contoh class java transaksi

contoh class


public class transaksi {
    
    public static void main(String[] args) {
   
    akuntansi myob = new akuntansi();
    myob.open ="file";
    myob.create ="company";
    myob.explore ="folder";
    myob.whatnew ="what";
    myob.exit ="close";
    
    System.out.println(myob.open);
    System.out.println(myob.create);
    System.out.println(myob.explore);
    System.out.println(myob.whatnew);
    System.out.println(myob.exit);
    }
}

contoh class java transaksi

class akuntansi {
String open;
String create;
String explore;
String whatnew;
String exit;
final String perusahaan = "perusahaan";

}

demikian contoh contoh class java transaksi

input output data

setalah kita belajar database ACCESS dan membuat ODBC. kita buat contoh input output database mahasiswa dengan membuat koneksi:

package koneksi;
import java.awt.HeadlessException;
import java.sql.*;
import javax.swing.*;
/**
*
* @author ttg
*/


public class koneksi {
void testKoneksi()
{
try
{
String dbname="jdbc:odbc:CobaDataBase"; // nama ODBC
// ingat-ingat, CobaDatabase adalah nama ODBC kita yang udah kitaatur sebelumnya
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            try (Connection con = DriverManager.getConnection(dbname,"admin","admin")) {
                JOptionPane.showMessageDialog(null, "Koneksi berhasil","Insert Data",JOptionPane.INFORMATION_MESSAGE);
            }
}
catch ( ClassNotFoundException | SQLException | HeadlessException e)
{
JOptionPane.showMessageDialog(null, "Eror: "+e,"Gagal",JOptionPane.WARNING_MESSAGE);
}
}
public static void main (String args[])
{
koneksi test = new koneksi();
test.testKoneksi();
System.exit(0);
}
}

kemudian untuk tampilannya menambahkan NEWFRAME

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package koneksi;

import java.beans.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;

/**
 *
 * @author USER
 */
public class NewJFrame extends javax.swing.JFrame {

    /**
     * Creates new form NewJFrame
     */
    public NewJFrame() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        txtnim = new javax.swing.JTextField();
        txtnama = new javax.swing.JTextField();
        txtalamat = new javax.swing.JTextField();
        btcari = new javax.swing.JButton();
        bttambah = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setText("NIM");

        jLabel2.setText("NAMA");

        jLabel3.setText("ALAMAT");

        btcari.setText("CARI");
        btcari.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                btcariMouseClicked(evt);
            }
        });
        btcari.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btcariActionPerformed(evt);
            }
        });

        bttambah.setText("TAMBAH");
        bttambah.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bttambahActionPerformed(evt);
            }
        });

        jButton3.setText("UBAH");
        jButton3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton3ActionPerformed(evt);
            }
        });

        jButton4.setText("HAPUS");
        jButton4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton4ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(31, 31, 31)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 47, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, 55, Short.MAX_VALUE))
                        .addGap(33, 33, 33)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(txtalamat, javax.swing.GroupLayout.PREFERRED_SIZE, 197, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                .addComponent(txtnama)
                                .addGroup(layout.createSequentialGroup()
                                    .addComponent(txtnim, javax.swing.GroupLayout.DEFAULT_SIZE, 90, Short.MAX_VALUE)
                                    .addGap(27, 27, 27)
                                    .addComponent(btcari)))))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(23, 23, 23)
                        .addComponent(bttambah)
                        .addGap(18, 18, 18)
                        .addComponent(jButton3)
                        .addGap(34, 34, 34)
                        .addComponent(jButton4)))
                .addContainerGap(84, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(42, 42, 42)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtnim, javax.swing.GroupLayout.PREFERRED_SIZE, 20, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btcari))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 27, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtnama, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtalamat, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(bttambah)
                    .addComponent(jButton3)
                    .addComponent(jButton4))
                .addContainerGap(112, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void bttambahActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bttambahActionPerformed
        // TODO add your handling code here:
        
String nim = txtnim.getText();
String nama = txtnama.getText();
String alamat = txtalamat.getText();
try
{
String dbname="jdbc:odbc:CobaDataBase";
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            try (Connection con = DriverManager.getConnection(dbname,"admin","admin")) {
                try (java.sql.Statement statement = con.createStatement()) {
                    String sql="insert into mahasiswa values('"+nim+"','"+nama+"','"+alamat+"');";
                    statement.executeUpdate(sql);
                }
                JOptionPane.showMessageDialog(null, "Data berhasildimasukkan..","Insert Data",JOptionPane.INFORMATION_MESSAGE);
            }
}
catch (Exception e)
{
JOptionPane.showMessageDialog(null, "Eror:"+e,"Gagal",JOptionPane.WARNING_MESSAGE);
//System.err.println("Exception: "+e.getMessage());
}
    }//GEN-LAST:event_bttambahActionPerformed

private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton4ActionPerformed
 // TODO add your handling code here:
    String nim = txtnim.getText();
    {
String dbname="jdbc:odbc:CobaDataBase";
            try {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            } catch (ClassNotFoundException ex) {
                Logger.getLogger(NewJFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
try (Connection con = DriverManager.getConnection(dbname,"admin","admin")) {
                try (java.sql.Statement statement = con.createStatement())
{String sql="DELETE FROM mahasiswa WHERE NIM LIKE '"+nim+"'";
statement.executeUpdate(sql);
statement.close();
txtnim.setText("");
txtnama.setText("");
txtalamat.setText("");}
JOptionPane.showMessageDialog(null, "Data berhasil dihapus..","InsertData",JOptionPane.INFORMATION_MESSAGE);
con.close();
} catch (Exception e) {
JOptionPane.showMessageDialog(null, "Eror:"+e,"Gagal",JOptionPane.WARNING_MESSAGE);
//System.err.println("Exception: "+e.getMessage());
}
}

}//GEN-LAST:event_jButton4ActionPerformed

    private void btcariActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btcariActionPerformed
        // TODO add your handling code here:
        String nim = txtnim.getText();
try
{
String dbname="jdbc:odbc:CobaDataBase";
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            try (Connection con = DriverManager.getConnection(dbname,"admin","admin")) {
                java.sql.Statement statement = con.createStatement();
                String sql="SELECT * FROM mahasiswa WHERE NIM like'"+nim+"'";
                ResultSet rs = statement.executeQuery(sql);
                if (rs.next())
                {
                txtnama.setText(rs.getString(2));
                txtalamat.setText(rs.getString(3));
                JOptionPane.showMessageDialog(null, "Data ditemukan","InsertData",JOptionPane.INFORMATION_MESSAGE);
                }
                else
                {
                JOptionPane.showMessageDialog(null, "Data tidak ditemukan ","InsertData",JOptionPane.INFORMATION_MESSAGE);
                }
            }
}
catch (Exception e)
{
JOptionPane.showMessageDialog(null, "Eror:"+e,"Gagal",JOptionPane.WARNING_MESSAGE);
//System.err.println("Exception: "+e.getMessage());
        
}
        
    }//GEN-LAST:event_btcariActionPerformed

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
        // TODO add your handling code here:
String nim = txtnim.getText();
String nama = txtnama.getText();
String alamat = txtalamat.getText();

try

{
    String dbname="jdbc:odbc:CobaDataBase";
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

               try (Connection con = DriverManager.getConnection(dbname,"admin","admin")) {
                try (java.sql.Statement statement = con.createStatement()){
                 String sql="UPDATE mahasiswa SET NAMA='"+nama+"', ALAMAT='"+alamat+"'WHERE NIM LIKE '"+nim+"'";

statement.executeUpdate(sql);
statement.close();}
JOptionPane.showMessageDialog(null, "Data berhasil diedit..","InsertData",JOptionPane.INFORMATION_MESSAGE);
con.close();
               }}


               

               catch (Exception e) {
JOptionPane.showMessageDialog(null, "Eror:"+e,"Gagal",JOptionPane.WARNING_MESSAGE);
//System.err.println("Exception: "+e.getMessage());
}

   
    }//GEN-LAST:event_jButton3ActionPerformed

    private void btcariMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_btcariMouseClicked

    }//GEN-LAST:event_btcariMouseClicked

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /*
         * Set the Nimbus look and feel
         */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /*
         * If Nimbus (introduced in Java SE 6) is not available, stay with the
         * default look and feel. For details see
         * http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /*
         * Create and display the form
         */
        java.awt.EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new NewJFrame().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton btcari;
    private javax.swing.JButton bttambah;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JTextField txtalamat;
    private javax.swing.JTextField txtnama;
    private javax.swing.JTextField txtnim;
    // End of variables declaration//GEN-END:variables

}

maka tampilannya:

input output data

PROGRAM PERHITUNGAN KUBUS PADA JAVA

PROGRAM PERHITUNGAN KUBUS PADA JAVA

Kubus merupakan bangun ruang tiga dimensi yang dibatasi oleh enam bidang sisi yang berbentuk bujur sangkar. Kubus memiliki 6 sisi, 12 rusuk dan 8 titik sudut. Beberapa perhitungan yang akan diimplementasikan di sini adalah perhitungan luas permukaan, keliling, dan volume kubus.

Sourcodenya dapat diimplementasikan sebagai berikut :
import javax.swing.*;
/**
*
* @author Goes Redy
*/
public class LuasKubus {
public static void main(String[] args) {
System.out.println("Program untuk perhitungan kubus :");
String sisi = "";
sisi = JOptionPane.showInputDialog("Masukkan panjang sisinya : ");
int s=Integer.parseInt(sisi);
System.out.println ("Panjang sisinya = "+(s));
System.out.println ("Kelilingnya = "+(12*s));
System.out.println ("Luas permukaannya = "+((s*s)*6));
System.out.println ("Volumenya = "+(s*s*s));
}
}

Penjelasan :
Seperti dapat dilihat di atas, kodenya juga hampir sama dengan kode – kode java sebelumnya pada kode pemanggilannya. tidak ada yang begitu menyulitkan dalam perhitungan kubus ini, karena kita hanya terpaut pada satu panjang sisi saja, jadi mudah sekali untuk menghitungnya.

Hasil :

PROGRAM PERHITUNGAN KUBUS PADA JAVA

PROGRAM LUAS PERSEGI DENGAN JAVA

PROGRAM LUAS PERSEGI DENGAN JAVA
Seperti artikel sebelumnya, saya akan memberikan bahasan tentang bagaimana pengimplementasi rumus matematika dalam java, yaitu membuat program penghitung luas persegi dengan java. Luas persegi tersebut, kita sama – sama tahu bagaimana rumusnya, yakni “s²“. Dalam java kita akan implementasikan rumus tersebut seperti source code di bawah ini :

/**
*
* @author Goes Redy
*/
public class LuasPersegi {
public static void main(String[] args) {
System.out.println("Program untuk menghitung luas persegi :");
String sisi = "";
sisi = JOptionPane.showInputDialog("Masukkan sisinya : ");
int s=Integer.parseInt(sisi);
System.out.println ("Sisinya = "+(s));
System.out.println ("Luasnya = "+(s*s));
}
}


Penjelasan :


Di sini terdapat import javax.swing.*; karena di bawahnya akan dilakukan proses permintaan data sisi = JOptionPane.showInputDialog("Masukkan sisinya : ");. Rumus matematikanya ada pada System.out.println ("Luasnya = "+(s*s));. Dalam java ditulis (s*s) karena s² tidak dikenal oleh java.


Hasil :

tampilan

PROGRAM LUAS PERSEGI DENGAN JAVA

TUTORIAL MENGHITUNG LUAS SEGITIGA

TUTORIAL MENGHITUNG LUAS SEGITIGA
Dalam tutorial kali ini akan saya jelaskan cara membuat Aplikasi Menghitung Luas Segitiga dengan menggunakan NetBeans. Untuk membuat project baru sudah saya jelaskan pada tutorial Membuat Konverter Suhu jadi tidak perlu saya jelaskan lagi. Setelah buat project baru, klik kanan pada Project yang telah dibuat lalu pilih New > JFrame Form. Kemudian buat design tampilan seperti berikut (tanpa nomer) :

tampilan

Kemudian ubah Variable Name-nya. Sesuaikan dengan nomer pada gambar di atas !


1. txtalas
2. txttinggi
3. hitung
4. txt hasil
5. reset


Selanjutnya masuk ke bagian Source Code.
dibawah code "public class LuasSegitiga extends javax.swing.JFrame{"
masukkan code seperti berikut :



Kemudian kembali lagi kebagian Design. Klik dua kali pada button Hitung, lalu masukkan code seperti berikut :




Selanjutnya kembali lagi ke bagian Design. Klik dua kali pada button RESET, lalu masukkan code seperti berikut :



Selesai. sekarang running aplikasinya dengan menekan tombol Shift+F6.

TUTORIAL MENGHITUNG LUAS LINGKARAN

TUTORIAL MENGHITUNG LUAS LINGKARAN

Pada posting kali ini saya akan men-tutorial kan cara - cara membuat program menghitung luas lingkaran dengan netbeans, ikutilah tahap - tahap berikut :
1. Buat Naskah

rumus lingkaran

2. Buat Flowchart

flowcard 

3. Buat Pseudocode

algoritma

4. Buat Codes







5. Buka netbeans - klik file - new project





6. pilih java aplication - klik next - isi nama bebas - klik finish









7. klik kanan pada project - pilih new - klik jframe












8. isi jframe dengan nama bebas - klik finish






9. ini dia coding luas lingkarannya






10. ini dia hasilnya