Swap Numbers Without Using Third Variable Java Example

/*
 Swap Numbers Without Using Third Variable Java Example
 This Swap Numbers Java Example shows how to 
 swap value of two numbers without using third variable using java.
*/
 
public class SwapElementsWithoutThirdVariableExample {
 
 public static void main(String[] args) {
 
  int num1 = 10;
  int num2 = 20;
 
  System.out.println("Before Swapping");
  System.out.println("Value of num1 is :" + num1);
  System.out.println("Value of num2 is :" +num2);
 
  //add both the numbers and assign it to first
  num1 = num1 + num2;
  num2 = num1 - num2;
  num1 = num1 - num2;
 
  System.out.println("Before Swapping");
  System.out.println("Value of num1 is :" + num1);
  System.out.println("Value of num2 is :" +num2);
 }
 
 
}
 
/*
Output of Swap Numbers Without Using Third Variable example would be
Before Swapping
Value of num1 is :10
Value of num2 is :20
Before Swapping
Value of num1 is :20
Value of num2 is :10
*/

Swap Numbers Without Using Third Variable Java Example

/*
 Swap Numbers Without Using Third Variable Java Example
 This Swap Numbers Java Example shows how to 
 swap value of two numbers without using third variable using java.
*/

public class SwapElementsWithoutThirdVariableExample {

public static void main(String[] args) {

int num1 = 10;
int num2 = 20;

System.out.println("Before Swapping");
System.out.println("Value of num1 is :" + num1);
System.out.println("Value of num2 is :" +num2);

//add both the numbers and assign it to first
num1 = num1 + num2;
num2 = num1 - num2;
num1 = num1 - num2;

System.out.println("Before Swapping");
System.out.println("Value of num1 is :" + num1);
System.out.println("Value of num2 is :" +num2);
}


}

/*
Output of Swap Numbers Without Using Third Variable example would be
Before Swapping
Value of num1 is :10
Value of num2 is :20
Before Swapping
Value of num1 is :20
Value of num2 is :10
*/

Reverse Number using Java

/*
  Reverse Number using Java
  This Java Reverse Number Example shows how to reverse a given number.
*/
 
public class ReverseNumber {
 
 public static void main(String[] args) {
 
  //original number
  int number = 1234;
  int reversedNumber = 0;
  int temp = 0;
 
  while(number > 0){
 
   //use modulus operator to strip off the last digit
   temp = number%10;
 
   //create the reversed number
   reversedNumber = reversedNumber * 10 + temp;
   number = number/10;
 
  }
 
  //output the reversed number
  System.out.println("Reversed Number is: " + reversedNumber);
 }
}
 
/*
Output of this Number Reverse program would be
Reversed Number is: 4321
*/

Java Factorial Using Recursion Example

Submitted By: Mohit Garg

/*
 Java Factorial Using Recursion Example
 This Java example shows how to generate factorial of a given number
 using recursive function.
*/
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
public class JavaFactorialUsingRecursion {
 
 public static void main(String args[]) throws NumberFormatException, IOException{
 
  System.out.println("Enter the number: ");
 
  //get input from the user
  BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
  int a = Integer.parseInt(br.readLine());
 
  //call the recursive function to generate factorial
  int result= fact(a);
 
 
  System.out.println("Factorial of the number is: " + result);
 }
 
 static int fact(int b)
 {
  if(b <= 1)
   //if the number is 1 then return 1
   return 1;
  else
   //else call the same function with the value - 1
   return b * fact(b-1);
 }
}
 
/*
Output of this Java example would be
 
Enter the number: 
5
Factorial of the number is: 120
*/

Java Interface example

/*
Java Interface example.
This Java Interface example describes how interface is defined and 
being used in Java language.
 
Syntax of defining java interface is,
<modifier> interface <interface-name>{
  //members and methods()
}
*/
 
//declare an interface
interface IntExample{
 
  /*
  Syntax to declare method in java interface is,
  <modifier> <return-type> methodName(<optional-parameters>);
  IMPORTANT : Methods declared in the interface are implicitly public and abstract.
  */
 
  public void sayHello();
  }
}
/*
Classes are extended while interfaces are implemented.
To implement an interface use implements keyword.
IMPORTANT : A class can extend only one other class, while it 
can implement n number of interfaces.
*/
 
public class JavaInterfaceExample implements IntExample{
  /*
  We have to define the method declared in implemented interface,
  or else we have to declare the implementing class as abstract class.
  */
 
  public void sayHello(){
    System.out.println("Hello Visitor !");
  }
 
  public static void main(String args[]){
    //create object of the class
    JavaInterfaceExample javaInterfaceExample = new JavaInterfaceExample();
    //invoke sayHello(), declared in IntExample interface.
    javaInterfaceExample.sayHello();
  }
}
 
/*
OUTPUT of the above given Java Interface example would be :
Hello Visitor !
*/

Find Largest and Smallest Number in an Array Example

/*
  Find Largest and Smallest Number in an Array Example
  This Java Example shows how to find largest and smallest number in an 
  array.
*/
public class FindLargestSmallestNumber {
 
 public static void main(String[] args) {
 
  //array of 10 numbers
  int numbers[] = new int[]{32,43,53,54,32,65,63,98,43,23};
 
  //assign first element of an array to largest and smallest
  int smallest = numbers[0];
  int largetst = numbers[0];
 
  for(int i=1; i< numbers.length; i++)
  {
   if(numbers[i] > largetst)
    largetst = numbers[i];
   else if (numbers[i] < smallest)
    smallest = numbers[i];
 
  }
 
  System.out.println("Largest Number is : " + largetst);
  System.out.println("Smallest Number is : " + smallest);
 }
}
 
/*
Output of this program would be
Largest Number is : 98
Smallest Number is : 23
*/

Create New Thread Using Runnable Example

/*
 Create New Thread Using Runnable Example
 This Java example shows how to create a new thread by implementing
 Java Runnable interface.
*/
 
/*
 * To create a thread using Runnable, a class must implement
 * Java Runnable interface.
 */
public class CreateThreadRunnableExample implements Runnable{
 
 /*
  * A class must implement run method to implement Runnable 
  * interface. Signature of the run method is,
  * 
  * public void run()
  * 
  * Code written inside run method will constite a new thread.
  * New thread will end when run method returns.
  */
 public void run(){
 
  for(int i=0; i < 5; i++){
   System.out.println("Child Thread : " + i);
 
   try{
    Thread.sleep(50);
   }
   catch(InterruptedException ie){
    System.out.println("Child thread interrupted! " + ie);
   }
  }
 
  System.out.println("Child thread finished!");
 }
 
 public static void main(String[] args) {
 
  /*
   * To create new thread, use
   * Thread(Runnable thread, String threadName)
   * constructor.
   * 
   */
 
  Thread t = new Thread(new CreateThreadRunnableExample(), "My Thread");
 
  /*
   * To start a particular thread, use
   * void start() method of Thread class.
   * 
   * Please note that, after creation of a thread it will not start
   * running until we call start method.
   */
 
  t.start();
 
  for(int i=0; i < 5; i++){
 
   System.out.println("Main thread : " + i);
 
   try{
    Thread.sleep(100);
   }
   catch(InterruptedException ie){
    System.out.println("Child thread interrupted! " + ie);
   }
  }
  System.out.println("Main thread finished!");
 }
}
 
/*
Typical output of this thread example would be
 
Main thread : 0
Child Thread : 0
Child Thread : 1
Main thread : 1
Main thread : 2
Child Thread : 2
Child Thread : 3
Main thread : 3
Main thread : 4
Child Thread : 4
Child thread finished!
Main thread finished!
 
*/

java.lang.NoClassDefFoundError and java.lang.NoSuchMethodError

Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorldApp
If you receive this error, java cannot find your bytecode file, HelloWorldApp.class.
One of the places java tries to find your .class file is your current directory. So if your .class file is in C:\java, you should change your current directory to that. To change your directory, type the following command at the prompt and press Enter:

cd c:\java

The prompt should change to C:\java>. If you enter dir at the prompt, you should see your .java and .class files. Now enter java HelloWorldApp again.
If you still have problems, you might have to change your CLASSPATH variable. To see if this is necessary, try clobbering the classpath with the following command.

set CLASSPATH=

Now enter java HelloWorldApp again. If the program works now, you'll have to change your CLASSPATH variable. To set this variable, consult the Update the PATH variable section in the JDK 6 installation instructions. The CLASSPATH variable is set in the same manner.
 

Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorldApp/class A common mistake made by beginner programmers is to try and run the java launcher on the .class file that was created by the compiler. For example, you'll get this error if you try to run your program with java HelloWorldApp.class instead of java HelloWorldApp. Remember, the argument is the name of the class that you want to use, not the filename.
Exception in thread "main" java.lang.NoSuchMethodError: main
The Java VM requires that the class you execute with it have a main method at which to begin execution of your application. A Closer Look at the "Hello World!" Application discusses the main method in detail.

A simple JDBC application sample code

The basic process for a single data retrieval operation using JDBC would be as follows.

• a JDBC driver would be loaded;
• a database Connection object would be created from using the DriverManager (using the database driver loaded in the first step);
• a Statement object would be created using the Connection object;
• a SQL Select statement would be executed using the Statement object, and a ResultSet would be returned;
• the ResultSet would be used to step through (or iterate through) the rows returned and examine the data.

The following JDBC code sample demonstrates this sequence of calls.
JDBCSample.java

1. import java.sql.*
2.  
3. public class JDBCSample {
4.  
5. public static void main( String args[]) {
6.  
7. String connectionURL = "jdbc:postgresql://localhost:5432/movies;user=java;password=samples";
8. // Change the connection string according to your db, ip, username and password
9.  
10. try {
11.  
12.     // Load the Driver class.
13.     Class.forName("org.postgresql.Driver");
14.     // If you are using any other database then load the right driver here.
15.  
16.     //Create the connection using the static getConnection method
17.     Connection con = DriverManager.getConnection (connectionURL);
18.  
19.     //Create a Statement class to execute the SQL statement
20.     Statement stmt = con.createStatement();
21.  
22.     //Execute the SQL statement and get the results in a Resultset
23.     ResultSet rs = stmd.executeQuery("select moviename, releasedate from movies");
24.  
25.     // Iterate through the ResultSet, displaying two values
26.     // for each row using the getString method
27.  
28.     while (rs.next())
29.         System.out.println("Name= " + rs.getString("moviename") + " Date= " + rs.getString("releasedate");
30. }
31. catch (SQLException e) {
32.     e.printStackTrace();
33. }
34. catch (Exception e) {
35.     e.printStackTrace();
36. }
37. finally {
38.     // Close the connection
39.     con.close();
40. }
41. }
42. }

Read a file line by line in Java - Sample Program

This sample Java program demonstrates how to read a file in Java Line by Line. For this the following two classes DataInputStream and BufferedReader are used. This program can be used to read any text file line by line and process the contents of the file within a Java Program.
Class DataInputStream
A data input stream is use to read primitive Java data types from an underlying input stream in a machine-independent way. An application uses a data output stream to write data that can later be read by a data input stream.
Data input streams and data output streams represent Unicode strings in a format that is a slight modification of UTF-8. (For more information, see X/Open Company Ltd., "File System Safe UCS Transformation Format (FSS_UTF)", X/Open Preliminary Specification, Document Number: P316. This information also appears in ISO/IEC 10646, Annex P.) Note that in the following tables, the most significant bit appears in the far left-hand column.
BufferedReader Read text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines. The buffer size may be specified, or the default size may be used. The default is large enough for most purposes.
In general, each read request made of a Reader causes a corresponding read request to be made of the underlying character or byte stream. It is therefore advisable to wrap a BufferedReader around any Reader whose read() operations may be costly, such as FileReaders and InputStreamReaders. For example,

BufferedReader in
   = new BufferedReader(new FileReader("foo.in"));

will buffer the input from the specified file. Without buffering, each invocation of read() or readLine() could cause bytes to be read from the file, converted into characters, and then returned, which can be very inefficient.
Programs that use DataInputStreams for textual input can be localized by replacing each DataInputStream with an appropriate BufferedReader.

import java.io.*;
class FileRead 
{
   public static void main(String args[])
  {
      try{
    // Open the file that is the first 
    // command line parameter
    FileInputStream fstream = new FileInputStream("textfile.txt");
    // Get the object of DataInputStream
    DataInputStream in = new DataInputStream(fstream);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
    String strLine;
    //Read File Line By Line
    while ((strLine = br.readLine()) != null)   {
      // Print the content on the console
      System.out.println (strLine);
    }
    //Close the input stream
    in.close();
    }catch (Exception e){//Catch exception if any
      System.err.println("Error: " + e.getMessage());
    }
  }
}

Convert numbers to word as per Indian number system in java

This java program converts the number to its equivalent word representation according to indian numbering system. Eg. Lakhs, Crores etc..This program works upto 999999999.

import java.util.*;
public class NumtoWord 
{ 
public static void main(String[] args) 
{ 
String a;
Scanner s = new Scanner(System.in);
System.out.print("Enter a Number : ");
a = s.next();
int b = a.length();
String str[] = {"1","One","2","Two","3","Three","4","Four","5","Five","6","Six","7","Seven","8","Eight","9","Nine","10","Ten","11","Eleven","12","Twelve","13","Thirteen","14","Forteen","15","Fifteen","16","Sixteen","17","Seventeen","18","Eighteen","19","Nineteen","20","Twenty","30","Thirty","40","Fourty","50","Fifty","60","Sixty","70","Seventy","80","Eighty","90","Ninty","100","Hundred"};
System.out.println("");
if (b==9) 
{ 
String s1= a.substring(0,1);
String s2= a.substring(1,2);
String s3= a.substring(2,3);
String s4= a.substring(3,4);
String s5= a.substring(4,5);
String s6= a.substring(5,6);
String s7= a.substring(6,7);
String s8= a.substring(7,8);
String s9= a.substring(8,9);
String s10= a.substring(0,2);
String s11= a.substring(2,4);
String s12= a.substring(4,6);
String s14= a.substring(7,9);
{
if (s10.equals("00"))
System.out.print("");
else if (s1.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s10)) 
System.out.print("\n" + str[r+1] + " Crore ");
}
else
{
{
for (int i=0;i<=40;i++)
if (str[i].equals(s1))
System.out.print("\n" + str[i+37] + " ");
}
{
if(s2.equals("0"))
{
System.out.print("Crore ");
}
else 
for (int j=0;j<=40;j++)
{
if (str[j].equals(s2))
System.out.print(str[j+1] + " Crore ");
}
}
}
}
{
if (s11.equals("00"))
System.out.print("");
else if (s3.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s11)) 
System.out.print(str[r+1] + " Lacks ");
}
else
{
{
for (int k=0;k<=38;k++)
if (str[k].equals(s3))
System.out.print(str[k+37] + " ");
}
{
if(s4.equals("0"))
{
System.out.print("Lacks ");
}
else 
for (int l=0;l<=38;l++)
{
if (str[l].equals(s4))
System.out.print(str[l+1] + " Lacks ");
}
}
}
}
{
if (s12.equals("00"))
System.out.print("");
else if (s5.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s12)) 
System.out.print(str[r+1] + " Thousand ");
}
else
{ 
{
for (int m=0;m<=38;m++)
if (str[m].equals(s5))
System.out.print(str[m+37] + " ");
}
{
if(s6.equals("0"))
{
System.out.print("Thousand ");
}
else 
for (int n=0;n<=38;n++)
{
if (str[n].equals(s6))
System.out.print(str[n+1] + " Thousand ");
}
}
}
}
{
for (int o=0;o<=40;o++)
if (str[o].equals(s7))
System.out.print(str[o+1] + " Hundred ");
}
{
if (s14.equals("00"))
System.out.print("");
else if (s8.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s14)) 
System.out.print(str[r+1]);
System.out.print("\n"); 
}
else
{
for (int p=0;p<=40;p++)
if (str[p].equals(s8))
System.out.print(str[p+37]);
for (int q=0;q<=40;q++)
{
if (str[q].equals(s9))
System.out.print(" " + str[q+1]);
}
} 
System.out.print("\n"); 
}
}
else if (b==8) 
{ 
String s1= a.substring(0,1);
String s2= a.substring(1,2);
String s3= a.substring(2,3);
String s4= a.substring(3,4);
String s5= a.substring(4,5);
String s6= a.substring(5,6);
String s7= a.substring(6,7);
String s8= a.substring(7,8);
String s10= a.substring(1,3);
String s11= a.substring(3,5);
String s12= a.substring(6,8);
{
if (s1.equals("0"))
System.out.print("");
else
for (int i=0;i<=40;i++)
if (str[i].equals(s1))
System.out.print("\n" + str[i+1] + " Crore ");
} 
{
if (s10.equals("00"))
System.out.print("");
else if (s2.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s10)) 
System.out.print(str[r+1] + " Lacks ");
}
else
{
{
for (int k=0;k<=38;k++)
if (str[k].equals(s2))
System.out.print(str[k+37] + " ");
}
{
if(s3.equals("0"))
{
System.out.print("Lacks ");
}
else 
for (int l=0;l<=38;l++)
{
if (str[l].equals(s3))
System.out.print(str[l+1] + " Lacks ");
}
}
}
}
{
if (s11.equals("00"))
System.out.print("");
else if (s4.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s11)) 
System.out.print(str[r+1] + " Thousand ");
}
else
{ 
{
for (int m=0;m<=38;m++)
if (str[m].equals(s4))
System.out.print(str[m+37] + " ");
}
{
if(s5.equals("0"))
{
System.out.print("Thousand ");
}
else 
for (int n=0;n<=38;n++)
{
if (str[n].equals(s5))
System.out.print(str[n+1] + " Thousand ");
}
}
}
}
{
for (int o=0;o<=40;o++)
if (str[o].equals(s6))
System.out.print(str[o+1] + " Hundred ");
}
{
if (s12.equals("00"))
System.out.print("");
else if (s7.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s12)) 
System.out.print(str[r+1]);
System.out.print("\n"); 
}
else
{
for (int p=0;p<=40;p++)
if (str[p].equals(s7))
System.out.print(str[p+37]);
for (int q=0;q<=40;q++)
{
if (str[q].equals(s8))
System.out.print(" " + str[q+1]);
}
} 
System.out.print("\n"); 
}
}
else if (b==7) 
{ 
String s1= a.substring(0,1);
String s2= a.substring(1,2);
String s3= a.substring(2,3);
String s4= a.substring(3,4);
String s5= a.substring(4,5);
String s6= a.substring(5,6);
String s7= a.substring(6,7);
String s10= a.substring(0,2);
String s11= a.substring(2,4);
String s12= a.substring(5,7);
{
if (s10.equals("00"))
System.out.print("");
else if (s1.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s10)) 
System.out.print(str[r+1] + " Lacks ");
}
else
{
{
for (int k=0;k<=38;k++)
if (str[k].equals(s1))
System.out.print(str[k+37] + " ");
}
{
if(s2.equals("0"))
{
System.out.print("Lacks ");
}
else 
for (int l=0;l<=38;l++)
{
if (str[l].equals(s2))
System.out.print(str[l+1] + " Lacks ");
}
}
}
}
{
if (s11.equals("00"))
System.out.print("");
else if (s3.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s11)) 
System.out.print(str[r+1] + " Thousand ");
}
else
{ 
{
for (int m=0;m<=38;m++)
if (str[m].equals(s3))
System.out.print(str[m+37] + " ");
}
{
if(s4.equals("0"))
{
System.out.print("Thousand ");
}
else 
for (int n=0;n<=38;n++)
{
if (str[n].equals(s4))
System.out.print(str[n+1] + " Thousand ");
}
}
}
}
{
for (int o=0;o<=40;o++)
if (str[o].equals(s5))
System.out.print(str[o+1] + " Hundred ");
}
{
if (s12.equals("00"))
System.out.print("");
else if (s6.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s12)) 
System.out.print(str[r+1]);
System.out.print("\n"); 
}
else
{
for (int p=0;p<=40;p++)
if (str[p].equals(s6))
System.out.print(str[p+37]);
for (int q=0;q<=40;q++)
{
if (str[q].equals(s7))
System.out.print(" " + str[q+1]);
}
} 
System.out.print("\n"); 
}
}
else if (b==6) 
{ 
String s1= a.substring(0,1);
String s2= a.substring(1,2);
String s3= a.substring(2,3);
String s4= a.substring(3,4);
String s5= a.substring(4,5);
String s6= a.substring(5,6);
String s10= a.substring(1,3);
String s11= a.substring(4,6);

{
if(s1.equals("0"))
System.out.print("");
else 
{
for (int j=0;j<=40;j++)
if (str[j].equals(s1)) 
System.out.print(str[j+1] + " Lacks ");
}
}
{
if (s10.equals("00"))
System.out.print("");
else if (s2.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s10)) 
System.out.print(str[r+1] + " Thousand ");
}
else
{ 
{
for (int m=0;m<=40;m++)
if (str[m].equals(s2))
System.out.print(str[m+37] + " ");
}
{
if(s3.equals("0"))
{
System.out.print("Thousand ");
}
else 
for (int n=0;n<=38;n++)
{
if (str[n].equals(s3))
System.out.print(str[n+1] + " Thousand ");
}
}
}
}
{
if(s4.equals("0"))
System.out.print("");
else 
{
for (int o=0;o<=40;o++)
if (str[o].equals(s4)) 
System.out.print(str[o+1] + " Hundred ");
}
}
{
if (s11.equals("00"))
System.out.print("");
else if (s5.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s11)) 
System.out.print(str[r+1]);
System.out.print("\n"); 
}
else
{
for (int p=0;p<=40;p++)
if (str[p].equals(s5))
System.out.print(str[p+37]);
for (int q=0;q<=40;q++)
{
if (str[q].equals(s6))
System.out.print(" " + str[q+1]);
}
} 
System.out.print("\n"); 
}
}
else if (b==5) 
{ 
String s1= a.substring(0,1);
String s2= a.substring(1,2);
String s3= a.substring(2,3);
String s4= a.substring(3,4);
String s5= a.substring(4,5);
String s10= a.substring(0,2);
String s11= a.substring(3,5);
{
if (s10.equals("00"))
System.out.print("");
else if (s1.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s10)) 
System.out.print(str[r+1] + " Thousand ");
}
else
{ 
{
for (int m=0;m<=38;m++)
if (str[m].equals(s1))
System.out.print(str[m+37] + " ");
}
{
if(s2.equals("0"))
{
System.out.print("Thousand ");
}
else 
for (int n=0;n<=38;n++)
{
if (str[n].equals(s2))
System.out.print(str[n+1] + " Thousand ");
}
}
}
}
{
for (int o=0;o<=40;o++)
if (str[o].equals(s3))
System.out.print(str[o+1] + " Hundred ");
}
{
if (s11.equals("00"))
System.out.print("");
else if (s4.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s11)) 
System.out.print(str[r+1]);
System.out.print("\n"); 
}
else
{
for (int p=0;p<=40;p++)
if (str[p].equals(s4))
System.out.print(str[p+37]);
for (int q=0;q<=40;q++)
{
if (str[q].equals(s5))
System.out.print(" " + str[q+1]);
}
} 
System.out.print("\n"); 
}
}
else if (b==4) 
{ 
String s1= a.substring(0,1);
String s2= a.substring(1,2);
String s3= a.substring(2,3);
String s4= a.substring(3,4);
String s10= a.substring(2,4);
{
if(s1.equals("0"))
System.out.print("");
else 
{
for (int j=0;j<=40;j++)
if (str[j].equals(s1)) 
System.out.print(str[j+1] + " Thousand ");
}
}
{
if(s2.equals("0"))
System.out.print("");
else 
{
for (int o=0;o<=40;o++)
if (str[o].equals(s2)) 
System.out.print(str[o+1] + " Hundred ");
}
}
{
if (s10.equals("00"))
System.out.print("");
else if (s3.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s10)) 
System.out.print(str[r+1]);
System.out.print("\n"); 
}
else
{
for (int p=0;p<=40;p++)
if (str[p].equals(s3))
System.out.print(str[p+37]);
for (int q=0;q<=40;q++)
{
if (str[q].equals(s4))
System.out.print(" " + str[q+1]);
}
} 
System.out.print("\n"); 
}
}
else if (b==3) 
{ 
String s1= a.substring(0,1);
String s2= a.substring(1,2);
String s3= a.substring(2,3);
String s10= a.substring(1,3);
{
if(s1.equals("0"))
System.out.print("");
else 
{
for (int o=0;o<=40;o++)
if (str[o].equals(s1)) 
System.out.print(str[o+1] + " Hundred ");
}
}
{
if (s10.equals("00"))
System.out.print("");
else if (s2.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s10)) 
System.out.print(str[r+1]);
System.out.print("\n"); 
}
else
{
for (int p=0;p<=40;p++)
if (str[p].equals(s2))
System.out.print(str[p+37]);
for (int q=0;q<=40;q++)
{
if (str[q].equals(s3))
System.out.print(" " + str[q+1]);
}
} 
System.out.print("\n"); 
}
}
else if (b==2) 
{ 
String s1= a.substring(0,1);
String s2= a.substring(1,2);
String s10= a.substring(0,2);
{
if (s10.equals("00"))
System.out.print("");
else if (s1.equals("1"))
{
for (int r=0;r<=40;r++)
if (str[r].equals(s10)) 
System.out.print(str[r+1]);
System.out.print("\n"); 
}
else
{
for (int p=0;p<=40;p++)
if (str[p].equals(s1))
System.out.print(str[p+37]);
for (int q=0;q<=40;q++)
{
if (str[q].equals(s2))
System.out.print(" " + str[q+1]);
}
} 
System.out.print("\n"); 
}
}
else if (b==1) 
{ 
String s1= a.substring(0,1);
for (int q=0;q<=40;q++)
if (str[q].equals(s1))
System.out.print(" " + str[q+1]);
} 
System.out.println("\n"); 
}
}

Iterate a List in Java

This tutorial demonstrates the use of ArrayList, Iterator and a List. There are many ways to iterate a list of objects in Java. This sample program shows you the different ways of iterating through a list in Java.
In java a list object can be iterated in following ways:

• Using Iterator class
• With the help of for loop
• With the help of while loop
• Java 5 for-each loop

Following example code shows how to iterate a list object:

import java.util.Iterator;
import java.util.List;
import java.util.ArrayList;
 
public class IterateAList {
  public static void main(String[] argv) {
 
                ArrayList arrJavaTechnologies = new ArrayList();

                arrJavaTechnologies.add("JSP");
                arrJavaTechnologies.add("Servlets");
                arrJavaTechnologies.add("EJB");
                arrJavaTechnologies.add("JDBC");
                arrJavaTechnologies.add("JPA");
                arrJavaTechnologies.add("JSF");


                //Iterate  with the help of Iterator class
                System.out.println("Iterating with the help of Iterator class");
                Iterator iterator = arrJavaTechnologies.iterator();
                while(iterator.hasNext()){
                        System.out.println( iterator.next() );
                }

                //Iterate  with the help of for loop
                System.out.println("Iterating with the help of for loop");
                for (int i=0; i< arrJavaTechnologies.size(); i++)
                {
                        System.out.println( arrJavaTechnologies.get(i) );
                }

                //Iterate  with the help of while loop
                System.out.println("Iterating with the help of while loop");
                int j=0; 
                while (j< arrJavaTechnologies.size())
                {
                        System.out.println( arrJavaTechnologies.get(j) );
                        j++;
                }
                //Iterate  with the help of java 5 for-each loop
                System.out.println("Iterate  with the help of java 5 for-each loop");
                for (String element : arrJavaTechnologies) // or sArray
                {
                        System.out.println( element );
                }
 
  }
}