NetBeans 10

Tips:

For checking Condition use if

For using choice use Switch()

For repeated loop use for,while or do while

lesson 9

private void txtsStateChanged(javax.swing.event.ChangeEvent evt) {                                  

int c = txts.getValue();

txtc.setText(""+c+"CELCIUS");

int f = ((c*9)/5)+32;

txtf.setText(""+f+"FAHRENHEIT");

    }

netbeans lesson 8

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                        

System.exit(0);

    }                                       

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                        

 txtcn.setText(" ");

 txtp.setText(" ");

 txtt.setText(" ");

 txtr.setText(" ");

 txtsi.setText(" ");

 txtta.setText(" ");

    }                                       

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

String cn = txtcn.getText();

int p = Integer.parseInt(txtp.getText());

int t = Integer.parseInt(txtt.getText());

int r = Integer.parseInt(txtr.getText());

double s,ta ;

s = (p * r * t)/100 ;

ta = ( p+s) ;

txtsi.setText(" "+s);

txtta.setText(" "+ta);

    }                                       

    /**

    * @param args the command line arguments

    */

    public static void main(String args[]) {

        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {

                new SI().setVisible(true);

            }

        });

    }