package mytags;  
import javax.servlet.jsp.tagext.*;
import javax.servlet.jsp.*;
import java.io.*;  

public class UseInput extends SimpleTagSupport {
    private int number;  

    public void setNumber(int number) {  //A convention for naming the setter.
        this.number = number;  
    }  

    public void doTag() throws JspException, IOException
    {
        getJspContext().getOut().print(number+2);
    }

}