Remove spaces from eclipse | Remove empty lines from java

Remove empty lines from java

1,Install notepad ++
2,Download TextFx plugin
3,Unzip & copy dll file to Program Files\Notepad++\plugins
4,Open Notepad++
5,In menu >TextFX > TextFX Edit > Delete Blank Lines


Remove spaces from eclipse.Remove empty lines from java,Remove empty lines from notepad

String Tokenizer |String Splitter | Java Tutorial

The string tokenizer class allows an application to break a string into tokens. The tokenization method is much simpler than the one used by the StreamTokenizer class. The StringTokenizer methods do not distinguish among identifiers, numbers, and quoted strings, nor do they recognize and skip comments.

String Tokenizer Tutorial video

Create GUI Java Swing using Eclipse

Right-click on the Eclipse project in the Package Explorer
• On the context menu select “New / Class”.
• Set ‘Source folder’ to Calculator/src
• Set the ‘Package’ to calculator.
• Set the ‘Name’ to View
• Set Modifiers to public
• Set Superclass to javax.swing.JFrame
• Click fnish

Now open GUI class and bottom tab switch to Design

Tags:Create GUI Java Swing using Eclipse,Create GUI using Eclipse,Create GUI using Eclipse Tutorial,Create GUI in eclipse ide,Create Java swing using Eclipse

Add spaces in a String using Java

If u would like to print String "123" as "1 2 3" then follow this code.

yourString.replace("", " ").trim();

Above code just replacing all empty place with Space & remove starting space with trim           method

Add leading zeros for binary conversion in java

If u convert Decimal 15 to binary,you will get  Binary 1110 So you may want to add leading zero Ex:00001110

Step1:Find how many zeros do you need ?

if your input is16 then log2 16=4 zeros
if your input is 15 then log2 15=3 zeros not correct :-) So check 3 mod 2  !=0 and add one to it 3+1=4



int zeros=0;        
zeros=(int) (Math.log(input)/ Math.log(2));
if (zeros%2!=0) zeros=zeros+1;


Step2:Add these zeros to your binary output


String formatted=String.format("%0"+zeros+"d\n", Integer.parseInt(Integer.toBinaryString(count)));
System.out.println(formatted);

logarithm base 2 calculation in java

By default java provides base 10 using In build Math class


Base 10 log


Math.log(input) ;

Base 2 log

Math.log(input) / Math.log(2);

This methods will return values in double so if you need integer 

int zeros=(int) (Math.log(input)/ Math.log(2));

Assign user as Administrator in Windows

If you are managing computers you probably have to create one user account with administrator rights for all the computers.

1,Create a new user (Administrator,Admin)
2,To add this account to Administrator group follow this tutorial
   Add a user to Administrator group
   Above link explains how to add domain user accounts to Administrator group.

3,To add local user to Admin rights,Click Locations

4,Login as current Administrator Username/password
5,Change location to local computer from entire directory
6,Enter Username and click "Check Names" button
7,Click Ok ,Login as a new user.

PLC Converter -My Android application

I created new Android app for PLC Engineers to troubleshoot PLC Analog Input signal..

Download PLC Converter from Android Market

Android app upload error The icon for your application is not valid. Please use a 48x48 PNG

The icon for your application is not valid. Please use a 48x48 PNG this is most common error you will get while uploading to Android Market.


This is due to Icons resolution error in different folders.Use mspaint resize command and save it to drawable folder like below.


drawable-hdpi -72x72
drawable-mdpi-48x48
drawable-ldpi -36x36

Send email from android application | Feedback Email for android app

1,Create button in xml layout


<Button
        android:id="@+id/feedback"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Feedback"
        android:textSize="15dp" />




2,In Java Class


   Button Myfeedbackbutton=(Button)findViewById (R.id.feedback);  (get button id)
Myfeedbackbutton.setOnClickListener(new View.OnClickListener()  (Click Listener)
  {


public void onClick(View v) {

 Intent feedback1= new Intent(android.content.Intent.ACTION_SEND);
 feedback1.setType("text/plain");
 feedback1.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{"Your Email"});
  feedback1.putExtra(android.content.Intent.EXTRA_SUBJECT, "Email Title");
  startActivity(feedback1); 
}
  
  });

Using Buttons in Android apps development

This Tutorial shows how to use Buttons in  Android apps development

1,Drag & Drop Button from Eclipse IDE

2,Select Properties and Assign name & Text Size

3,Right Click on button & select Edit ID ,Ex :Button3

4,Link this Button3 to Java by

//Start of Existing code

protected void onCreate(Bundle savedInstanceState) {   //Executes when app launched

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.main);            //Running Main.xml

//End of Existing code

//Start > Adding Button click event

Button Button3=(Button)findViewById (R.id.Button3);

 Button3.setOnClickListener(new View.OnClickListener() 

{

public void onClick(View v) {

// TODO Auto-generated method stub //Write your Code here

startActivity(new Intent ("com.mani.Convertor.TutorialOne")); //In my case I opened new Class

}

});

//End > Adding Button click event

Android app development SDK Installation Tutorial

Follow these steps

1,Download Java sdk JDK   and Install it

2,Download Android SDK from here and Install it

http://developer.android.com/sdk/index.html

3,Download Eclipse IDE for Java Developers from here and Install it

http://www.eclipse.org/downloads/packages/eclipse-ide-java-developers/indigosr1

4,Shortcut eclipse file to your desktop and run as Administrator

5,Go to help >Install new Software >Add

In Add Repository box Enter Name &
Enter link as https://dl-ssl.google.com/android/eclipse/ and click ok


6,Select all and Import


7,In eclipse >windows>preference>Android> Copy the Android SDK location


8,Link Android Emulator by click on Android virtual device manager

9,Add new Emulator by giving name and select Android version  >Create AVD

10,Link your project to emulator by using

Run>Run Configuration>Android Application >Click new select your project and emulator and click ok

How to run batch file in Minimized

If u run batchfile for some purpose very often,It's quite a bit annoying to run in maximize mode

Follow these steps to run batch file in Minimized

1,Make short cut to batchfile

2,Right click on Shortcut and Properties

3,Under Shortcut tab Chenge Run to Normal window to minimized

4,In your program instead of calling ".bat" call ".lnk"

----------- .lnk is the shoortcut extension ------------------

How to download restricted photos from Flickr

In Flickr, if you download protected photos It will save as spaceball image so use this trick to download.

1,Open the Flickr Picture in Mozilla Firefox or chrome
2,Click Tools and Select Page Info or Page source
3,Search for "Jpg"
4,Copy the link and paste into browser
5,Click SaveAS and SAVE the Image

How to Insert Html or XML code in blogger

Simple bits will convert HTML or XML code into post body code

1,Copy the code you want to convert

2,Paste into Enter Markup

3,Click Process

4,Copy the Modified code and paste into your content body

Using app.config file in C# Visual Studio

If  would like to read some value from app.config file follow these steps.

1,Add System Configuration namespace to reference

Otherwise you will get 'ConfigurationManager' does not exist error

2,Import name space

using System.Configuration

3,Read String from config file

ConfigurationManager.ConnectionStrings["SqlConnectionString"].ConnectionString;

4,Sample App.config file

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <connectionStrings>
    <add name="SqlConnectionString" 
connectionString="Data Source=localhost\SQLEXPRESS;Initial 
Catalog=library;Integrated Security=True;" />

  </connectionStrings>
</configuration>

Using Timer in C#

1,Drag & drop timer from Visual Studio tool box

2,To start timer

timer1.Start();

3,To Stop Timer

timer1.Stop();

4,Timer Tick event (Executes every second if timer started)

private void timer1_Tick(object sender, EventArgs e)
{
commands
}

5,To count down using Timer

private void timer1_Tick(object sender, EventArgs e)
{
label3.Text = (Convert.ToInt32(label3.Text) - 1).ToString();
}

Easy way to handle combo box in C#

1,Drag & drop Combo box in form in visual studio
2,Assign list like below picture

3,Assign default value in Combo box when form load

private void Form1_Load(object sender, EventArgs e)
        {
            
            comboBox1.SelectedIndex = 0;
        }
 

4,Double click on combo box will show SelectedIndexChanged event,Use Switch command to write your different event code.

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (comboBox1.SelectedIndex){

                case 0: shutdown = "-s"; break;
                case 1: shutdown = "-r"; break;
                case 2: shutdown = "-l"; break;

            
            
            }

Disable Auto Logon on windows

Pressing "Shift" key while windows loading will disable autologin script and enable visiblity of Windows login box

Enable Task Manager in Windows

Click Start -> Run Type in "regedit" and Enter.

Search for HKEY_CURRENT_USER -> Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ System.

Look for: DisableTaskMgr. Click on REG_DWORD. Value: 1=Enable this key (disables TaskManager); Value: 0=Disable (enables TaskManager)