InputUtil (GWT Utils 1.7.1 API)

```
public class InputUtil
extends Object
```
Methods for gathering required user input prior to taking an action. A typical method pattern here is to retrieve and validate some widget's value, guaranteeing the return value will be suitably constrained. And if the value is not constrained, inform the user and throw InputException.

Constructors
Constructor and Description
`InputUtil()`

Methods
Modifier and Type	Method and Description
`static <T extends FocusWidget & HasText> String`	`requireNonEmpty(T widget, String error)` Returns a text widget's value, making sure it is non-empty.

public static <T extends FocusWidget & HasText> String requireNonEmpty(T widget,
                                                      String error)

Returns a text widget's value, making sure it is non-empty.

Class InputUtil