Archive for avril 2023

VB.Net Count Character Occurrence

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How To Count Specific Character Occurrence In A String Using Visual Basic.Net 

vb.net specific char count
In This VB.Net Tutorial  We Will See How To Count The Number Of Selected Char Occurrences In A TextBox Text Using Visual Basic.Net Programming Language And Visual Studio Editor.


Project Source Code:

Public Class FormCharOccurrence

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Dim txt As String
        txt = TextBox1.Text

        Dim occurrence As Integer
        occurrence = 0

        For i As Integer = 0 To txt.Length - 1

            If txt(i) = TextBox2.Text.ToCharArray()(0) Then

                occurrence += 1

            End If

        Next

        MsgBox(occurrence)

    End Sub
End Class


///////////////OUTPUT:

















































vb/net count char occurrences



  
  
  
  
  
  
    
    








    
    


  
  
  
  
  
  
  
  
  
















            

          

          

        

          

        













VB.Net Words Count








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How To Count Words In A String Using Visual Basic.Net 

















words count in vb.net











In This VB.Net Tutorial  We Will See How To Count The Number Of Words In A TextBox Text Using Visual Basic.Net Programming Language And Visual Studio Editor.















Project Source Code:







Public Class VbWordsCount







    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click







        Dim txt As String



        txt = TextBox1.Text







        Dim separ() As Char = {" "}







        Dim count As Integer







        count = txt.Split(separ, StringSplitOptions.RemoveEmptyEntries).Length







        MsgBox(count.ToString())















    End Sub



End Class











///////////////OUTPUT:

























































get string words count using vb.net







  
  
      








    
    


  
  
  
  
















            

          

          

        

          

        













VB.Net TextBox Allow Only Alphabet








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How To Make A TextBox Accept Only Alphabet Values Using Visual Basic.Net

























vb.net textbox allow only alphabet

































In This VB.Net Tutorial we will See How To Make A TextBox That Allow Only Letter Characters + White Space On KeyPress Event using Visual Basic.Net Programming Language And Visual Studio IDE .















Project Source Code:











Public Class TextBox_Only_Alphabet











    Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox1.KeyPress







        If Not Char.IsControl(e.KeyChar) AndAlso Not Char.IsLetter(e.KeyChar) AndAlso Not Char.IsWhiteSpace(e.KeyChar) Then







            e.Handled = True







        End If







    End Sub



End Class



















OUTPUT:



























































textbox allow only characters using vbnet











  
  
  
  
  
  
                








    
    


  
  
  
  
  
  
  
  
















            

          

          

        

          

        













Java Count Words In Text File








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How To Count Words Inside A Txt File Using Java NetBeans











































Count Words In Text File Using Java





































In this Java Tutorial we will see How To Get The Number Of Words In A Text File Using For Loop + BufferedReader In Java NetBeans .



















Project Source Code:







private void jButtonWordCountActionPerformed(java.awt.event.ActionEvent evt) {                                                 



       



        String filePath = "C:\\Users\\omar\\Desktop\\file2.txt";



        File file = new File(filePath);



        



        try {



            BufferedReader br = new BufferedReader(new FileReader(file));



            Object[] lines = br.lines().toArray();



            



            int wordCount = 0;



            



            for(int i = 0; i < lines.length; i++){



                String[] words = lines[i].toString().split(Pattern.quote(" "));



                // get word count line by line



                wordCount += words.length;



               }



             System.out.println(wordCount);



            



        } catch (FileNotFoundException ex) {



            Logger.getLogger(java_text_words_count.class.getName()).log(Level.SEVERE, null, ex);



        }



        



    } 








  








    
    
























            

          

          

        

          

        













VB.Net Using Regex








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How To Use Regular Expressions In Visual Basic .Net











































Using Regular Expressions In Visual Basic .Net

































































In this VB.NET Tutorial we will see How To Use Regular Expression To Verfiy Email Address, Phone Number, Website URL On A Button Click Event In Visual Basic.Net Programming Language And Visual  Studio Editor.



















Project Source Code:











Imports System.Text.RegularExpressions







Public Class Regular_Expression







    Private Sub ButtonVerify_Click(sender As Object, e As EventArgs) Handles ButtonVerify.Click











        ' mail@mail.com                          =>  ^([\w]+)@([\w]+)\.([\w]+)$



        ' http(s)://www.google.com               =>  ^((http|https)://www\.)([\w]+)\.([\w]+)$



        ' Phone Number Like : 0011 *** *** ***   =>  ^(0011)(([  ][0-9]{3}){3})$







        execReg("^([\w]+)@([\w]+)\.([\w]+)$", TextBoxEmail, LabelEmail)



        execReg("^(0011)(([  ][0-9]{3}){3})$", TextBoxPhone, LabelPhone)



        execReg("^((http|https)://www\.)([\w]+)\.([\w]+)$", TextBoxWebsite, LabelSite)







    End Sub











    Sub execReg(ByVal pattern As String, ByVal tbx As TextBox, ByVal lbl As Label)







        Dim rgx As New Regex(pattern)







        If rgx.IsMatch(tbx.Text) Then







            lbl.Text = "Valid"



            lbl.ForeColor = Color.Green







        Else







            lbl.Text = "InValid"



            lbl.ForeColor = Color.Red







        End If







    End Sub







End Class








OutPut:



Visula Basic .Net Regular Expressions





































  
    
              








    
    


  
  
  
  
  
  
















            

          

          

        

          

        













Java Remove String First Or Last Char








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How To Delete String First / Last Character Using Java NetBeans











































delete first or last character using java





















































In this Java Tutorial we will see How To Delete The Char At The beginning Or The End Of A JTextFields Text ,On Jbutton Click Event The Program Will Remove Text Letter By Letter In Java NetBeans .



















Project Source Code:











// remove first character



private void jButtonRFActionPerformed(java.awt.event.ActionEvent evt) {                                          



       



        if(jTextField1.getText().length() > 0)



        {



         String txtMinusFirstChar = jTextField1.getText().substring(1, jTextField1.getText().length());



         jTextField1.setText(txtMinusFirstChar);    



        }



        



        



    }                                         







// remove last character



    private void jButtonRLActionPerformed(java.awt.event.ActionEvent evt) {                                          



      



        if(jTextField1.getText().length() > 0)



        {



         String txtMinusLastChar = jTextField1.getText().substring(0, jTextField1.getText().length() - 1);



         jTextField1.setText(txtMinusLastChar);    



        }



        



    }                                         











// remove first & last character



    private void jButtonRFLActionPerformed(java.awt.event.ActionEvent evt) {                                           



       



        if(jTextField1.getText().length() > 1)



        {



         String txtMinusLFChar = jTextField1.getText().substring(1, jTextField1.getText().length() - 1);



         jTextField1.setText(txtMinusLFChar);    



        }else{



            jTextField1.setText("");



        }



        



    } 




OutPut:



java delete first & last char





















  
  
  
    
              








    
    


  
  
  
  
  
















            

          

          

        

          

        













Java Create, Write, Delete Text File








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How To Create And Write And Delete Txt File Using Java NetBeans











































java create writr remove text file









































In this Java tutorial will demonstrate how to create a text file with a custom name and write data from a jTextArea into the file. Additionally, we will learn how to remove the file using the FileWriter and BufferedWriter classes in Java NetBeans, all in a step-by-step manner .



















Project Source Code:











// create and write in text file



private void jButtonCreateAndWriteActionPerformed(java.awt.event.ActionEvent evt) {                                                      



      



        String filePath = jTextFieldFilePath.getText();



        



        File file = new File(filePath);



        



        if(!file.exists()){



            try {



                



                file.createNewFile();



                FileWriter wr = new FileWriter(file);



                BufferedWriter bw = new BufferedWriter(wr);



                



                bw.write(jTextArea1.getText());



                



                bw.close();



                wr.close();



                



            } catch (IOException ex) {



                Logger.getLogger(TxtFile_Create_Write_Delete.class.getName()).log(Level.SEVERE, null, ex);



            }



        }



        



    }                                                     







   // delete file



    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         



        



        String filePath = jTextFieldFilePath.getText();



        



        File file = new File(filePath);



        



        if(file.exists()){



            file.delete();



        }



        



    } 








OutPut:



create write delete text file using java







  
  
  
  
  
  
  
              








    
    


  
  
  
  
  
  
  
















        

      















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