import java.awt.*; 
import java.awt.event.*; 
public class x implements ActionListener { 
  public static void main(String[] args) { 
    Frame s = new Frame("Screen"); 
    s.setSize(150,150);    
    s.setVisible(true);   
    s.addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent we){
        System.exit(0);
      }
    });
  } 
  // actionPerformed is abstract so it must be declared here
  public void actionPerformed(ActionEvent a) { } 
}

import java.awt.*; 
import java.awt.event.*; 
public class x implements ActionListener { 
  static Button bclose = new Button("Exit"); 
  public static void main(String[] args) { 
    Frame s = new Frame("Screen"); 
    s.setSize(150,150); 
    s.setLayout(null);
    s.setVisible(true);   
    s.setBackground(new Color(0, 255, 0)); 
    bclose.setBounds(10,40,70,20); 
    s.add(bclose); 
    x myx = new x();
    bclose.addActionListener(myx); 
  } 
  public void actionPerformed(ActionEvent a) { 
    System.out.println(a.getSource() + "1");  
    // output : java.awt.Button[button0,10,40,70x20,label=Exit]
    System.out.println(bclose + "2");
    if(a.getSource()==bclose) { System.exit(0); } 
  } 
}

import java.awt.*; 
import java.awt.event.*; 
public class x implements ActionListener { 
  static Button b1 = new Button("Exit"); 
  Button b2 = new Button("Hello");
  public static void main(String[] args) { 
    Button b3 = new Button("World");
    Frame s = new Frame("Screen"); 
    s.setSize(150,150); 
    s.setLayout(null); 
    s.setVisible(true); 
    s.setBackground(new Color(0, 255, 0)); 
    x myx = new x();
    b1.setBounds(10,40,70,20); 
    s.add(b1); 
    myx.b2.setBounds(10,70,70,20); 
    s.add(myx.b2); 
    b3.setBounds(10,100,70,20); 
    s.add(b3); 
    b1.addActionListener(myx); 
    myx.b2.addActionListener(myx); 
    b3.addActionListener(myx);
  } 
  public void actionPerformed(ActionEvent a) { 
    System.exit(0); 
  } 
}

2.3 button & image

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*;
public class x implements ActionListener { 
  JFrame s = new JFrame("Screen"); 
  JButton b1 = new JButton(new ImageIcon("right.gif"));
  JButton b2 = new JButton();
  Image im = Toolkit.getDefaultToolkit().getImage("right.png");
  public static void main(String[] args) { 
   new x().init(); 
  } 
  public void init( ) { 
    s.setSize(200,300); // height, width
    s.setLayout(null); 
    s.setVisible(true); 
    s.setIconImage(im);
    s.setBackground(Color.yellow); 	
    b1.setBounds(4,30,70,20); // 30 is top, 4 is right
    s.add(b1); 
    b1.addActionListener(this); 
    b2.setBounds(14,60,100,100); 
    s.add(b2); 
    b2.addActionListener(this); 
    s.addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent we){
        System.exit(0);
      }
    });
  } 
  public void actionPerformed(ActionEvent a) { 
    b1.setIcon(new ImageIcon("burin.jpg")); 
    b2.setIcon(new ImageIcon("burin.jpg")); // .jpg .png .gif
  } 
}

import java.awt.*; 
import java.awt.event.*; 
public class x implements ActionListener { 
  Frame s = new Frame("Screen"); 
  Button bclose = new Button("Exit"); 
  public static void main(String[] args) { 
    new x().init(); 
  } 
  public void init( ) { 
    s.setSize(150,150); 
    s.setLayout(null);    // ถ้าไม่มี setLayout และ setVisible จะกลายเป็นปุ่มเต็มจอ
    s.setVisible(true);   
    s.setBackground(Color.yellow); 
    bclose.setBounds(10,40,70,20); 
    s.add(bclose); 
    bclose.addActionListener(this); 
  } 
  public void actionPerformed(ActionEvent a) { 
    if(a.getSource()==bclose) { System.exit(0); } 
  } 
}

import java.awt.*; 
import java.awt.event.*; 
public class x implements ActionListener { 
  Frame s = new Frame("Screen"); 
  TextField txt = new TextField(20);
  public static void main(String[] args) { 
    new x().burin(); 
  } 
  public void burin( ) { 
    s.setSize(150,150); 
    s.setLayout(null);    
    s.setVisible(true);   
    txt.setBounds(10,30,100,20);
    txt.setText("ข้อมูล");
    s.add(txt);
    s.addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent we){
        System.exit(0);
      }
    });
  } 
  public void actionPerformed(ActionEvent a) { } 
}

import java.awt.*; 
import java.awt.event.*; 
public class x implements ActionListener { 
  Frame s = new Frame("Screen"); 
  Button bclose = new Button("Exit"); 
  Button badd = new Button("Add"); 
  TextField txt = new TextField(10); 
  public static void main(String[] args) { 
    new x().init(); 
  } 
  public void init( ) { 
    s.setSize(150,150); 
    s.setLayout(null); 
    s.setVisible(true); 
    s.setBackground(Color.yellow); 
    txt.setBounds(10,40,70,20); 
    badd.setBounds(10,70,70,20); 
    bclose.setBounds(10,100,70,20); 
    s.add(txt); 
    s.add(badd); 
    s.add(bclose); 
    badd.addActionListener(this); 
    bclose.addActionListener(this); 
    txt.setText("0"); 
  } 
  public void actionPerformed(ActionEvent a) { 
  String aa= Double.toString(Double.parseDouble(txt.getText())+5); 
  //String aa= Integer.toString(Integer.parseInt(txt.getText()) +5); 
  if(a.getSource()==badd) { txt.setText(aa); } 
  if(a.getSource()==bclose) { System.exit(0); } 
  } 
}

import java.awt.*; 
import java.awt.event.*; 
public class x implements ActionListener { 
  Frame s = new Frame("Screen"); 
  Button b1 = new Button("Add"); 
  Button b2 = new Button("Welcome"); 
  TextField txt = new TextField(10); 
  String tmp;
  public static void main(String[] args) { new x().init(); } 
  public void init( ) { 
    s.setSize(150,150); 
    s.setLayout(null); 
    s.setVisible(true); 
    s.setBackground(Color.yellow); 
    txt.setBounds(10,40,70,20); 
    b1.setBounds(10,70,70,20); 
    b2.setBounds(10,100,90,30); 
    s.add(txt); 
    s.add(b1); 
    s.add(b2);
    b1.addActionListener(this); 
    txt.setText("0"); 
    s.addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent we){
        System.exit(0);
      }
    });
  } 
  public void actionPerformed(ActionEvent a) { 
  String aa= Integer.toString(Integer.parseInt(txt.getText()) + 1); 
  if(a.getSource()==b1) { 
    txt.setText(aa); 
    b1.setLabel(aa); 
    tmp = b1.getLabel(); 
    b2.setLabel(tmp); 
  } 
  if(tmp.equals("2")) b2.setEnabled(false);  
  } 
}

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*;
public class x implements ActionListener { 
  Frame s = new Frame("Screen"); 
  Button b = new Button("Add"); 
  TextField txt = new TextField(10); 
  JButton br = new JButton(new ImageIcon("right.gif"));
  JLabel jl = new JLabel("wow", new ImageIcon("right.gif"), JLabel.RIGHT);
  JCheckBox jc = new JCheckBox("checkbox");
  JRadioButton jr = new JRadioButton("radio");
  public static void main(String[] args) { new x().init(); } 
  public void init( ) { 
    s.setSize(200,300); // height, width
    s.setLayout(null); 
    s.setVisible(true); 
    s.setBackground(Color.yellow); 
    txt.setBounds(10,40,180,20); // left,top,width,height
    b.setBounds(10,70,70,20); 
    br.setBounds(10,100,70,20); 
    jl.setBounds(10,130,70,20); 
    jc.setBounds(10,160,70,20); 
    jc.setSelected(true);
    jr.setBounds(10,190,70,20); 
    jr.setSelected(true);
    s.add(txt); 
    s.add(b); 
    s.add(br); 
    s.add(jl); 
    s.add(jc); 
    s.add(jr); 
    b.addActionListener(this); 
    txt.setText("0"); 
    s.addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent we){
        System.exit(0);
      }
    });
  } 
  public void actionPerformed(ActionEvent a) { 
  if(a.getSource()==b) { txt.setText(b.getLabel() + jc.isSelected() + jr.isSelected()); }
  } 
}

import java.awt.*; 
import java.awt.event.*; 
public class x implements ActionListener { 
  Frame s1 = new Frame("Screen1"); 
  Frame s2 = new Frame("Screen2"); 
  Button bclose = new Button("Exit"); 
  Button bshow2 = new Button("show2"); 
  public static void main(String[] args) { 
    new x().init(); 
  } 
  public void init( ) { 
    s1.setSize(150,150); 
    s1.setLayout(null); 
    s1.setBackground(Color.yellow); 
    s2.setSize(150,150); 
    s2.setLayout(null); 
    s2.setBackground(Color.green); 
    bshow2.setBounds(10,70,70,20); 
    bclose.setBounds(10,100,70,20); 
    s1.add(bshow2); 
    s1.add(bclose); 
    bshow2.addActionListener(this); 
    bclose.addActionListener(this); 
    s1.setVisible(true);
  } 
  public void actionPerformed(ActionEvent a) { 
    if(a.getSource()==bshow2) { 
       s1.setVisible(false); 
       s2.add(bclose); 
       bclose.addActionListener(this); 
       s2.setVisible(true);
    } 
    if(a.getSource()==bclose) System.exit(0);
  } 
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;  
public class x implements ActionListener{
Frame f = new Frame("JTable");
public static void main(String args[]) {
new x().init();
}
void init() {
f.setSize(700,400);   
f.setLocation(80,50); 
f.setLayout(null);
f.setResizable(true);
f.setBackground(Color.pink);
showJtable(); // it should be before setVisible
f.setVisible(true);
}
public void actionPerformed(ActionEvent a) { } 
public void showJtable() {
String TableHeader[] = {"no","name"};
String TableArr[][]=new String[50][2]; // row=6,column=2
try {
TableArr[0][0]=Integer.toString(1); // row=0 column=0
TableArr[1][0]=Integer.toString(2); // row=1 column=0
TableArr[0][1]="jack"; // row=0 column=1
TableArr[1][1]="jojo"; // row=1 column=1
JTable TitleTable;
JScrollPane DataInTable;
TitleTable = new JTable(TableArr,TableHeader);  
TitleTable.setVisible(true);
TitleTable.setEnabled(false);
DataInTable = new JScrollPane(TitleTable);
DataInTable.setBounds(5,50,600,200); // left, top,width,height
f.add(DataInTable);	
} catch (Exception e){ System.err.println(e); }
}
} 

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;  
import javax.swing.event.*;
public class y implements ActionListener{
 Frame f = new Frame("JTable");
JTable TitleTable;
TextField txt = new TextField(10); 
public static void main(String args[]) {
  new y().init();
}
void init() {
  f.setSize(700,400);   
  f.setLocation(80,50); 
  f.setLayout(null);
  f.setBackground(Color.pink);
  txt.setBounds(1,40,70,20);
  f.add(txt); 
  showJtable(); // it should be before setVisible
  f.setVisible(true);
}
public void actionPerformed(ActionEvent a) {  } 
public void showJtable() {
String TableHeader[] = {"no","name"}; // not show in header
String TableArr[][]=new String[3][2]; // row=6,column=2
try {
TableArr[0][0]=Integer.toString(1); // row=0 column=0
TableArr[1][0]=Integer.toString(2); // row=1 column=0
TableArr[0][1]=ThaiUtil.ASCII2Unicode("ที่นี่"); // row=0 column=1
TableArr[1][1]=ThaiUtil.ASCII2Unicode("ดูนี่"); // row=1 column=1
TitleTable = new JTable(TableArr,TableHeader);  
TitleTable.setVisible(true);
TitleTable.setEnabled(true); // true = can change
TitleTable.setBounds(5,80,600,300); 
f.add(TitleTable);
TitleTable.getSelectionModel().addListSelectionListener(
  new ListSelectionListener() {
  public void valueChanged(ListSelectionEvent e) {
    if (!e.getValueIsAdjusting()) {
      System.out.println(TitleTable.getSelectedRow());
      System.out.println(TitleTable.getSelectedColumn());
      System.out.println(TitleTable.getModel().getValueAt(0, 1));
      txt.setText(Integer.toString(TitleTable.getSelectedRow())); 
    }
  }
});
} catch (Exception e){ System.err.println(e); }
}
} 

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
//  @see http://stackoverflow.com/q/12301923/230513
public class z extends JPanel {
    private static final String SHOW = "Show";
    private DefaultTableModel model = new DefaultTableModel();
    private JTable table = new JTable(model);
    private JButton button = new JButton(new AbstractAction(SHOW) {
        public void actionPerformed(ActionEvent e) {
            System.out.println(table.getSelectedRow());
        }
    });
    public z() {
        model.addColumn("Column");
        for (int i = 0; i < 16; i++) { model.addRow(new Object[]{i}); }
        table.setPreferredScrollableViewportSize(new Dimension(160, 100));
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        table.getSelectionModel().addListSelectionListener(
            new ListSelectionListener() {
            public void valueChanged(ListSelectionEvent e) {
                if (!e.getValueIsAdjusting()) {
                    button.setText(SHOW + " " + table.getSelectedRow());
                }
            }
        });
        this.add(new JScrollPane(table));
        table.setRowSelectionInterval(3, 3);
    }
    private void display() {
        JFrame f = new JFrame("TableSelection");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(this, BorderLayout.CENTER);
        f.add(button, BorderLayout.SOUTH);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                new z().display();
            }
        });
    }
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class x extends JFrame {
JFrame frame;
JPanel p;
JButton b1,b2,b3,b4,b5,b6;
  public static void main(String[] args) { new x();}
  public x() {
    frame = new JFrame("test");
    p = new JPanel();
    p.setLayout(new GridLayout(3,2)); // row, column
    b1 = new JButton("one");
    b2 = new JButton("two");
    b3 = new JButton("three");
    b4 = new JButton("four");
    b5 = new JButton("five");
    b6 = new JButton("six");
    GridBagConstraints gc = new GridBagConstraints();
    gc.fill = GridBagConstraints.HORIZONTAL;
    p.add(b1, gc);
    p.add(b2, gc);
    p.add(b3, gc);
    p.add(b4, gc);
    p.add(b5, gc);
    p.add(b6, gc);
    frame.add(p, BorderLayout.NORTH);
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(500, 200);
    frame.setVisible(true);
}
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class x extends JFrame {
JFrame frame;
JPanel p1,p2,p3;
JLabel l1,l2;
JTextArea t1;
JTextField t2;
JButton b1;
  public static void main(String[] args) { new x();}
  public x() {
    frame = new JFrame("test");
    p1 = new JPanel();
    p1.setLayout(new GridLayout());
    p2 = new JPanel();
    p2.setLayout(new GridLayout());
    p3 = new JPanel();
    p3.setLayout(new GridLayout());
    l1 = new JLabel("test of panel");
    t1 = new JTextArea(10,10);
    t1.setText("ทดสอบ");
    l2 = new JLabel("Message");
    t2 = new JTextField(10);
    t2.setText("ทดลอง");
    b1 = new JButton("Send");
    GridBagConstraints gc = new GridBagConstraints();
    gc.fill = GridBagConstraints.HORIZONTAL;
    p1.add(l1, gc);
    p2.add(l2, gc);
    p2.add(t1, gc);
    p3.add(t2, gc);
    p3.add(b1, gc);
    b1.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ev){
        t1.setText(t2.getText());
      }
    });
    frame.add(p1, BorderLayout.NORTH);
    frame.add(p2, BorderLayout.CENTER);
    frame.add(p3, BorderLayout.SOUTH);
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(500, 500);
    frame.setVisible(true);
}
}

11.3 calculator in panel - โปรแกรมนี้ใช้ได้ โดยกด 1,2,+,2,1,=

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class x extends JFrame implements ActionListener {
JFrame frame;
JPanel p,p2;
JButton b1,b2,b3,b4,b5,b6;
JTextField t = new JTextField(10);
String tmp = "";
  public static void main(String[] args) { new x().init();}
  public void init() {
    frame = new JFrame("test");
    p = new JPanel();
    p2 = new JPanel();
    p.setLayout(new GridLayout(3,2)); // row, column
    b1 = new JButton("1");
    b2 = new JButton("2");
    b3 = new JButton("3");
    b4 = new JButton("4");
    b5 = new JButton("+");
    b6 = new JButton("=");
    GridBagConstraints gc = new GridBagConstraints();
    gc.fill = GridBagConstraints.HORIZONTAL;
    p.add(b1, gc);
    p.add(b2, gc);
    p.add(b3, gc);
    p.add(b4, gc);
    p.add(b5, gc);
    p.add(b6, gc);
    t.setText("");
    p2.add(t, gc);
    frame.add(p, BorderLayout.NORTH);
    frame.add(p2, BorderLayout.SOUTH);
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(500, 200);
    frame.setVisible(true);
    b1.addActionListener(this); 
    b2.addActionListener(this); 
    b5.addActionListener(this); 
    b6.addActionListener(this); 
  }
  public void actionPerformed(ActionEvent a) { 
    JButton o = new JButton("");
    o = (JButton)(a.getSource());
    if(a.getSource()==b1) { t.setText(t.getText() + o.getText()); }
    if(a.getSource()==b2) { t.setText(t.getText() + o.getText()); }
    if(a.getSource()==b5) {
      tmp = t.getText();
      t.setText("");
      b3.setEnabled(false);
      b4.setEnabled(false);
    }
    if(a.getSource()==b6) {
      t.setText(Double.toString(Double.parseDouble(tmp) + Double.parseDouble(t.getText())));
    }
  } 
}

public class ThaiUtil { 
    /* Creates a new instance of ThaiUtil 
       http://www.narisa.com/forums/index.php?showtopic=2738  */
    public static String Unicode2ASCII(String unicode) {
        StringBuffer ascii = new StringBuffer(unicode);
        int code;
        for(int i = 0; i < unicode.length(); i++) {
            code = (int)unicode.charAt(i);
            if ((0xE01<=code) && (code <= 0xE5B ))
                ascii.setCharAt( i, (char)(code - 0xD60));
        }
        return ascii.toString();
    }
    public static String ASCII2Unicode(String ascii) {
        StringBuffer unicode = new StringBuffer(ascii);
        int code;
        for(int i = 0; i < ascii.length(); i++) {
            code = (int)ascii.charAt(i);
            if ((0xA1 <= code) && (code <= 0xFB))
                unicode.setCharAt( i, (char)(code + 0xD60));
        }
        return unicode.toString();
    }  
}

import java.sql.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;  
public class TextareaList implements ActionListener{
Connection connection;
Statement statement;
TextArea text =new TextArea();
String sourceURL = "jdbc:odbc:student";
Frame f = new Frame("select");
Button bexit = new Button("Exit");
// 01- main
public static void main(String args[]) {
new TextareaList().init();
}
// 02 - init
void init() {
f.setSize(700,400);   
f.setLocation(80,50); 
f.setLayout(null);
f.setResizable(true);
f.setBackground(Color.pink);
f.add(bexit);
f.add(text);
text.setBounds(115,30,200,300);
bexit.setBounds(10,30,100,30);
bexit.addActionListener(this);
showRegisRecord();
f.setVisible(true);
}
// 03 - rpt01
public TextareaList() {
try {
  Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
  connection = DriverManager.getConnection(sourceURL);
  statement = connection.createStatement();
} catch (SQLException sqle) {
  System.err.println("Error creating connection");
} catch (ClassNotFoundException cnfe) {
  System.err.println(cnfe.toString());
}
}
// 04 - actionPerformed
public void actionPerformed(ActionEvent a) {
if (a.getSource()== bexit) System.exit(0);
} 
// 05 - showRegisRecord
public void showRegisRecord() {
try {
statement = connection.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, 
  ResultSet.CONCUR_READ_ONLY);
ResultSet ShowAll = statement.executeQuery("SELECT  *  FROM reg_student");
String tmp;
ShowAll.last();
int crow=ShowAll.getRow();
ShowAll.first();
if (crow>=1) while (!ShowAll.isAfterLast()) {  
tmp=ShowAll.getString(3); 
text.setText(tmp.toString()+ "\n" + text.getText() );
ShowAll.next();
}
} catch (SQLException sqle) {
System.err.println("\nSQLException:\n");
}
} // end showRegisRecord
} // end class

import java.sql.*;
import java.awt.*;
import java.awt.event.*;
public class myselect implements ActionListener{
Connection connection;
Statement statement;
TextField text_result =new TextField();
TextField text_key =new TextField();
String sourceURL = "jdbc:odbc:student";
Frame f = new Frame("select");
Button bsearch = new Button("search");
String k;
// 01- main
public static void main(String args[]) {
  new myselect().init(); 
}
// 02 - init
void init() {
  f.setSize(400,150);   
  f.setLocation(80,50); 
  f.setLayout(null);
  f.setVisible(true);
  f.add(text_key);
  text_key.setBounds(10,30,200,30);
  text_key.setText("civi 101");
  f.add(text_result);
  text_result.setBounds(10,70,200,30);
  f.add(bsearch);
  bsearch.setBounds(10,100,100,30);
  bsearch.addActionListener(this);
}
// 03 - constructor
public myselect() {
try {
  Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
  connection = DriverManager.getConnection(sourceURL);
} catch (SQLException sqle) {
  System.err.println("Error creating connection");
} catch (ClassNotFoundException cnfe) {
  System.err.println(cnfe.toString());
}
}
// 04 - actionPerformed
public void actionPerformed(ActionEvent a) {
if (a.getSource()== bsearch) {
try {
  statement = connection.createStatement(
    ResultSet.TYPE_SCROLL_SENSITIVE, 
    ResultSet.CONCUR_READ_ONLY); // required for parameters
  k = text_key.getText();
  String sql = "SELECT  *  FROM subject where subid = '" +  k + "'";
  ResultSet ShowAll = statement.executeQuery(sql);
  if (ShowAll.first()) { text_result.setText(ShowAll.getString(2)); }
  else { text_result.setText("not found"); }
} catch (SQLException sqle) {
  System.err.println("Error creating connection");
} // end try ..catch
} // end if
} // end actionPerformed
} // end class

import java.sql.*;
import java.awt.*;
import java.awt.event.*;
public class myinsert implements ActionListener{
Connection connection;
Statement statement;
TextField text_key1 =new TextField();
TextField text_key2 =new TextField();
TextField text_result =new TextField();
String sourceURL = "jdbc:odbc:student";
Frame f = new Frame("insert");
Button binsert = new Button("insert");
String k1,k2;
// 01- main
public static void main(String args[]) {
  new myinsert().init(); 
}
// 02 - init
void init() {
  f.setSize(500,200);   
  f.setLocation(80,50); 
  f.setLayout(null);
  f.setVisible(true);
  f.add(text_key1);
  text_key1.setBounds(10,30,200,30);
  f.add(text_key2);
  text_key2.setBounds(10,70,200,30);
  f.add(text_result);
  text_result.setBounds(10,110,450,30);
  text_result.setEnabled(false);
  f.add(binsert);
  binsert.setBounds(10,150,100,30);
  binsert.addActionListener(this);
}
// 03 - constructor
public myinsert() {
try {
  Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
  connection = DriverManager.getConnection(sourceURL);
} catch (SQLException sqle) {
  System.err.println("Error creating connection");
} catch (ClassNotFoundException cnfe) {
  System.err.println(cnfe.toString());
}
}
// 04 - actionPerformed
public void actionPerformed(ActionEvent a) {
if (a.getSource()== binsert) {
try {
  statement = connection.createStatement(
    ResultSet.TYPE_SCROLL_SENSITIVE, 
    ResultSet.CONCUR_READ_ONLY); // required for parameters
  k1 = text_key1.getText();
  k2 = text_key2.getText();
  String sql = "insert into subject(subid,subname)";
  sql += "values ('" +  k1 + "','" +  k2 + "')";
  statement.executeUpdate(sql);  
  text_key1.setText(""); 
  text_key2.setText(""); 
  text_result.setText(sql); 
} catch (SQLException sqle) {
  System.err.println("Error creating connection : " + sqle.toString());
} // end try ..catch
} // end if
} // end actionPerformed
} // end class