Java Development Tools

version : Jdeveloper 11g r2

Below is a validator method which belongs to an attribute in a page ,but not working with me

Attribute Type =    String

validator         =    validatorStoreName()

but in case i change the if condition to be like this "if (newValue.length()>0 || newValue!=null ) " it works fine

public void validatorStoreName(FacesContext facesContext, UIComponent uIComponent, Object object) {
     

        FacesContext fc = FacesContext.getCurrentInstance();

        String newValue = (String)object;     

        if (newValue.length()==0 || newValue==null ) {

             System.out.println("null 1_____ "+"object= "+object+" newvalue= "+newValue);

             FacesMessage message =new FacesMessage(FacesMessage.SEVERITY_ERROR, "Null Value not allowed",null);

             fc.addMessage(uIComponent.getClientId(fc), message);

             ((RichInputText)uIComponent).setValid(false);
         }
         else {
             System.out.println("object= "+object+" newvalue= "+newValue);
         }
     }

Take in consideration " I'm beginner "

Thanks in advance