private void validateTabbed(int tabIndex) {
		if (!isTabbed()) {
			throw new IllegalArgumentException("Not initialised as a tabbed dialog - must use method without tab parameters");
		}
		if (tabIndex < 0 || tabIndex >= this.tabPanels.size()) {
			throw new IllegalArgumentException("Invalid tab index: " + tabIndex);
		}
	}
private void validateTabbed ( int tabIndex ) { if ( ! isTabbed ( ) ) { throw new IllegalArgumentException ( "Not initialised as a tabbed dialog - must use method without tab parameters" ) ; } if ( tabIndex < 0 || tabIndex >= this . tabPanels . size ( ) ) { throw new IllegalArgumentException ( "Invalid tab index: " + tabIndex ) ; } }
Validates that the dialogue is tabbed and the given tab index is valid.

@param tabIndex the index of the tab to validate.
@throws IllegalArgumentException if the dialogue was not initialised with tabs or if no tab exists with the given index.
@see #validateNotTabbed()