JSF Question about getters

Question

Hi all! I`ve made a simple page with one input text and submit button. I attached a managed bean to the page and getters and setters for the input. The bean looks like this:
public class User {
     private String name;
     public User() {
     public String getName() {
          System.out.println("getName");
          return name;
     public void setName(String name) {
          this.name = name;
     public String act() {
          return null;
}When i open the page in the browser the getter method is invoked once. When i click on the submit button the getter is invoked two times. So i get:
getName
getName
getName
Why the jsf invokes the getter two times after submit?

Answer 1

You have to learn about lifecycle.
http://www.developertutorials.com/tutorials/java/jsp-application-lifecycle-050504/page14.html
JSF for Nonbelievers: The JSF Application Lifecycle - Immediate Event Handling