MasukDataBos.java AWT

 import java.awt.*;  
 import java.awt.event.*;  
 import java.sql.*;  
 import javax.swing.*;  
 public class MasukDataBos extends JFrame{  
 JLabel lNim = new JLabel("NIM");  
 JLabel lNama = new JLabel("Nama");  
 JLabel lNohp = new JLabel("No HP");  
 JTextField tNim = new JTextField();  
 JTextField tNama = new JTextField();  
 JTextField tNohp = new JTextField();  
 Connection konek;  
 public MasukDataBos(){  
   super("Memasukan Data Bos-Bos");  
   inisialisasiGUI();  
 }  
 public static void main (String args[]){  
   MasukDataBos data = new MasukDataBos();  
   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);  
   lNim.setLocation(110,60);  
   lNim.setSize(60,25);  
   tNim.setLocation(160,60);  
   tNim.setSize(150,25);  
   lNama.setLocation(110,90);  
   lNama.setSize(60,25);  
   tNama.setLocation(160,90);  
   tNama.setSize(150,25);  
   lNohp.setLocation(110,120);  
   lNohp.setSize(60,25);  
   tNohp.setLocation(160,120);  
   tNohp.setSize(150,25);  
   JButton masuk = new JButton(" Masuk ");  
   masuk.setLocation(110,180);  
   masuk.setSize(200,40);  
   add(lNim);  
   add(tNim);  
   add(lNama);  
   add(tNama);  
   add(lNohp);  
   add(tNohp);  
   add(masuk);  
   masuk.addActionListener( new ActionListener(){  
     public void actionPerformed(ActionEvent e) {  
       aksitombol();  
     }  
   });  
   koneksiDatabase();  
 }  
 public void aksitombol(){  
   try{  
     String sql = "Insert Into databos values(?,?,?)";  
     PreparedStatement stat = konek.prepareStatement(sql);  
     try{  
       stat.setString(1,tNim.getText());  
       stat.setString(2,tNama.getText());  
       stat.setString(3,tNohp.getText());  
       stat.executeUpdate();  
       tNim.setText("");  
       tNama.setText("");  
       tNohp.setText("");  
     }catch(SQLException se){  
       System.out.println(se);  
     }  
   }catch(Exception e){  
   System.out.println(e);  
   }  
 }  
 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.");  
   }  
   }  
 }