BacaDataBos.java AWT

 import java.awt.*;  
 import java.awt.event.*;  
 import java.sql.*;  
 import javax.swing.*;  
 import javax.swing.table.*;  
 public class BacaDataBos extends JFrame{  
  Connection konek;  
  JScrollPane panelGulung = new JScrollPane();  
  JTable tabel = new JTable();  
  DefaultTableModel modeleTabel;  
  public BacaDataBos(){  
   super("Baca Data dari Database Server");  
   inisialisasiGUI();  
  }  
  public static void main (String args[]){  
    BacaDataBos data = new BacaDataBos();  
    data.setVisible(true);  
  }  
  public void inisialisasiGUI(){  
    int lebarJendela = 400;  
    int tinggiJendela = 450;  
    Dimension Layar = Toolkit.getDefaultToolkit().getScreenSize();  
    int awalJendX = (Layar.width-lebarJendela)/2;  
    int awalJendY = (Layar.height-tinggiJendela)/2;  
    setSize(lebarJendela,tinggiJendela);  
    setLocation(awalJendX,awalJendY);  
    setResizable(false);  
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
    this.setLayout(null);  
    JButton ambil = new JButton(" AMBIL ");  
    ambil.setLocation(110,180);  
    ambil.setSize(200,40);  
    add(ambil);  
    Object[] baris = {"Nim", "Nama", "Nomor HP"};  
    modeleTabel = new DefaultTableModel(null, baris);  
    panelGulung.setBounds(new Rectangle(15,225,365,175));  
    tabel.setModel(modeleTabel);  
    panelGulung.getViewport().add(tabel);  
    add(panelGulung);  
    ambil.addActionListener( new ActionListener(){  
     public void actionPerformed(ActionEvent e) {  
      aksitombol();  
     }  
    });  
    koneksiDatabase();  
    }  
   public void koneksiDatabase (){  
     String namadb = "pangkalan";  
     String usr  = "nanungnurzula";  
     String psw  = "masuksurga";  
     try{  
       Class.forName("org.postgresql.Driver");  
       System.out.println("Drivernya sudah ketemu.");  
       try{  
         konek = DriverManager.getConnection("jdbc:postgresql://localhost:5432/"+namadb, usr, psw);  
         /*getConnection("jdbc:postgresql://localhost:5432/pangkalan", "nanungnurzula", "masuksurga");*/  
         /*getConnection("jdbc:postgresql://127.0.0.1/pangkalan?user=nanungnurzula&password=masuksurga");*/  
         /*getConnection("jdbc:postgresql://localhost:5432/pangkalan?user=nanungnurzula&password=masuksurga"); */  
         System.out.println("Koneksi berhasil.");  
       }catch(SQLException sqle){  
        System.out.println(sqle);  
        System.out.println("Koneksi gagal.");  
        System.exit(0);  
     }  
    }catch(ClassNotFoundException cnfe){  
      System.out.println(cnfe);  
      System.out.println("Drivernya belum ketemu.");  
    }  
   }  
   public void aksitombol(){  
    hapusIsiTabelYangAda();  
    pindahkanTabeldiServerKeTabeldiLayar();  
   }  
   public void hapusIsiTabelYangAda(){  
    int jmlBaris = modeleTabel.getRowCount();  
    for (int i=0; i<jmlBaris; i++){  
     modeleTabel.removeRow(0);  
    }  
   }  
   public void pindahkanTabeldiServerKeTabeldiLayar(){  
    try {  
     String SQLe = "select * from databos";  
     Statement perintah = konek.createStatement();  
     ResultSet hasile = perintah.executeQuery(SQLe);  
     while (hasile.next()) {  
      String nime  = hasile.getString("nim");  
      String namane = hasile.getString("nama");  
      String nohpne = hasile.getString("nohp");  
      String[] dataYgDidapat = {nime,namane,nohpne};  
      modeleTabel.addRow(dataYgDidapat);  
     }  
    }catch( Exception e) {/* kalo salah dicuekin */}  
    }  
  }