Archive for août 2017

Java Add Node To JTree

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How To Add A New Node To JTree Using Java NetBeans

insert new node to jtree
In this Java Tutorial we will see How To Insert A New Node To JTree From JTextField Using DefaultMutableTreeNode + TreeSelectionModel On Button Click Event In Java NetBeans .


Project Source Code:

private void jButtonAddNodeActionPerformed(java.awt.event.ActionEvent evt) {                                               
        
        // get selected Node
        
        TreeSelectionModel smd = jTree1.getSelectionModel();
        
        if(smd.getSelectionCount() > 0){
            DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) jTree1.getSelectionPath().getLastPathComponent();

            DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(jTextField1.getText());

            selectedNode.add(newNode);

            DefaultTreeModel model = (DefaultTreeModel) jTree1.getModel();

            model.reload();
        }
    }  


OutPut:

insert new node to jtree using java

Java Import Text File Data To JTable

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How To Populate JTable From Txt File Text Using Java NetBeans

Import Txt File Data To JTable Using Java
In this Java Tutorial we will see How To Import Text From Text File And Set It Into JTable Rows Using BufferedReader +  DefaultTableModel On JButton Click In Java programming language and NetBeans IDE .


Project Source Code:

private void jButtonImportActionPerformed(java.awt.event.ActionEvent evt) {                                              
        
        String filePath = "C:\\Users\\Desktop\\table.txt";
        File file = new File(filePath);
        
        try {
            BufferedReader br = new BufferedReader(new FileReader(file));
            // get the first line
            // get the columns name from the first line
            // set columns name to the jtable model
            String firstLine = br.readLine().trim();
            String[] columnsName = firstLine.split(",");
            DefaultTableModel model = (DefaultTableModel)jTable1.getModel();
            model.setColumnIdentifiers(columnsName);
            
            // get lines from txt file
            Object[] tableLines = br.lines().toArray();
            
            // extratct data from lines
            // set data to jtable model
            for(int i = 0; i < tableLines.length; i++)
            {
                String line = tableLines[i].toString().trim();
                String[] dataRow = line.split("/");
                model.addRow(dataRow);
            }
            
            
        } catch (Exception ex) {
            Logger.getLogger(TextFileDataToJTable.class.getName()).log(Level.SEVERE, null, ex);
        }
    } 


OutPut:

Populate JTable Using Text File Text In Java

VB.Net Move Element Inside The Form

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How To Move Object Around The Form In Visual Basic.Net 

vb.net move object inside the form
In This VB.Net Tutorial  We Will See How To Move Panel UP, RIGHT, DOWN, LEFT In The Form By Pressing Arrow Keys Using Visual Basic.Net Programming Language And Visual Studio Editor.


Project Source Code:

Public Class Moving_Element

    Private Sub Moving_Element_KeyDown(sender As Object, e As KeyEventArgs) Handles MyBase.KeyDown

        Select Case e.KeyCode
            ' move up
            Case Keys.Up
                Panel1.Location = New Point(Panel1.Location.X, Panel1.Location.Y - 1)
            ' move down
            Case Keys.Down
                Panel1.Location = New Point(Panel1.Location.X, Panel1.Location.Y + 1)
            ' move right
            Case Keys.Right
                Panel1.Location = New Point(Panel1.Location.X + 1, Panel1.Location.Y)
             ' move left
            Case Keys.Left
                Panel1.Location = New Point(Panel1.Location.X - 1, Panel1.Location.Y)

        End Select

    End Sub
End Class
      
///////////////OUTPUT:





























vbnet moving element










  
      








    
    


 
  
  
    















            

          

          

        

          

        













Javascript Search Item Position In A MultiDimensional Array








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How To Get Value Position In A 2D Array Using Javascript 

























Javascript Search Item Position In A MultiDimensional Array





















































In This Javascript Tutorial we will See How To Search Data In A Multi-Dimensional And Get The Data Positions In The 2D Array Using For Loop Using JS And Netbeans Editor .















Project Source Code:







    <!DOCTYPE html>



<html>



    <head>



        <title>Javascript: search in multidimensional array</title>



        <meta charset="windows-1252">



        <meta name="viewport" content="width=device-width, initial-scale=1.0">



    </head>



    <body>



        



        <p id="txt"></p>



        



        <script>



            



            var ar = [



                       ["A1","B1","B5","D1"],//0



                       ["A2","B2","C2","B5"],//1



                       ["B5","B3","B5","D3"],//2



                       ["A4","B4","C4","B5"],



                       ["A5","B5","C5","D5"]



            ], txt = document.getElementById("txt"), data = "";



            



            for(var i = 0; i < ar.length; i++){// lines



                



                for(var j = 0; j < ar[i].length; j++){ // columns



                    data = data + ar[i][j]+" , ";



                    if(ar[i][j] === "B5"){



                        console.log("POSITION[ " + i + " , " + j +" ]")



                    }



                    



                }



                data = data + "<br>";



            }



            txt.innerHTML = data;



           



         </script>   



        



    </body>



</html>



















OUTPUT:















































































search in multidimensional array In JS







































VB.Net KeyCode








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VB NET Using Key Code





vb.net KeyCode















In This VB.Net Tutorial  We Will See How To Use KeyCode On KeyDown To Check Which Key Is Pressed Like ENTER or SPACE In Visual Basic.Net Programming Language And Visual Studio Editor.















Project Source Code:







Public Class Form_Key_Code







    Private Sub Form_Key_Code_KeyDown(sender As Object, e As KeyEventArgs) Handles MyBase.KeyDown







        Dim code As String



        code = e.KeyCode







        Select Case code







            Case 32



                Label1.Text = "Spacebar"







            Case 13



                Label1.Text = "Enter"







        End Select







    End Sub



End Class



      



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

















vbnet keycode enter





vbnet keycode spacebar


















    















            

          

          

        

          

        













VB.Net KeyChar








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VBNET Using Key Char





VBnet Key Char











In This VB.Net Tutorial  We Will See How To Use KeyChar On KeyPress To Check Which Key Is Pressed Like ENTER or SPACE In Visual Basic.Net Programming Language And Visual Studio Editor.













  
          
    
  

  


Project Source Code:







Public Class Form_key_char











    Private Sub Form_key_char_KeyPress(sender As Object, e As KeyPressEventArgs) Handles MyBase.KeyPress







        Dim ch As String



        ch = e.KeyChar







        Label1.Text = ch







        Select Case ch







            Case Convert.ToChar(Keys.Enter)



                Label1.Text = "Enter"







            Case Convert.ToChar(Keys.Space)



                Label1.Text = "Space"







        End Select







    End Sub



End Class



      



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







vbnet enter key press





vbnet spacebar key press


















    















            

          

          

        

          

        













C# KeyChar, KeyCode








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How To Use Key Char And Key Code In C#

































C# Key Char & Key Code













In This C# Tutorial  We Will See How To Use KeyChar And KeyCode To Check Which Key Is Pressed ENTER or SPACE, SHIFT... In CSharp Programming Language And Visual  Studio Editor.













  
        
    
  

  


Project Source Code:











using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;



namespace WindowsFormsApplication1

{

    public partial class Csharp_keycode_keychar : Form

    {

        public Csharp_keycode_keychar()

        {

            InitializeComponent();

        }



// keycode

        private void Csharp_keycode_keychar_KeyDown(object sender, KeyEventArgs e)

        {



            if ((e.KeyCode == Keys.Enter) && e.Control)

                label1.Text = "CONTROL + ENTER";

            else

                label1.Text = "/////";



        }



// keychar

        private void Csharp_keycode_keychar_KeyPress(object sender, KeyPressEventArgs e)

        {

            

            if(e.KeyChar == (char)Keys.Space)

                label1.Text = "spacebar";

            else

                label1.Text = "/////";

           

        }

    }

}















// OUTPUT :



c# enter key keychar






























    



























Javascript - HTML Table Maximum Minimum Sum Average Value








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How To Get HTML Table Column Max, Min, Sum, Avg Value In Javascript  

























HTML Table Column Max, Min, Sum, Avg Value In Javascript

















In This Javascript Tutorial we will See How To Find The Maximum,  Minimum Value And Calculate The Sum And Average Value Of An HTML Table Column using JS And Netbeans Editor .















Project Source Code:











<!DOCTYPE html>







<html>



    <head>



        <title>Javascript HTML Table - Min Max Sum Avg</title>



        <meta charset="windows-1252">



        <meta name="viewport" content="width=device-width, initial-scale=1.0">



    </head>



    <body>



        



        <table id="table" border="1">



            <tr>



                <th>First Name</th>



                <th>Last Name</th>



                <th>Value</th>



            </tr>



            <tr>



                <td>A1</td>



                <td>B1</td>



                <td>43</td>



            </tr>



            <tr>



                <td>A2</td>



                <td>B2</td>



                <td>28</td>



            </tr>



            <tr>



                <td>A3</td>



                <td>B3</td>



                <td>15</td>



            </tr>



            <tr>



                <td>A4</td>



                <td>B4</td>



                <td>50</td>



            </tr>



            <tr>



                <td>A5</td>



                <td>B5</td>



                <td>31</td>



            </tr>



            <tr>



                <td>A6</td>



                <td>B6</td>



                <td>85</td>



            </tr>



            <tr>



                <td>A7</td>



                <td>B7</td>



                <td>18</td>



            </tr>



        </table>



        



        <span id="minV"></span><br>



        <span id="maxV"></span><br>



        <span id="sumV"></span><br>



        <span id="avgV"></span>



        



        <script>



            



            var table = document.getElementById("table"), sumVal = 0;







            getMin();



            getMax();



            getSum();



            getAvg();







           // get min value



            function getMin()



            {



              var minVal, minIndex;



              for(var i = 1; i < table.rows.length; i++){



                  if(i === 1){



                      minVal = table.rows[i].cells[2].innerHTML;



                      minIndex = table.rows[i].rowIndex;



                  }else if(minVal > table.rows[i].cells[2].innerHTML){



                      minVal = table.rows[i].cells[2].innerHTML;



                      minIndex = table.rows[i].rowIndex;



                  }



              }



              table.rows[minIndex].cells[2].style.background = "red";



              table.rows[minIndex].cells[2].style.color = "white";



              document.getElementById("minV").innerHTML = "Minimum Value = "+minVal;



              document.getElementById("minV").style.color = "red";



               console.log("Min => "+minVal);       



            }



            







            // get max value



            function getMax()



            {



              var maxVal, maxIndex;



              for(var i = 1; i < table.rows.length; i++){



                  if(i === 1){



                      maxVal = table.rows[i].cells[2].innerHTML;



                      maxIndex = table.rows[i].rowIndex;



                  }else if(maxVal < table.rows[i].cells[2].innerHTML){



                      maxVal = table.rows[i].cells[2].innerHTML;



                       maxIndex = table.rows[i].rowIndex;



                  }



              }



              table.rows[maxIndex].cells[2].style.background = "green";



              table.rows[maxIndex].cells[2].style.color = "white";



              document.getElementById("maxV").innerHTML = "Maximum Value = "+maxVal;



              document.getElementById("maxV").style.color = "green";



               console.log("Max => "+maxVal);       



            }



            



            // caculate total/sum value



            function getSum()



            {



              for(var i = 1; i < table.rows.length; i++){



                     sumVal = sumVal + parseInt(table.rows[i].cells[2].innerHTML);



              }



              document.getElementById("sumV").innerHTML = "Sum Value = "+sumVal;



               console.log("Sum => "+sumVal);       



            }



            



            // caculate avg value



            function getAvg()



            {



                var avg = sumVal / (table.rows.length - 1);// minus the header



                document.getElementById("avgV").innerHTML = "Average Value = "+parseInt(avg);



                console.log("Avg => "+parseInt(avg));



            }



            



        </script>



        



    </body>



</html>



















OUTPUT:





































Javascript Min Max Sum Avg Values
















  









  
    















        

      















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