Java String Pro

Parse CSV File using String To kenizer

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.FileWriter;

import java.util.StringTokenizer;

public class ParseCSVFileExample

{

public static void main(String[] args)

{

 try

{

String strFile = "C:/FileIO/example.csv";

BufferedReader br = new BufferedReader( new FileReader(strFile));

String strLine = "";

StringTokenizer st = null;

int lineNumber = 0, tokenNumber = 0;

while( (strLine = br.readLine()) != null)

{

lineNumber++;

st = new StringTokenizer(strLine, ",");

                                

while(st.hasMoreTokens())

{

tokenNumber++;

System.out.println("Line # " + lineNumber + ", Token # " + tokenNumber

+ ", Token : "+ st.nextToken());

}

tokenNumber = 0;

}

}

catch(Exception e)

{

System.out.println("Exception while reading csv file: " + e);                  

   }

  }

}

Read Number from Console and Check if it is a Palindrome Number

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;  

public class InputPalindromeNumberExample

{

public static void main(String[] args)

{

System.out.println("Enter the number to check..");

int number = 0;

try

{      

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

number = Integer.parseInt(br.readLine());

}

catch(NumberFormatException ne)

{

System.out.println("Invalid input: " + ne);

System.exit(0);

}

catch(IOException ioe)

{

System.out.println("I/O Error: " + ioe);

System.exit(0);

}

System.out.println("Number is " + number);

int n = number;

int reversedNumber  = 0;

int temp=0;

while(n > 0){

temp = n % 10;

n = n / 10;

reversedNumber = reversedNumber * 10 + temp;

}

if(number == reversedNumber)

System.out.println(number + " is a palindrome number");

else

System.out.println(number + " is not a palindrome number");

   }

}

Java Input Stream to String

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.util.Scanner;

public class ConvertInputStreamToStringExample

{   

public static void main(String args[]) throws IOException

{

InputStream is = new FileInputStream("c:/data.txt");

String strContent;

BufferedReader bReader = new BufferedReader(new InputStreamReader(is));

StringBuffer sbfFileContents = new StringBuffer();

String line = null;

while( (line = bReader.readLine()) != null)

{

sbfFileContents.append(line);

}

strContent = sbfFileContents.toString();

strContent = new Scanner(is).useDelimiter("\\A").next();

   }

}

Calculate Rectangle Area using Java

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class CalculateRectArea

 {

public static void main(String[] args)

{

int width = 0;

int length = 0;

try

{

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

System.out.println("Please enter length of a rectangle");

length = Integer.parseInt(br.readLine());

System.out.println("Please enter width of a rectangle");

width = Integer.parseInt(br.readLine());

}

catch(NumberFormatException ne)

{

System.out.println("Invalid value" + ne);

System.exit(0);

}

catch(IOException ioe)

{

System.out.println("IO Error :" + ioe);

System.exit(0);

}

int area = length * width;

System.out.println("Area of a rectangle is " + area);

   }

}