[Grom]

Hello!

380 K is huge?
I am creating a calculator, and I need TextFields to input numbers to calculate.
If, by mistake or deliberately, user should type a letter or anything but numbers, the textField should 'clear' itself. Not set invisible, just clear the textField.

here is the picture:

http: //shrani.si/f/a/mT/4hydyIgw/screenshot-truscalcpath-.png


ok, here is the main code:

Code:

//    Here I call my Truss Class, so I can use it 
    // through the whole program
    Truss2Class Truss = new Truss2Class();


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

      try
    {
        
         VnosV_class();
        // double a = Double(String WeightTextField.getText());
         
         // I display Truss Class content
         TrussClassNameLabel.setText(Truss.T_name());
         TrussClassWeightLabel.setText(String.valueOf(Truss.T_weight()));
         TrussClassLengthLabel.setText(String.valueOf(Truss.T_length()));
         TrussClassSpanLabel.setText(String.valueOf(Truss.T_span()));
         TrussClassLeftEndLabel.setText(String.valueOf(Truss.T_leftEnd()));
         TrussClassRightEndLabel.setText(String.valueOf(Truss.T_rightEnd()));
         jTextArea1.append(String.valueOf(Truss.T_weight())); // now, this is NOT adding text into next line...
         jTextArea1.append(String.valueOf(Truss.T_length())); // I need to be added in next line.
         jTextArea1.append(String.valueOf(Truss.T_span()));
         jTextArea1.append(String.valueOf(Truss.T_leftEnd()));
         jTextArea1.append(String.valueOf(Truss.T_rightEnd()));
         
         
    }
    catch (Exception e)  {
        
    }    
}                                        

                                       
private void VnosV_class () { 
    
    // Here I try to check if input is correct (one string, rest should be double)
    try {
        
        Truss.setT_name(NameTextField.getText());
        Truss.setT_weight(Vejica.StringToDouble(WeightTextField.getText())); // I call Vejica Class
        Truss.setT_length(Vejica.StringToDouble(LengthTextField.getText())); // to set it in right decimal character
        Truss.setT_span(Vejica.StringToDouble(SpanTextField.getText()));
        Truss.setT_leftEnd(Vejica.StringToDouble(LeftEndTextField.getText()));
        Truss.setT_rightEnd( Vejica.StringToDouble(LengthTextField.getText()) - Vejica.StringToDouble(SpanTextField.getText()) - Vejica.StringToDouble(LeftEndTextField.getText()) );
    } 
    
    catch (Exception e) { //  in case something goes wrong:
        Truss.setT_name("");
        Truss.setT_weight(0);
        Truss.setT_length(0);
        Truss.setT_span(0);
        Truss.setT_leftEnd(0);
        Truss.setT_rightEnd(0);        
    }   
    
}

private void WeightTextFieldCaretUpdate(javax.swing.event.CaretEvent evt) {      
    try { 
        String number = WeightTextField.getText();  
        Vejica.StringToDouble(number);
        WeightLabel.setText(String.valueOf(number) + " Weight");        
        //WeightTextField.setInputVerifier(arg0);
        
    }
    catch (Exception e) {
        WeightTextField.setText("");
    } 
}                                                                               
                                              

private void LengthTextFieldCaretUpdate(javax.swing.event.CaretEvent evt) {   

      try {
        String number = LengthTextField.getText();
        Vejica.StringToDouble(number);
        LengthLabel.setText(String.valueOf(number) + " Length");
    }
    catch (Exception e) {
        LengthTextField.setText("");
    }
    
}                                           

private void SpanTextFieldCaretUpdate(javax.swing.event.CaretEvent evt) {      

      try {
        String number = SpanTextField.getText();
        Vejica.StringToDouble(number);
        double num = Double.parseDouble(number);
        
         String biger = LengthTextField.getText();
        Vejica.StringToDouble(biger);
        double big = Double.parseDouble(biger);
        
        if ( num >  big ) {
            SpanTextField.setText("");
            SpanLabel.setText("Span");
        }
        else {
            SpanLabel.setText( (big - num) + " Span" );
        }
        
        
        
    }
    catch (Exception e) {
        SpanTextField.setText("");
    }
}                                         

private void LeftEndTextFieldCaretUpdate(javax.swing.event.CaretEvent evt) {

     try {
        String number = LeftEndTextField.getText();
        Vejica.StringToDouble(number);
        LeftEndLabel.setText(String.valueOf(number) + " Left End");
        
    }
    catch (Exception e) {
        LeftEndTextField.setText("");
    }
    
}

Here is Vejica Class, that I use to check for input (string to double)

Code:

public class Vejica {
        
        public static double StringToDouble(String stringNum) {
             
            String decimalCharacter = "."; 
//            string decimalCharacter = System.Globalization.CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;


/**
 *This class I made in order to 'transform/translste' 
 * string to double. I replace whatever (well just comma and fullstop) 
 * decimal separator with fullstop(.) .
 * I have in C# this code:
 * string decimalCharacter = System.Globalization.CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
            
*/

            stringNum = stringNum.replace(".", decimalCharacter);
            stringNum = stringNum.replace(",", decimalCharacter);
           
                return Double.parseDouble(stringNum);
         
            
        }
}

And here is my Truss Class, where I store the input

Code:

public class Truss2Class {

    
 /**
 *Here are stored 
  * calculation data
 *(operants)
 */ 
    private String NameTruss;
    private double WeightTruss;
    private double LengthTruss;
    private double SpanTruss;
    private double LeftEndTruss;
    private double RightEndTruss;
    
    
    //here I can get my calculation operants
    public String T_name() {
        return NameTruss;
    }
    public double T_weight() {
        return WeightTruss;
    }
    public double T_length() {
        return LengthTruss;
    }
    public double T_span() {
        return SpanTruss;
    }
    public double T_leftEnd() {
        return LeftEndTruss;
    }
    public double T_rightEnd() {
        return RightEndTruss;
    }
    
    //here I can set new value 
    //of my operants
    public void setT_name(String name) {
        NameTruss = name;
    }
    public void setT_weight(double weight) {
        WeightTruss = weight;
    }
    public void setT_length(double length) {
        LengthTruss = length;
    }
    public void setT_span(double span) {
        SpanTruss = span;
    }
    public void setT_leftEnd(double leftEnd) {
        LeftEndTruss = leftEnd;
    }
    public void setT_rightEnd( double rightEnd) {
        RightEndTruss = rightEnd;
    }
}

Hope you could help me now...

Kind regards, Grom