window, that window will not be protected by InPrivate Browsing. To end your InPrivate Browsing session, close the browser window. 

 How do I turn on InPrivate Browsing?

To turn on InPrivate Browsing, do any of the following:

• Click the Safety button, and then click InPrivate Browsing.
• Open a new tab, and then, on the new tab page, click Open an InPrivate Browsing window.
• Press Ctrl+Shift+P.

 What is InPrivate Filtering?

InPrivate Filtering helps prevent website content providers from collecting information about sites you visit. Here's how it works.

Many webpages use content—such as advertisements, maps, or web analysis tools—from websites other than the one you are visiting. These websites are called content providers or third-party websites. When you visit a website with third-party content, some information about you is sent to the content provider. If a content provider offers content to a large number of the websites you visit, the content provider could develop a profile of your browsing preferences. Profiles of browsing preferences can be used in a variety of ways, including for analysis and serving targeted advertisements.

Usually this third-party content is displayed seamlessly, such as in an embedded video or image. The content appears to originate from the website you originally went to, so you may not know that another website might be able to see where you are surfing. Web analysis or web measurement tools report website visitors' browsing habits, and are not always obvious to you. While these tools can sometimes appear as visible content (such as a visitor counter, for example), they are often not visible to users, as is often the case with web beacons. Web beacons are typically single-pixel transparent images whose sole purpose is to track website usage, and they do not appear as visible content.

InPrivate Filtering works by analyzing web content on the webpages you visit, and if it sees the same content being used on a number of websites, it will give you the option to allow or block that content. You can also choose to have InPrivate Filtering automatically block any content provider or third-party website it detects, or you can choose to turn off InPrivate Filtering.

 How do I turn InPrivate Filtering on and off?

By default, InPrivate Filtering analyzes the websites you visit and the content providers they use, but does not automatically block them. You can choose to allow or block any content provider that InPrivate Filtering identifies as receiving information about your browsing. Alternatively, you can have InPrivate Filtering automatically block any content provider, or you can turn off InPrivate Filtering.

To turn on InPrivate Filtering for the first time, follow these steps:

1. Open Internet Explorer.
2. Click the Safety button, click InPrivate Filtering, and then do one of the following:
   • Click Block for me to block websites automatically.
   • Click Let me choose which providers receive my information to choose content to block or allow. When you're finished, click OK.

If you've already turned on InPrivate Filtering, follow these steps:

1. Open Internet Explorer.
2. Click the Safety button, and then click InPrivate Filtering Settings.
3. Do one of the following:
   • To automatically block websites, click Automatically block.
   • To manually block websites, click Choose content to block or allow.
   • To turn off InPrivate Filtering, click Off.
4. Click OK.

 How do I manually choose content to block or allow?

To manually block or allow content provider or third-party websites that could be in the position to know which websites you've visited, follow these steps:

1. Open Internet Explorer.
2. Click the Safety button, and then click InPrivate Filtering Settings.
3. Click Choose content to block or allow, click one or more websites, and then click Allow or Block.
4. To set the number of websites you visit that share content before they are put in the list, type a new number in the Show content from providers used by this number of websites you’ve visited box. You can set the number from 3 to 30.
   The default setting is 10, which means at least 10 different websites must share the same content provider before it is displayed and you can block or allow it.
5. When you're finished, click OK.

Have you heard about Google Drive?

Mid of this week Google has introduced Google Drive—a place where you can create, share, collaborate, and keep all of your stuff. Whether you’re working with a friend on a joint research project, planning a wedding with your fiancé or tracking a budget with roommates, you can do it in Drive. You can upload and access all of your files, including videos, photos, Google Docs, PDFs and beyond. 


With Google Drive, you can:

• Create and collaborate. Google Docs is built right into Google Drive, so you can work with others in real time on documents, spreadsheets and presentations. Once you choose to share content with others, you can add and reply to comments on anything (PDF, image, video file, etc.) and receive notifications when other people comment on shared items.
• Store everything safely and access it anywhere (especially while on the go). All your stuff is just... there. You can access your stuff from anywhere—on the web, in your home, at the office, while running errands and from all of your devices. You can install Drive on your Mac or PC and can download the Drive app to your Android phone or tablet. We’re also working hard on a Drive app for your iOS devices. And regardless of platform, blind users can access Drive with a screen reader.
• Search everything. Search by keyword and filter by file type, owner and more. Drive can even recognize text in scanned documents using Optical Character Recognition (OCR) technology. Let’s say you upload a scanned image of an old newspaper clipping. You can search for a word from the text of the actual article. We also use image recognition so that if you drag and drop photos from your Grand Canyon trip into Drive, you can later search for [grand canyon] and photos of its gorges should pop up. This technology is still in its early stages, and we expect it to get better over time.

You can get started with 5GB of storage for free—that’s enough to store the high-res photos of your trip to the Mt. Everest, scanned copies of your grandparents’ love letters or a career’s worth of business proposals, and still have space for the novel you’re working on. You can choose to upgrade to 25GB for $2.49/month, 100GB for $4.99/month or even 1TB for $49.99/month. When you upgrade to a paid account, your Gmail account storage will also expand to 25GB.


Drive is built to work seamlessly with your overall Google experience. You can attach photos from Drive to posts in Google+, and soon you’ll be able to attach stuff from Drive directly to emails in Gmail. Drive is also an open platform, so we’re working with many third-party developers so you can do things like send faxes, edit videos andcreate website mockups directly from Drive. To install these apps, visit the Chrome Web Store—and look out for even more useful apps in the future.


Taken from : http://googleblog.blogspot.in/2012/04/introducing-google-drive-yes-really.html


For More info about Google Drive: https://drive.google.com/start?authuser=0#features

Java Programming Language Version 7 Features

• Binary Literals - In Java SE 7, the integral types (byte, short, int, and long) can also be expressed using the binary number system. To specify a binary literal, add the prefix0b or 0B to the number.
• Underscores in Numeric Literals - Any number of underscore characters (_) can appear anywhere between digits in a numerical literal. This feature enables you, for example, to separate groups of digits in numeric literals, which can improve the readability of your code.
• Strings in switch Statements - You can use the String class in the expression of a switch statement.
• Type Inference for Generic Instance Creation - You can replace the type arguments required to invoke the constructor of a generic class with an empty set of type parameters (<>) as long as the compiler can infer the type arguments from the context. This pair of angle brackets is informally called the diamond.
• Improved Compiler Warnings and Errors When Using Non-Reifiable Formal Parameters with Varargs Methods - The Java SE 7 complier generates a warning at the declaration site of a varargs method or constructor with a non-reifiable varargs formal parameter. Java SE 7 introduces the compiler option -Xlint:varargs and the annotations@SafeVarargs and @SuppressWarnings({"unchecked", "varargs"}) to supress these warnings.
• The try-with-resources Statement - The try-with-resources statement is a try statement that declares one or more resources. A resource is an object that must be closed after the program is finished with it. The try-with-resources statement ensures that each resource is closed at the end of the statement. Any object that implements the newjava.lang.AutoCloseable interface or the java.io.Closeable interface can be used as a resource. The classes java.io.InputStream, OutputStream, Reader,Writer, java.sql.Connection, Statement, and ResultSet have been retrofitted to implement the AutoCloseable interface and can all be used as resources in a try-with-resources statement.
• Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking - A single catch block can handle more than one type of exception. In addition, the compiler performs more precise analysis of rethrown exceptions than earlier releases of Java SE. This enables you to specify more specific exception types in the throwsclause of a method declaration.