JDBC driver for SQLite. It comes in two flavours, a 100% Pure Java driver based on NestedVM or a native JNI library. The pure java driver is compatible, you can follow the Java dream and use it anywhere with no worries. The native driver is fast, and I recommend it wherever possible. Binaries are provided for Windows and Mac OS X.

import java.sql.*;
 
public class Test {
    public static void main(String[] args) throws Exception {
        Class.forName("org.sqlite.JDBC");
        Connection conn = DriverManager.getConnection("jdbc:sqlite:test.db");
        Statement stat = conn.createStatement();
        stat.executeUpdate("drop table if exists people;");
        stat.executeUpdate("create table people (name, occupation);");
        PreparedStatement prep = conn.prepareStatement(
            "insert into people values (?, ?);");
 
        prep.setString(1, "Gandhi");
        prep.setString(2, "politics");
        prep.addBatch();
        prep.setString(1, "Turing");
        prep.setString(2, "computers");
        prep.addBatch();
        prep.setString(1, "Wittgenstein");
        prep.setString(2, "smartypants");
        prep.addBatch();
 
        conn.setAutoCommit(false);
        prep.executeBatch();
        conn.setAutoCommit(true);
 
        ResultSet rs = stat.executeQuery("select * from people;");
        while (rs.next()) {
            System.out.println("name = " + rs.getString("name"));
            System.out.println("job = " + rs.getString("occupation"));
        }
        rs.close();
        conn.close();
    }
} 

Run with:

java -cp .:sqlitejdbc-v044-native.jar -Djava.library.path=. Test

Posted On: 27 April, 2009

Author: mojtaba

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/*
Java Hello World example.
*/
 
public class HelloWorldExample{
 
  public static void main(String args[]){
 
    /*
    Use System.out.println() to print on console.
    */
    System.out.println("Hello World !");
 
  }
 
}
 
/*
 
OUTPUT of the above given Java Hello World Example would be :
 
Hello Wolrd !
 
*/
 

Posted On: 27 April, 2009

Author: mojtaba

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/*
Java Class example.
This Java class example describes how class is defined and being used in Java language.
 
Syntax of defining java class is,
<modifier> class <class-name>{
  // members and methods
}
*/
 
public class JavaClassExample{
  /*
  Syntax of defining memebers of the java class is,
    <modifier> type <name>;
  */
  private String name;
  /*
  Syntax of defining methods of the java class is,
  <modifier> <return-type> methodName(<optional-parameter-list>) <exception-list>{
                    ...
  }
  */
  public void setName(String n){
    //set passed parameter as name
    name = n;
  }
  public String getName(){
    //return the set name
    return name;
  }
  //main method will be called first when program is executed
  public static void main(String args[]){
    /*
    Syntax of java object creation is,
    <class-name> object-name = new <class-constructor>;
    */
    JavaClassExample javaClassExample = new JavaClassExample();
    //set name member of this object
    javaClassExample.setName("Visitor");
    // print the name
    System.out.println("Hello " + javaClassExample.getName());      
  }
}
 
/*
OUTPUT of the above given Java Class Example would be :
Hello Visitor
*/

Posted On: 27 April, 2009

Author: mojtaba

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/*
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 !
*/

Posted On: 27 April, 2009

Author: mojtaba

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Do while loop executes group of Java statements as long as the boolean condition evaluates to true.

It is possible that the statement block associated with While loop never get executed because While loop tests the boolean condition before executing the block of statements associated with it.

In Java programming, sometime it's necessary to execute the block of statements at least once before evaluating the boolean condition. Do while loop is similar to the While loop, but it evaluates the boolean condition after executing the block of the statement.

Do While loop syntax

Do{

<Block of statements>;

}while();

Block of statements is any valid Java code. Boolean condition is any valid Java expression that evaluates to boolean value. Braces are options if there is only one statement to be executed.

Posted On: 27 April, 2009

Author: mojtaba

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/*
  While loop Example
  This Java Example shows how to use while loop to iterate in Java program.
*/
 
public class SimpleWhileLoopExample {
 
  public static void main(String[] args) {
 
    /*
     * Syntax of while loop is
     *
     * while( <condition> )
     *   <loop body>
     *
     * where <condition> is a boolean expression. Loop body is executed as long
     * as condition is true.
     *
     * Loop body may contain more than one statments. In that case it should be
     * enclosed in a block.
     */
 
     int i = 0;
 
     while(i < 5)
     {
       System.out.println("i is : " + i);
       i++;
     }
 
 
     /*
      * The following code will create an infinite loop, since j < 5 will always
      * evaluated to true
      */
     //int j = 0;
     //while(j < 5)
     //  System.out.println("j is : " + j);
 
 
 
  }
}
 
/*
Output would be
i is : 0
i is : 1
i is : 2
i is : 3
i is : 4
*/

Posted On: 27 April, 2009

Author: mojtaba

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Break statement is one of the several control statements Java provide to control the flow of the program. As the name says, Break Statement is generally used to break the loop of switch statement.

Please note that Java does not provide Go To statement like other programming languages e.g. C, C++.

Break statement has two forms labeled and unlabeled.

Posted On: 27 April, 2009

Author: mojtaba

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In this article I want to show you to write a simple hello world example using Java & NetBeans IDE 6.

Posted On: 27 April, 2009

Author: mojtaba

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One question that a lot of beginning programmers have is: "Now that I've created my application in the IDE, how do I get it to work from the command line outside of the IDE." Similarly, someone might ask, "How do I distribute this application to other users without having to give them the whole IDE as well?"

The answers to these questions are relatively simple, but not necessarily obvious. This document addresses those questions by taking you through the basics of using NetBeans IDE 5.0 to prepare your applications for distribution and then deploying those applications. In addition, this document provides information that you might need to configure your system (or which you might need to pass on to the users of your application). We will show a few different approaches for deploying an application, so that users can access the application by:

• Double-clicking the application's Java Archive (JAR) file.
• Calling the application from the command line.
• Calling the application from a script file.

Along the way, we will cover some basics of JAR file structure and how JAR files are dealt with inside IDE projects.

Posted On: 27 April, 2009

Author: mojtaba

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