*Main.class

package Swing;

import javax.swing.JFrame;

public class Main {

    public static void main(String[]args){

/*        JFrame frame=new JFrame("Dang ki thong tin");

        frame.setBounds(100,100,500,500);

        frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);

        frame.setVisible(true);

*/       

    Vidu vd=new Vidu();   

    }

}

*Vidu.class

 package Swing;  

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import javax.swing.ButtonGroup;

import javax.swing.DefaultListModel;

import javax.swing.JButton;

import javax.swing.JCheckBox;

import javax.swing.JTextField;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JList;

import javax.swing.JRadioButton;

import javax.swing.JScrollPane;

import javax.swing.ListSelectionModel;

import javax.swing.event.ListSelectionEvent;

import javax.swing.event.ListSelectionListener;

public class Vidu extends JFrame implements ListSelectionListener {

    JButton button;

    JLabel label;

    JCheckBox checkbox;

//    JRadioButton radiobutton;

    JList list;

    DefaultListModel listModel;

//    JScrollPane listScrollPane;

    JTextField textfield;

    public Vidu(){

        super("Dang ki thong tin");

        setBounds(100,100,400,400);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        GridBagLayout layout=new GridBagLayout();

        GridBagConstraints constraint=new GridBagConstraints();

        getContentPane().setLayout(layout);

//tao nhan hoten, ngaysinh, gioi tinh, lop

        label=new JLabel("Ho ten:");

        constraint.gridx=0;

        constraint.gridy=0;

        constraint.gridwidth=0;

        constraint.gridheight=0;

        constraint.weightx=0;

        constraint.weighty=0;

        constraint.anchor = GridBagConstraints.NORTHWEST;

        constraint.insets = new Insets(10,20,10,10);

        getContentPane().add(label,constraint);

        //tao textfield

        textfield=new JTextField(15);

        constraint.gridx=1;

        constraint.gridy=0;

        constraint.gridwidth=2;

        constraint.gridheight=1;

//        constraint.weightx=0;

//        constraint.weighty=0;

        getContentPane().add(textfield,constraint);

        label=new JLabel("Ngay sinh:");

        constraint.gridx=0;

        constraint.gridy=1;

        constraint.gridheight=1;

        constraint.gridwidth=1;

        getContentPane().add(label,constraint);

        textfield=new JTextField(15);

        constraint.gridx=1;

        constraint.gridy=1;

        constraint.gridwidth=2;

        constraint.gridheight=1;

        getContentPane().add(textfield,constraint);

        label=new JLabel("Gioi tinh:");

        constraint.gridx=0;

        constraint.gridy=2;

        constraint.gridheight=1;

        getContentPane().add(label,constraint);

/*        checkbox=new JCheckBox("Nam");

        constraint.gridx=1;

        constraint.gridy=2;

        constraint.gridheight=1;

        constraint.gridwidth=1;

//        constraint.insets=new Insets(0,0,0,5);

        getContentPane().add(checkbox,constraint);

        checkbox=new JCheckBox("Nu");

        constraint.gridx=2;

        constraint.gridy=2;

        constraint.gridheight=1;

        getContentPane().add(checkbox,constraint);

*/       

        @SuppressWarnings("unused")

        ButtonGroup cb=new ButtonGroup();

        JRadioButton radiobutton1=new JRadioButton("Nam",true);

        constraint.gridx=1;

        constraint.gridy=2;

        constraint.gridheight=1;

        constraint.gridwidth=1;

        getContentPane().add(radiobutton1,constraint);

        JRadioButton radiobutton2=new JRadioButton("Nu",false);

        constraint.gridx=2;

        constraint.gridy=2;

        constraint.gridheight=1;

        constraint.gridwidth=1;

        getContentPane().add(radiobutton2,constraint);

        ButtonGroup bg=new ButtonGroup();

        bg.add(radiobutton1);

        bg.add(radiobutton2);

        label=new JLabel("Lop:");

        constraint.gridx=0;

        constraint.gridy=3;

        constraint.gridheight=1;

        constraint.gridwidth=1;

        getContentPane().add(label,constraint);

        listModel=new DefaultListModel();

        listModel.addElement("Danh sach");

        listModel.addElement("08B1");

        listModel.addElement("08B2");

        listModel.addElement("08B3");

        listModel.addElement("08B4");

        listModel.addElement("08B5");

        listModel.addElement("08B6");

        list=new JList(listModel);

        list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

        list.setSelectedIndex(0);

        list.addListSelectionListener(this);

        JScrollPane listScrollPane=new JScrollPane(list);

        listScrollPane.setSize(10,10);

        constraint.gridx=1;

        constraint.gridy=3;

        constraint.gridheight=2;

        constraint.gridwidth=2;

        constraint.weighty=1;

//        getContentPane().add(list,constraint);

        getContentPane().add(listScrollPane,constraint);

        //tao button Dangki

        button=new JButton("Dang ki");

        constraint.gridx=1;

        constraint.gridy=10;

        constraint.gridwidth=1;

        constraint.gridheight=1;

//        constraint.fill=GridBagConstraints.NONE;

        getContentPane().add(button,constraint);

        setVisible(true);

    }     

    }

}