dialogmessage.java

由于想一次上传成功 所以将二个教程打包成了一个 这些例子几乎包含了所有java的框架集合

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

/*
<APPLET
    CODE = dialogmessage.class
    WIDTH = 350
    HEIGHT = 280 >
</APPLET>
*/

public class dialogmessage extends JApplet implements ActionListener
{
    JButton jbutton1 = new JButton("Display information dialog");
    JButton jbutton2 = new JButton("Display error dialog");
    JButton jbutton3 = new JButton("Display warning dialog");
    JButton jbutton4 = new JButton("Display question dialog");
    JButton jbutton5 = new JButton("Display plain dialog");

    public void init() 
    {
        Container contentPane = getContentPane();

        contentPane.setLayout(new FlowLayout());

        contentPane.add(jbutton1);
        contentPane.add(jbutton2);
        contentPane.add(jbutton3);
        contentPane.add(jbutton4);
        contentPane.add(jbutton5);

        jbutton1.addActionListener(this);
        jbutton2.addActionListener(this);
        jbutton3.addActionListener(this);
        jbutton4.addActionListener(this);
        jbutton5.addActionListener(this);
    }    

    public void actionPerformed(ActionEvent e) 
    {
            String dialogtitle = "Dialog";
            String dialogmessage = "Hello from Swing!";
            int dialogtype = JOptionPane.PLAIN_MESSAGE;

            if(e.getSource() == jbutton1) {
                dialogtype = JOptionPane.INFORMATION_MESSAGE;
            } else if(e.getSource() == jbutton2) {
                dialogtype = JOptionPane.ERROR_MESSAGE;
            } else if(e.getSource() == jbutton3) {
                dialogtype = JOptionPane.WARNING_MESSAGE;
            } else if(e.getSource() == jbutton4) {
                dialogtype = JOptionPane.QUESTION_MESSAGE;
            } else if(e.getSource() == jbutton5) {
                dialogtype = JOptionPane.PLAIN_MESSAGE;
            } 
        
            JOptionPane.showMessageDialog((Component) null, 
                  dialogmessage, dialogtitle, dialogtype);
    }
}