RPC Program for Simple Calculator

RPC Program for Simple Calculator

Submitted By: Shreeram

RMI Program to Display Addition of Two Numbers

RMI Program to Display Addition of Two Numbers

Submitted By - Mr. Shreeram.

Implementing Remote Method Invocation (RMI) Using Java

Remote Method Invocation

Java Program to Implement Transmission Control Protocol (TCP)

Transmission Control Protocol

Study of Connection-oriented approach (TCP)

Client-Server program to disply Time

Java Program to implement User Datagram Protocol (UDP)

User Datagram Protocol

Study of Connection-less approach using datagram-approach (UDP) 

Program to input numbers from user using array and to calculate their Sum

Program to input numbers from user using array and to calculate their Sum

Code:

/**
 * Program to input numbers from user using array and to calculate their Sum.
 **/
import java.io.*;
public class Arry_Input
{
    public static void main()throws IOException
    {
        try
        {
            int sum =0;
         int ary[] = new int[3];
          BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
         for(int i=0;i<3;i++)
         {
             System.out.print("Enter number "+(i+1)+" ==> ");
             ary[i] = Integer.parseInt(br.readLine());
         }
         for(int i1=0; i1<3; i1++)
         {
            sum = sum+ ary[i1];
         }
         System.out.print("Sum of  numbers ==> "+sum);
    }
    catch(Exception z)
    {
        System.out.println(z.toString());
    }
}
}

OUTPUT
Enter number 1 ==> 10
Enter number 2 ==> 20
Enter number 3 ==> 30
Sum of numbers ==> 60

Program to demonstrate Linear Search Using Arrays

Program to demonstrate Linear Search Using Arrays

Code:

/**
 * Program to demonstrate Linear Search Using Arrays.
 **/
import java.io.*;
public class Arry_Search
{
     public static void main()throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       System.out.print("Enter the number of elements you want to input ==> ");
       int size = Integer.parseInt(br.readLine());
        int arry[] = new int[size];
        int flag = 0, loc = 0;
        for(int i=0;i<arry.length;i++)
         {
             System.out.print("Enter number "+(i+1)+" ==> ");
             arry[i] = Integer.parseInt(br.readLine());
         }
        System.out.print("Enter number to be searched ==> ");
        int num = Integer.parseInt(br.readLine());
        for(int i = 0; i < arry.length ;i++ )
        {
            if (arry[i] == num)
            {
                flag = 1;
                loc = i;
                break;
            }
        }
        if (flag == 1)
        {
            System.out.println("Number "+num+" found in "+(loc+1)+" location");
        }
        else
        {
            System.out.println("Number not found ");
        }
    }
}

OUTPUT
Enter the number of elements you want to input ==> 4
Enter number 1 ==> 10
Enter number 2 ==> 20
Enter number 3 ==> 30
Enter number 4 ==> 40
Enter number to be searched ==> 30
Number 30 found in 3 location

Program to Demonstrate Typecasting in Java (BlueJ)

Program to Demonstrate Typecasting in Java (BlueJ)

Code:

/***** PROGRAM TO DEMONSTRATE TYPECASTING *****/
public class TypeCast
{
    public static void main()
    {
        System.out.println("***** Type Cast Demo *****");
        int i = 10;
        float f = 10.10f;
        double d = 12.12;
        char c = 'a';
        boolean b = true;
       
        int res1 = (int) f; // EXPLICIT TYPE CASTING
        System.out.println("type cast float 10.10 to int ==> "+res1);
        System.out.println("Type cast char "+ c + " to int ==> "+(int)c);
        double resd = i+f; // IMPLICIT TYPE CASTING
        System.out.println("type cast addition of "+i+ " + " + f + " = "+resd);
       
     
    }
}

OUTPUT:
***** Type Cast Demo *****
type cast float 10.10 to int ==> 10
Type cast char a to int ==> 97
type cast addition of 10 + 10.1 = 20.100000381469727

Program to Demonstrate Call by Value and Call by Reference in Java (BlueJ)

Program to Demonstrate Call by Value and Call by Reference in Java (BlueJ)

A) Program to Demonstrate Call by Reference
code:

/***** PROGRAM TO DEMONSTRATE CALL BY REFERENCE *****/
public class CallByRef
{
   public static  int num1 = 100, num2 = 200;
    public static void main()
    {
         CallByRef cbr = new CallByRef();
        
        System.out.println("***** Program to demonstrate call by reference *****");
        System.out.println("Value of num1 before call to swap :"+cbr.num1);
        System.out.println("Value of num2 before call to swap :"+cbr.num2);
        System.out.println("***********************************************");
      
        swap(cbr); // calling swap method by reference
       
        System.out.println("Value of num1 after call to swap :"+cbr.num1);
        System.out.println("Value of num2 after call to swap :"+cbr.num2);
        System.out.println("***********************************************");
    }
    public static void swap (CallByRef cbr2)
    {
        int temp;
        temp = cbr2.num1;
        cbr2.num1 = cbr2.num2;
        cbr2.num2 = temp;
       
        System.out.println("Value of num1 in swap :"+cbr2.num1);
        System.out.println("Value of num2 in swap :"+cbr2.num2);
        System.out.println("***********************************************");
    }
}

OUTPUT:
***** Program to demonstrate call by value *****
Value of num1 before call to swap :100
Value of num2 before call to swap :200
***********************************************
Value of num1 in swap :200
Value of num2 in swap :100
***********************************************
Value of num1 after call to swap :200
Value of num2 after call to swap :100
***********************************************

A) Program to Demonstrate Call by Value

Code: 

/***** PROGRAM TO DEMONSTRATE CALL BY VALUE *****/
public class CallByVal
{
    public static void main()
    {
        int num1 = 100, num2 = 200;
        System.out.println("***** Program to demonstrate call by value *****");
        System.out.println("Value of num1 before call to swap :"+num1);
        System.out.println("Value of num2 before call to swap :"+num2);
       
        swap(num1, num2); // calling swap method by value
       
        System.out.println("Value of num1 after call to swap :"+num1);
        System.out.println("Value of num2 after call to swap :"+num2);
    }
    public static void swap (int num11,int num22)
    {
        int temp;
        temp = num11;
        num11 = num22;
        num22 = temp;
       
        System.out.println("Value of num1 in swap :"+num11);
        System.out.println("Value of num2 in swap :"+num22);
       
    }
   
}

OUTPUT:
***** Program to demonstrate call by value *****
Value of num1 before call to swap :100
Value of num2 before call to swap :200
Value of num1 in swap :200
Value of num2 in swap :100
Value of num1 after call to swap :100
Value of num2 after call to swap :200

Program to Demonstrate Method Overloading in Java (BlueJ)

Program to Demonstrate Method Overloading in Java (BlueJ)

Code:

/***** PROGRAM TO DEMONSTRATE METHOD OVERLOADING *****/
public class methodOverloading
{
    public static void main()
    {
        int num1 = 10, num2 = 20;
        float num3 = 10.10f;
       
        methodOverloading call = new methodOverloading();
       
        call.add(num1, num2);
        call.add(num1, num2, 30);
        methodOverloading.add(num1, num3);
        add(30.30f, num2);
       
    }
    public static void add(int no1 , int no2)
    {
        System.out.println("Addition of "+no1+ " and "+no2+ " ==> "+(no1+no2));
    }
    public static void add(int no1 , float no2)
    {
        System.out.println("Addition of "+no1+ " and "+no2+ " ==> "+(no1+no2));
    }
    public static void add(float no1 , int no2)
    {
        System.out.println("Addition of "+no1+ " and "+no2+ " ==> "+(no1+no2));
    }
    public static void add(int no1 , int no2, int no3)
    {
        System.out.println("Addition of "+no1+ " + "+no2+ " + "+no3+" ==> "+(no1+no2+no3));
    }
   
}

OUTPUT:
Addition of 10 and 20 ==> 30
Addition of 10 + 20 + 30 ==> 60
Addition of 10 and 10.1 ==> 20.1
Addition of 30.3 and 20 ==> 50.3

Program to Demonstrate Return Type in Java (BlueJ)

Program to Demonstrate Return Type, Ternary Operator , Call by Reference and Odd Even Check in Java (BlueJ)
Code:

/ ***** PROGRAM TO DEMONSTRATE RETURN TYPE, TERNARY OPERATOR , CALL BY REFERENCE AND ODD EVEN CHECK ******/

public class ReturnDemo
{
     public static int num = 101;
    
    public static void checkOddEven()
    {
         ReturnDemo rd = new ReturnDemo();// object creation
        
      String rply = rd.check(rd);
      System.out.println(rd.num+ " is a "+rply+" number");
    }
    public static String check(ReturnDemo rd)
    {
        // Using ternery operator
        String ans = (rd.num % 2 == 0)? "EVEN" : "ODD";
        return ans;
    }
}

OUTPUT:
101 is a ODD number

J2ME Program to Record Data and Print it to the Console

J2ME Program to Record Data and Print it to the Console

Code:

/*J2ME Program to Record Data and Print it to the Console*/
import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;

public class RecordStoreMIDlet extends MIDlet implements CommandListener
{
  private Display display;
  private Alert alert;
  private Form form;
  private Command exit, start, close;
  private RecordStore r_store;
  private Image image;
  public void startApp()
{
    try{image = Image.createImage("/error.png");}catch(Exception e){}
    display = Display.getDisplay(this);
    start = new Command("Start", Command.SCREEN, 1);
    close = new Command("Close", Command.SCREEN, 1);
    exit = new Command("Exit", Command.SCREEN, 1);
    form = new Form("Record Store");
    form.addCommand(start);
    form.addCommand(close);
    form.addCommand(exit);
    form.setCommandListener(this);
    display.setCurrent(form);
  }
  public void pauseApp(){}
  public void destroyApp(boolean unconditional){
    notifyDestroyed();
  }
  public void commandAction(Command c, Displayable displayable){
    String label = c.getLabel();
    if(label.equals("Start")){
      try
{
        r_store = RecordStore.openRecordStore("Sandeep Kumar Suman", true );
        String name = r_store.getName();
        System.out.println("Name: "+name);
      }
catch (Exception error)
{
        alert = new Alert("Exception", error.toString(), image,
        AlertType.WARNING);
        alert.setTimeout(Alert.FOREVER);
        display.setCurrent(alert);
      }          
    }
else if(label.equals("Close"))
{
      Try
      {
       r_store.closeRecordStore();
        System.out.println("Successfully Closed Record");
      }
catch (Exception error)
{
        alert = new Alert("Exception", error.toString(), image,
        AlertType.WARNING);
        alert.setTimeout(Alert.FOREVER);
        display.setCurrent(alert);
 }
    }
else if (RecordStore.listRecordStores() != null)
{
      Try
    {
        RecordStore.deleteRecordStore("Sandeep Kumar Suman");
        System.out.println("Successfully Deleted The Record");
      }
catch (Exception error)
{
        alert = new Alert("Exception", error.toString(), image,
        AlertType.WARNING);
        alert.setTimeout(Alert.FOREVER);
        display.setCurrent(alert);
      }
    }
else if(label.equals("Exit"))
   {
      destroyApp(true);
    }
  }  
 }

Sample Output

Comment bellow for Query and Feedback :)

J2ME Program to Read the Contents of a File

J2ME Program to Read the Contents of a File

Code:

/*J2ME Program to Read the Contents of a File*/
import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class ReadFile extends MIDlet implements CommandListener
{
  private Display display;
  private Form form;
  private Command read, exit;
  private Alert alert;
  public ReadFile()
  {
    display = Display.getDisplay(this);
    read = new Command("Read", Command.SCREEN, 1);
    exit = new Command("Exit", Command.EXIT, 1);  
    form = new Form("Read File");
    form.addCommand(exit);
    form.addCommand(read);
    form.setCommandListener(this);
  }

  public void startApp()
  {
    display.setCurrent(form);
  }
  public void pauseApp()
 {}
  public void destroyApp(boolean unconditional)
  {
    notifyDestroyed();
  }
  public void commandAction(Command c, Displayable s)
{
    String label = c.getLabel();
    if (label.equals("Read")){
      String string = file();
      if (string != null)
{
        alert = new Alert("Reading", string, null, null);
        alert.setTimeout(Alert.FOREVER);
        display.setCurrent(alert, form);
      }
    } else if (label.equals("Exit")){
      destroyApp(false);
    }
  }
  private String file()
{
    InputStream is = getClass().getResourceAsStream("help.txt");
    StringBuffer sb = new StringBuffer();
    try{
      int chars, i = 0;
      while ((chars = is.read()) != -1){
        sb.append((char) chars);
      }
      return sb.toString();
    }
catch (Exception e)
 {}
    return null;
}
}

Sample Output

Comment bellow for Query and Feedback :)

J2ME Program to Access Data from a Specific URL

J2ME Program to Access Data from a Specific URL. The stream connection is used to connect the application to specific URL by Airtime.

Code:

/*J2ME Program to Access Data from a Specific URL*/

import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class AccessUrl extends MIDlet
{
  private Display display;
  String url = "http://localhost/AccessURL/hello.txt";
  public AccessUrl()
  {
    display = Display.getDisplay(this);
  }
  public void startApp()
{
    Try
{
      connection(url);
    }
catch (IOException e)
{
      System.out.println("IOException " + e);
      e.printStackTrace();
    }
  }

  public void pauseApp(){}
  public void destroyApp(boolean unconditional){}
  void connection(String url) throws IOException
{
    StreamConnection sc = null;
    InputStream is = null;
    StringBuffer buffer = new StringBuffer();
    TextBox access;
    Try
{
      sc = (StreamConnection)Connector.open(url);
      is = sc.openInputStream();
      int chars;
      while((chars = is.read()) != -1)
{
        buffer.append((char) chars);
      }
      System.out.println(buffer.toString());
      access = new TextBox("Access Text", buffer.toString(), 1024, 0);
    }
Finally
{
      if(is != null)
      {
        is.close();
      }
      if(sc != null)
       {
        sc.close();
      }
    }
    display.setCurrent(access);
  }
}

Sample Output:

Comment bellow for Query and Feedback :)

J2ME Program to Continuously Scroll a Data Message on the Mobile Screen

J2ME Program to Continuously Scroll a Data Message on the Mobile Screen

Code:

/*J2ME Program to Continuously Scroll a Data Message on the Mobile Screen*/

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

public class TickerExample extends MIDlet implements CommandListener{

  private Display display;

  private Ticker ticker;

  private Command exit;

  private Form form;

    public TickerExample()

{

    form = new Form("Ticker Example");

    display = Display.getDisplay(this);

    ticker = new Ticker ("This is an Ticker Example");

    exit = new Command("Exit", Command.SCREEN, 1);

    form.addCommand(exit);

    form.setCommandListener(this);

    form.setTicker(ticker);

  }

  public void startApp()

  {

    display.setCurrent(form);

  }

  public void pauseApp(){ }

  public void destroyApp(boolean unconditional)

  {

    notifyDestroyed();

  }

  public void commandAction(Command c, Displayable display)

    {

    String label = c.getLabel();

    if (label.equals("Exit")){

      destroyApp(false);

    }

  }}

Sample Output:

comment bellow for Query and Feedback :)

J2ME made simple by Hello World Example

Step1:-   Go to the Ktoolbar of J2ME wireless toolkit from the Start menu.

Step2:- Select the new project tab and give a project name and MIDlet Class Name

Step3:- Select the option CLDC 1.1 ka option and remove the check mark of Mobile Media API

Step4:- The Following window appears

Step5:-   Go to C drive of your Computer 

Step6:- Select the WTK22 folder in C drive

Step7:-  Select the apps folder in the WTK22 folder

Step8:- Select the folder named same as the project we created (i.e. HelloWorld).

Step9:- Select the src folder inside the HelloWorld folder.

Step10:- Copy the HelloWorld.Java file in this src folder

Step11:- Return to the Ktoolbar and now Build the Application.

Step12:- Once the project is successfully built , run the application.

Step13:- OUTPUT

Step14:- Click the Right button on mobile to launch the application 

Comment bellow for Query and Feedback :)