LISTING (PENGGUNAAN KOMPONEN DASAR)

LISTING (PENGGUNAAN KOMPONEN DASAR) 

PEMROGRAMAN DEKSTOP

 

       PRAKTEK PERTAMA

public class FHitung extends javax.swing.JFrame {

    /** Creates new form FHitung */

    public FHitung() {

        initComponents();

    }

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

        // TODO add your handling code here:

        float jumlah= Float.parseFloat(txtHarga.getText()) *

                Float.parseFloat(txtQty.getText());

        TOTAL.setText(Float.toString(jumlah));

        DecimalFormat angka= new DecimalFormat("###,###");

        TOTAL.setText("TOTAL: Rp."+angka.format(jumlah));

    }

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

        // TODO add your handling code here:

        JOptionPane.showMessageDialog(this,

                "Terima Kasih Sudah Membeli "+ txtBarang.getText());

        System.exit(0);

    }

HASIL OUPUT :

Ø  PRAKTEK KEDUA

package Tugas1;

/**

 *

 * @author Student

 */

public class FromTugas extends javax.swing.JFrame {

    /** Creates new form FromTugas */

    public FromTugas() {

        initComponents();

    }

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

        // TODO add your handling code here:

        try

        {

        float hasil =Float.parseFloat (txtB.getText())*Float.parseFloat (txtB.getText())-

                Float.parseFloat (txtA.getText())*Float.parseFloat (txtC.getText());

        lblA.setText(""+ hasil);

        if (hasil== 0)

        {

            lblB.setText("Akar Kembar");

        }

         if (hasil > 0)

        {

            lblB.setText("Akar X1, X2");

        }

         if (hasil < 0)

        {

            lblB.setText("Akar Imajiner");

        }

        }

        catch (Exception ex)

        {

        JOptionPane.showMessageDialog(this," Salah Masukan Input");

        }

    }

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

        // TODO add your handling code here:

        System.exit(0);

    }

HASIL OUPUT :

*) Jika Input Benar

*) Jiuka Salah