Persentase Yang Bisa Memasukan Nilai Tanpa 0 Koma

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package latihan30;

import java.text.DecimalFormat;

import javax.swing.SwingUtilities;

import javax.swing.JTable;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.ResultSetMetaData;

import java.sql.Statement;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.swing.table.DefaultTableModel;

import java.sql.*;

import java.util.Locale;

import java.util.Vector;

import java.awt.event.*;

import java.awt.Event;

import java.awt.*;

import java.util.Locale.Builder;


/**
 *
 * @author steven
 */
public class Persen5 extends javax.swing.JFrame {

    /**
     * Creates new form Persen5
     */
    public Persen5() {
        initComponents();

        /**
         * Source code di bawah ini untuk menampilkan isi tabel database
         *
         * ketika aplikasi pertama kali dijalankan
         */


        Connection koneksi = null;

        Statement stmt = null;

        String query = "SELECT id,persentase FROM persen";

        String url = "jdbc:postgresql://localhost:5432/pdam";

        String user = "steven";

        String password = "kucing";

        try{

            koneksi = DriverManager.getConnection(url,user,password);

            stmt = koneksi.createStatement();

            ResultSet rs = stmt.executeQuery(query);

            ResultSetMetaData rsmd = rs.getMetaData();


            Vector<Vector> coba2 = new Vector<Vector>();

            while(rs.next()){

            Double persentase3 = rs.getDouble("persentase");

            DecimalFormat persenFormat = new DecimalFormat("#%");

            String persentase4 = persenFormat.format(persentase3);


            Vector<String> isiBaris = new Vector<String>();

            isiBaris.add(rs.getString("id"));

            isiBaris.add(persentase4);


            coba2.add(isiBaris);

            Vector<String>namaKolom = new Vector<String>();

            namaKolom.add(rsmd.getColumnLabel(1));

            namaKolom.add(rsmd.getColumnLabel(2));


            DefaultTableModel tabel1 = new DefaultTableModel(coba2,namaKolom);

            jTable1.setModel(tabel1);

            koneksi.close();

            jTextField2.setText("");

            }


        }catch(SQLException ex){

            ex.printStackTrace();


        }

    }

    /**
     * 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">
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jButton1 = new javax.swing.JButton();
        jLabel2 = new javax.swing.JLabel();
        jTextField2 = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setFont(new java.awt.Font("Noto Sans", 1, 15)); // NOI18N
        jLabel1.setText("Input Persen");

        jTextField1.setFont(new java.awt.Font("Noto Sans", 1, 15)); // NOI18N

        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            },
            new String [] {
                "Title 1", "Title 2", "Title 3", "Title 4"
            }
        ));
        jScrollPane1.setViewportView(jTable1);

        jButton1.setFont(new java.awt.Font("Noto Sans", 1, 15)); // NOI18N
        jButton1.setText("Simpan");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel2.setFont(new java.awt.Font("Noto Sans", 1, 15)); // NOI18N
        jLabel2.setText("ID");

        jTextField2.setFont(new java.awt.Font("Noto Sans", 1, 15)); // NOI18N
        jTextField2.setToolTipText("");
        jTextField2.setEnabled(false);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                                .addComponent(jLabel1)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel2)
                                .addGap(93, 93, 93)))
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 330, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 330, javax.swing.GroupLayout.PREFERRED_SIZE))))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(55, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(jLabel2)
                        .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(46, 46, 46)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 205, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:

        /**
         * Source code dibawah ini untuk menginput data dan menampilkan data persen
         */

        String persentase = jTextField1.getText();

        Double persentase2 = Double.valueOf(persentase);

        Double persentase3 = persentase2/100;

        Connection koneksi = null;

        Statement stmt = null;

        PreparedStatement PSInsert = null;


        String query = "SELECT id,persentase FROM persen";

        String masukanData = "INSERT INTO persen" + "(persentase)VALUES" + "(?)";

        String url = "jdbc:postgresql://localhost:5432/pdam";

        String user = "steven";

        String password = "kucing";


        try{

            koneksi = DriverManager.getConnection(url,user,password);

            PSInsert = koneksi.prepareStatement(masukanData);

            // PSInsert.setString(1, persentase);

            PSInsert.setDouble(1, persentase3);


            PSInsert.executeUpdate();

            stmt = koneksi.createStatement();

            ResultSet rs = stmt.executeQuery(query);

            ResultSetMetaData rsmd = rs.getMetaData();


            Vector<Vector> coba2 = new Vector<Vector>();

            while(rs.next()){


            Double persentase4 = rs.getDouble("persentase");

            DecimalFormat persenFormat = new DecimalFormat("#%");

            String persentase5 = persenFormat.format(persentase4);


            Vector<String> isiBaris = new Vector<String>();

            isiBaris.add(rs.getString("id"));

            isiBaris.add(persentase5);


            coba2.add(isiBaris);

            Vector<String> namaKolom = new Vector<String>();

            namaKolom.add(rsmd.getColumnLabel(1));

            namaKolom.add(rsmd.getColumnLabel(2));


            DefaultTableModel tabel1 = new DefaultTableModel(coba2, namaKolom);

            jTable1.setModel(tabel1);

            koneksi.close();


            jTextField1.setText("");


            }


        } catch(SQLException ex){

    ex.printStackTrace();

        }

    }

    /**
     * @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(Persen5.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Persen5.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Persen5.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Persen5.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Persen5().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    // End of variables declaration
}