📄 showaddlistenersframe.html

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<html><head><title>Display page for ShowAddListeners at www.BruceEckel.com</title></head>
<FONT FACE="Verdana,Tahoma,Arial,Helvetica,Sans" SIZE="-1">
<FONT FACE="Verdana,Tahoma,Arial,Helvetica,Sans"><H2>ShowAddListeners.java</H2><hr></FONT>
<!--"CONVERTED_APPLET"-->
<!-- HTML CONVERTER -->
<OBJECT 
    classid = "clsid:CAFEEFAC-0014-0001-0001-ABCDEFFEDCBA"
    codebase = "http://java.sun.com/products/plugin/autodl/jinstall-1_4_1_01-windows-i586.cab#Version=1,4,1,1"
    WIDTH = "500" HEIGHT = "400" ALIGN = "baseline" >
    <PARAM NAME = CODE VALUE = "ShowAddListeners.class" >
    <PARAM NAME = "type" VALUE = "application/x-java-applet;jpi-version=1.4.1_01">
    <PARAM NAME = "scriptable" VALUE = "false">

    <COMMENT>
	<EMBED 
            type = "application/x-java-applet;jpi-version=1.4.1_01" 
            CODE = "ShowAddListeners.class"
            WIDTH = "500"
            HEIGHT = "400"
            ALIGN = "baseline"  
	    scriptable = false 
	    pluginspage = "http://java.sun.com/products/plugin/index.html#download">
	    <NOEMBED>
            
            </NOEMBED>
	</EMBED>
    </COMMENT>
</OBJECT>

<!--
<APPLET CODE = "ShowAddListeners.class" WIDTH = "500" HEIGHT = "400" ALIGN = "baseline">


</APPLET>
-->


<!--"END_CONVERTED_APPLET"-->

<FONT SIZE="+3"><PRE><B>
//: c14:ShowAddListeners.java
// Display the "addXXXListener" methods of any Swing class.
// &lt;applet code=ShowAddListeners
// width=500 height=400&gt;&lt;/applet&gt;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*;
import java.util.regex.*;
import com.bruceeckel.swing.*;

public class ShowAddListeners extends JApplet {
  private JTextField name = new JTextField(25);
  private JTextArea results = new JTextArea(40, 65);
  private static Pattern addListener =
    Pattern.compile("(add\\w+?Listener\\(.*?\\))");
  private static Pattern qualifier =
    Pattern.compile("\\w+\\.");
  class NameL implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      String nm = name.getText().trim();
      if(nm.length() == 0) {
        results.setText("No match");
        return;
      }
      Class klass;
      try {
        klass = Class.forName("javax.swing." + nm);
      } catch(ClassNotFoundException ex) {
        results.setText("No match");
        return;
      }
      Method[] methods = klass.getMethods();
      results.setText("");
      for(int i = 0; i &lt; methods.length; i++) {
        Matcher matcher =
          addListener.matcher(methods[i].toString());
        if(matcher.find())
          results.append(qualifier.matcher(
            matcher.group(1)).replaceAll("") + "\n");
      }
    }
  }
  public void init() {
    NameL nameListener = new NameL();
    name.addActionListener(nameListener);
    JPanel top = new JPanel();
    top.add(new JLabel("Swing class name (press ENTER):"));
    top.add(name);
    Container cp = getContentPane();
    cp.add(BorderLayout.NORTH, top);
    cp.add(new JScrollPane(results));
    // Initial data and test:
    name.setText("JTextArea");
    nameListener.actionPerformed(
      new ActionEvent("", 0 ,""));
  }
  public static void main(String[] args) {
    Console.run(new ShowAddListeners(), 500,400);
  }
} ///:~

</B></PRE></FONT>
</html>
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