📄 messageboxesframe.html

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<html><head><title>Display page for MessageBoxes at www.BruceEckel.com</title></head><FONT FACE="Verdana,Tahoma,Arial,Helvetica,Sans"><H2>MessageBoxes.java</H2><hr></FONT>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
    width="200" height="150" align="baseline"
    codebase="http://java.sun.com/products/plugin/1.2.2/jinstall-1_2_2-win.cab#Version=1,2,2,0">
<PARAM NAME="code" VALUE="MessageBoxes.class">
<PARAM NAME="codebase" VALUE=".">
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.2.2">
<COMMENT>
    <EMBED type="application/x-java-applet;version=1.2.2" 
       width="200" height="150" align="baseline" 
       code="MessageBoxes.class" 
       codebase="."
       pluginspage="http://java.sun.com/products/plugin/1.2/plugin-install.html">
    <NOEMBED>
    </COMMENT>
       No Java 2 support for APPLET!!
    </NOEMBED></EMBED>
</OBJECT>
<FONT SIZE="+3"><PRE><B>
//: c13:MessageBoxes.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Demonstrates JoptionPane.
// &lt;applet code=MessageBoxes 
// width=200 height=150&gt; &lt;/applet&gt;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import com.bruceeckel.swing.*;

public class MessageBoxes extends JApplet {
  JButton[] b = { new JButton("Alert"), 
    new JButton("Yes/No"), new JButton("Color"),
    new JButton("Input"), new JButton("3 Vals")
  };
  JTextField txt = new JTextField(15);
  ActionListener al = new ActionListener() {
    public void actionPerformed(ActionEvent e){
      String id = 
        ((JButton)e.getSource()).getText();
      if(id.equals("Alert"))
        JOptionPane.showMessageDialog(null, 
          "There's a bug on you!", "Hey!", 
          JOptionPane.ERROR_MESSAGE);
      else if(id.equals("Yes/No"))
        JOptionPane.showConfirmDialog(null, 
          "or no", "choose yes", 
          JOptionPane.YES_NO_OPTION);
      else if(id.equals("Color")) {
        Object[] options = { "Red", "Green" };
        int sel = JOptionPane.showOptionDialog(
          null, "Choose a Color!", "Warning", 
          JOptionPane.DEFAULT_OPTION, 
          JOptionPane.WARNING_MESSAGE, null, 
          options, options[0]);
          if(sel != JOptionPane.CLOSED_OPTION)
            txt.setText(
              "Color Selected: " + options[sel]);
      } else if(id.equals("Input")) {
        String val = JOptionPane.showInputDialog(
            "How many fingers do you see?"); 
        txt.setText(val);
      } else if(id.equals("3 Vals")) {
        Object[] selections = {
          "First", "Second", "Third" };
        Object val = JOptionPane.showInputDialog(
          null, "Choose one", "Input",
          JOptionPane.INFORMATION_MESSAGE, 
          null, selections, selections[0]);
        if(val != null)
          txt.setText(
            val.toString());
      }
    }
  };
  public void init() {
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    for(int i = 0; i &lt; b.length; i++) {
      b[i].addActionListener(al);
      cp.add(b[i]);
    }
    cp.add(txt);
  }
  public static void main(String[] args) {
    Console.run(new MessageBoxes(), 200, 200);
  }
} ///:~
</B></PRE></FONT></body></html>
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