[CLOSED] ComboBox.select before rendering gives NullPointerException

[makados]

If I try to use method select just after creation ComboBox throws a NullPointerException. For example the next code:

ComboBox comboBox = new ComboBox();
            comboBox.setStore(listStore);
            comboBox.setDisplayField("name");
            comboBox.setEditable(true);
            comboBox.select(1);

gives

[ERROR] Uncaught exception escaped
java.lang.NullPointerException: null
    at com.extjs.gxt.ui.client.widget.form.ComboBox.select(ComboBox.java:351)

PS. I have 3 items in the comboBox and it works well without using method select. But I need to select values.

[darrellmeyer]

  /**
   * Select an item in the dropdown list by its numeric index in the list. This
   * function does NOT cause the select event to fire. The list must expanded
   * for this function to work, otherwise use #setValue.
   * 
   * @param index the index of the item to select
   */
  public void select(int index) {}

You most likely want to be using setValue. select should only be used when the list is expanded. I changed the code so that the null pointer will not be thrown.