CONVERT PROGRAMES

Convert String to long

public class StringToPrimitiveLongExample

{

public static void main(String[] args)

{

String str = new String("10");

long l = Long.parseLong(str);

System.out.println(l);

   }

}

Get Selected Item From Single Select AWT List

import java.applet.Applet;

import java.awt.Graphics;

import java.awt.List;

import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;

public class GetSelectedItemFromSingleSelectExample extends Applet implements ItemListener

{  

List list = null;

public void init()

{

list = new List(5, false);

list.add("One");

list.add("Two");

list.add("Three");

list.add("Four");

list.add("Five");

list.add("Six");

list.add("Seven");

add(list);

list.addItemListener(this);

}

public void paint(Graphics g)

{

g.drawString("Selected Item: "+ list.getSelectedItem(), 10, 120);

}

public void itemStateChanged(ItemEvent arg0)

                    {

repaint();     

  }

}

Performing Binary Search on Java float Array

import java.util.Arrays;

public class BinarySearchFloatArrayExample

{

public static void main(String[] args)

{

float floatArray[] = {1.23f,2.10f,4.74f,5.34f};

Arrays.sort(floatArray);float searchValue = 4.74f;

int intResult = Arrays.binarySearch(floatArray,searchValue);

System.out.println("Result of binary search of 4.74 is : " + intResult);

searchValue = 3.33f;

intResult = Arrays.binarySearch(floatArray,searchValue);

System.out.println("Result of binary search of 3.33 is : " + intResult);

   }

}

Get Synchronized List from Java ArrayList

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class GetSynchronizedListFromArrayListExample

{

public static void main(String[] args)

{

ArrayList arrayList = new ArrayList();

List list = Collections.synchronizedList(arrayList);  

   }

}

Read file using FileInputStream

import java.io.*;

public class ReadStringFromFile

{ 

public static void main(String[] args)

{

File file = new File("C://FileIO//ReadString.txt");

int ch;

StringBuffer strContent = new StringBuffer("");

FileInputStream fin = null;

try 

 { 

 fin = new FileInputStream(file);

while( (ch = fin.read()) != -1)

strContent.append((char)ch);

fin.close();

}

catch(FileNotFoundException e)

{

System.out.println("File " + file.getAbsolutePath() +

" could not be found on filesystem");

}

catch(IOException ioe)

{

System.out.println("Exception while reading the file" + ioe);

}

System.out.println("File contents :");

System.out.println(strContent);

  }

}