Đề 3 KMA

import java.awt.*;
import java.awt.event.*;

public class De3 extends Frame implements ActionListener {

    private Label lbForm, lbName, lbSex, lbAddress;
    private TextField tfName, tfAddress;
    private Button btRegis, btCancel;
    private CheckboxGroup cbgSex;
    private Checkbox cbMale, cbFemale;
    private GridBagLayout gb;
    private GridBagConstraints gbc;

    public De3(String title) {
        super(title);
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent we) {
                System.exit(0);
            }
        });

        lbForm = new Label("Form Test");
        lbName = new Label("Name:");
        lbAddress = new Label("Address:");
        lbSex = new Label("Sex:");
        tfName = new TextField(20);
        tfAddress = new TextField(20);
        btRegis = new Button("Regis");
        btCancel = new Button("Cancel");
        cbgSex = new CheckboxGroup();
        cbMale = new Checkbox("Male",cbgSex,false);
        cbFemale = new Checkbox("Female",cbgSex,false);

        gb = new GridBagLayout();
        this.setLayout(gb);
        Them(lbForm,0,0,3,1);
        Them(lbName,0,1,1,1);
        Them(tfName,1,1,2,1);
        Them(lbSex,0,2,1,1);
        Them(cbMale,1,2,1,1);
        Them(cbFemale,2,2,1,1);
        Them(lbAddress,0,3,1,1);
        Them(tfAddress,1,3,2,1);
        Them(btRegis,1,4,1,1);
        Them(btCancel,2,4,1,1);

        btRegis.addActionListener(this);
        btCancel.addActionListener(this);
    }

    public void Them(Component comp, int x, int y, int rong, int cao) {
        gbc = new GridBagConstraints();
        gbc.gridx = x;
        gbc.gridy = y;
        gbc.gridwidth = rong;
        gbc.gridheight = cao;
        gb.setConstraints(comp, gbc);
        this.add(comp);
    }

    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == btRegis) {
            System.out.println ("Name: " + tfName.getText());
            if (cbMale.getState()) {
                System.out.println ("Sex: Male");
            }
            if (cbFemale.getState()) {
                System.out.println ("Sex: Female");
            }
            System.out.println ("Address: " + tfAddress.getText());
        }
        if  (ae.getSource() == btCancel) {
            System.exit(0);
        }
    }

    public static void main(String[] args) {
        De3 fr = new De3("De 3 - Form Test");
        fr.setSize(300,200);
        fr.setVisible(true);
    }
}