JavaDemo

import java.awt.Button;

import java.awt.Color;

import java.awt.FlowLayout;

import java.awt.Frame;

import java.awt.Panel;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;



public class HelloForm extends Frame {

    public HelloForm() {

        setTitle("Java Demo");

        setSize(600, 400);

        setResizable(false);

        setLocationRelativeTo(getOwner());

        setVisible(true);



        this.addWindowListener(new WindowAdapter() {

            public void windowClosing(WindowEvent e) {

                System.exit(0);

            }

        });



        Panel panel1 = new Panel();

        panel1.setBackground(Color.blue);

        panel1.setLocation(0, 0);

        

        Panel panel2 = new Panel();

        panel2.setBackground(Color.red);

        panel2.setLocation(0, 30);

        

        add(panel1);

        add(panel2);

    }



    private void p1init() {

        Panel p1, p2, p3;

        Button b1, b2, b3;

        Button n1, n2;

        Button s1, s2;

        p1 = new Panel();



        p1.setBackground(Color.blue);

        p1.setLocation(0, 30);

        p1.setSize(200, 50);



        add(p1);

    }

}

import sun.misc.BASE64Decoder;

import sun.misc.BASE64Encoder;



public class Base64 {



    public static byte[] decryptBASE64(String key) throws Exception {

        return (new BASE64Decoder()).decodeBuffer(key);

    }



    public static String encryptBASE64(byte[] key) throws Exception {

        return (new BASE64Encoder()).encodeBuffer(key);

    }



    public static void main(String[] args) throws Exception {

        String data = Base64.encryptBASE64("hello".getBytes());

        System.out.println( data);



        byte[] byteArray = Base64.decryptBASE64(data);

        System.out.println(new String(byteArray));

    }

}

 

package DAL;



import javax.swing.*;

import java.awt.*;



public class wang extends JFrame {

    private static final long serialVersionUID = 1L;

    private Container contentPane;

    private JLabel lbl;



    public wang() {

        contentPane = getContentPane();

        lbl = new JLabel("Hello World :->", 0);

        contentPane.add(lbl);

        setSize(640, 480);

        // setLocation(new Point(200, 300));

        setLocationRelativeTo(this);

        setDefaultCloseOperation(EXIT_ON_CLOSE);

    }



    public static void main(String[] args) {

        new wang().setVisible(true);

    }

}