JPanels..

hye..i am new to netbeans UI..could u please help me with this

i'm using two panels in a frame.
the first panel is to calculate a dimension.


    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
// TODO add your handling code here:
        final double HEIGHT=0.75;
        final double LENGTH=0.35;
        final double WIDTH=0.35;
        final double FURN_DIM = HEIGHT*WIDTH*LENGTH;
        
        double furn_needed,d;
        //d = room dimension

** i need to call the room dimension here in order to proceed to next
function.
        
        
    }                                        

    private void exitActionPerformed(java.awt.event.ActionEvent evt) {                                     
// TODO add your handling code here:
        System.exit(0);
    }                                    

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
// TODO add your handling code here:
        height.setText(" ");
        length.setText(" ");
        width.setText(" ");
        
    }                                        

    private void calcActionPerformed(java.awt.event.ActionEvent evt) {                                     
// TODO add your handling code here:
        
     double h,w,l,d;
     
    if (height.getText() != " " && width.getText()!=" " &&
width.getText()!=" ")    
        {
    
          
            h = Double.parseDouble(height.getText());
            w = Double.parseDouble(width.getText());
            l = Double.parseDouble(length.getText());
            
            d = h*w*l;

           ++The room dimension is here 


            dimension.setText(String.valueOf(d));
         }
    else JOptionPane.showMessageDialog(null,"room dimension","Please enter
room hieght,length and width in metre",JOptionPane.WARNING_MESSAGE);

    }                                    
    
   thank u in advanced.
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