Jsp Basico..Mas nao consigo fazer aonde estou errand?

import java.io.IOException;

import javax.servlet.jsp.JspException;

import javax.servlet.jsp.JspWriter;

import javax.servlet.jsp.tagext.BodyContent;

import javax.servlet.jsp.tagext.BodyTagSupport;

import javax.swing.*;

/**

/**
 * Initialization of numero property.
 */
private int numero;
private String numero2;

/** Creates new instance of tag handler */
public Duplicar() {
    super();
}

////////////////////////////////////////////////////////////////
///                                                          ///
///   User methods.                                          ///
///                                                          ///
///   Modify these methods to customize your tag handler.    ///
///                                                          ///
////////////////////////////////////////////////////////////////

/**
 * Method called from doStartTag().
 * Fill in this method to perform other operations from doStartTag().
 *
 */
private void otherDoStartTagOperations()  {
   
    
    JspWriter out = pageContext.getOut();
    try {
        numero = Integer.parseInt(numero2);
        out.println(numero*2);
    } catch (IOException ex) {
        ex.printStackTrace();
    }

     //
    // TODO: code that performs other operations in doStartTag
    //       should be placed here.
    //       It will be called after initializing variables,
    //       finding the parent, setting IDREFs, etc, and
    //       before calling theBodyShouldBeEvaluated().
    //
    //       For example, to print something out to the JSP, use the following:
    //
    //   try {
    //       JspWriter out = pageContext.getOut();
    //       out.println("something");
    //   } catch (IOException ex) {
    //       // do something
    //   }
    //
    //
}

/**
 * Method called from doEndTag()
 * Fill in this method to perform other operations from doEndTag().
 *
 */
private void otherDoEndTagOperations() {
    //
    // TODO: code that performs other operations in doEndTag
    //       should be placed here.
    //       It will be called after initializing variables,
    //       finding the parent, setting IDREFs, etc, and
    //       before calling shouldEvaluateRestOfPageAfterEndTag().
    //
}

/**
 * Fill in this method to process the body content of the tag.
 * You only need to do this if the tag's BodyContent property
 * is set to "JSP" or "tagdependent."
 * If the tag's bodyContent is set to "empty," then this method
 * will not be called.
 */
private void writeTagBodyContent(JspWriter out, BodyContent bodyContent) throws IOException {
    //
    // TODO: insert code to write html before writing the body content.
    // e.g.:
    //
    // out.println("<strong>" + attribute_1 + "</strong>");
    // out.println("   <blockquote>");
    
    //
    // write the body content (after processing by the JSP engine) on the output Writer
    //
    bodyContent.writeOut(out);
    
    //
    // Or else get the body content as a string and process it, e.g.:
    //     String bodyStr = bodyContent.getString();
    //     String result = yourProcessingMethod(bodyStr);
    //     out.println(result);
    //
    
    // TODO: insert code to write html after writing the body content.
    // e.g.:
    //
    // out.println("   </blockquote>");
    
    
    // clear the body content for the next time through.
    bodyContent.clearBody();
}

////////////////////////////////////////////////////////////////
///                                                          ///
///   Tag Handler interface methods.                         ///
///                                                          ///
///   Do not modify these methods; instead, modify the       ///
///   methods that they call.                                ///
///                                                          ///
////////////////////////////////////////////////////////////////

/**
 * This method is called when the JSP engine encounters the start tag,
 * after the attributes are processed.
 * Scripting variables (if any) have their values set here.
 * @return EVAL_BODY_BUFFERED if the JSP engine should evaluate the tag body, otherwise return SKIP_BODY.
 * This method is automatically generated. Do not modify this method.
 * Instead, modify the methods that this method calls.
 */

public int doStartTag() throws JspException, JspException {
    otherDoStartTagOperations();
    
    if (theBodyShouldBeEvaluated()) {
        return EVAL_BODY_BUFFERED;
    } else {
        return SKIP_BODY;
    }
}

/**
 * This method is called after the JSP engine finished processing the tag.
 * @return EVAL_PAGE if the JSP engine should continue evaluating the JSP page, otherwise return SKIP_PAGE.
 * This method is automatically generated. Do not modify this method.
 * Instead, modify the methods that this method calls.
 */
public int doEndTag() throws JspException, JspException {
    otherDoEndTagOperations();
    
    if (shouldEvaluateRestOfPageAfterEndTag()) {
        return EVAL_PAGE;
    } else {
        return SKIP_PAGE;
    }
}

/**
 * This method is called after the JSP engine processes the body content of the tag.
 * @return EVAL_BODY_AGAIN if the JSP engine should evaluate the tag body again, otherwise return SKIP_BODY.
 * This method is automatically generated. Do not modify this method.
 * Instead, modify the methods that this method calls.
 */
public int doAfterBody() throws JspException {
    try {
        //
        // This code is generated for tags whose bodyContent is "JSP"
        //
        BodyContent bodyContent = getBodyContent();
        JspWriter out = bodyContent.getEnclosingWriter();
        
        writeTagBodyContent(out, bodyContent);
    } catch (Exception ex) {
        handleBodyContentException(ex);
    }
    
    if (theBodyShouldBeEvaluatedAgain()) {
        return EVAL_BODY_AGAIN;
    } else {
        return SKIP_BODY;
    }
}

/**
 * Handles exception from processing the body content.
 */
private void handleBodyContentException(Exception ex) throws JspException {
    // Since the doAfterBody method is guarded, place exception handing code here.
    throw new JspException("error in NewTag: " + ex);
}

/**
 * Fill in this method to determine if the rest of the JSP page
 * should be generated after this tag is finished.
 * Called from doEndTag().
 */
private boolean shouldEvaluateRestOfPageAfterEndTag()  {
    //
    // TODO: code that determines whether the rest of the page
    //       should be evaluated after the tag is processed
    //       should be placed here.
    //       Called from the doEndTag() method.
    //
    return true;
}

/**
 * Fill in this method to determine if the tag body should be evaluated
 * again after evaluating the body.
 * Use this method to create an iterating tag.
 * Called from doAfterBody().
 */
private boolean theBodyShouldBeEvaluatedAgain() {
    //
    // TODO: code that determines whether the tag body should be
    //       evaluated again after processing the tag
    //       should be placed here.
    //       You can use this method to create iterating tags.
    //       Called from the doAfterBody() method.
    //
    return false;
}

/**
 * Fill in this method to determine if the tag body should be evaluated.
 * Called from doStartTag().
 */
private boolean theBodyShouldBeEvaluated() {
    //
    // TODO: code that determines whether the body should be
    //       evaluated should be placed here.
    //       Called from the doStartTag() method.
    //
    return true;
}

/**
 * Setter for the numero attribute.
 */
public void setNumero(int value) {
    this.numero = value;
}

 public void setNumero2(String numero2) {
    this.numero2 = numero2;
}

<h1>JSP Page</h1>

    <form action="TPExe01.jsp" method="POST">
        <input type="submit" value="envia" />
        <input type="password" name="pass" value="" />
     </form>
</body>

<minhatag:Duplicar numero2="pass" />

   
</body>

<?xml version=“1.0” encoding=“UTF-8”?>

<taglib version=“2.0” xmlns=“<a href="http://java.sun.com/xml/ns/j2ee">http://java.sun.com/xml/ns/j2ee</a>” xmlns:xsi=“<a href="http://www.w3.org/2001/XMLSchema-instance">http://www.w3.org/2001/XMLSchema-instance</a>” xsi:schemaLocation=“<a href="http://java.sun.com/xml/ns/j2ee">http://java.sun.com/xml/ns/j2ee</a> web-jsptaglibrary_2_0.xsd”>

<tlib-version>1.0</tlib-version>

<short-name>duplicar</short-name>

<uri>/WEB-INF/tlds/duplicar</uri>

<!-- A validator verifies that the tags are used correctly at JSP

translation time. Validator entries look like this:

<validator>

<validator-class>com.mycompany.TagLibValidator</validator-class>

<init-param>

<param-name>parameter</param-name>

<param-value>value</param-value>

</init-param>

</validator>

–>

<!-- A tag library can register Servlet Context event listeners in

case it needs to react to such events. Listener entries look

like this:

<listener>

<listener-class>com.mycompany.TagLibListener</listener-class>

</listener>

–>

<tag>

<name>Duplicar</name>

<tag-class>br.estacio.Duplicar</tag-class>

<body-content>scriptless</body-content>

<attribute>

<name>numero2</name>

<required>true</required>

<rtexprvalue>true</rtexprvalue>

<type>java.lang.String</type>

</attribute>

<attribute>

<name>numero</name>

<rtexprvalue>true</rtexprvalue>

<type>int</type>

</attribute>

</tag>

</taglib>