CheckUtil (Net4j Utilities Documentation)

```
public final class CheckUtil
extends Object
```
Provides static methods that check object states and invocation arguments.

Methods
Modifier and Type	Method and Description
`static void`	`checkArg(boolean expr, String msg)`
`static void`	`checkArg(Object handle, String handleName)`
`static void`	`checkNull(Object handle, String msg)`
`static void`	`checkState(boolean expr, String msg)`
`static void`	`checkState(Object handle, String handleName)`

public static void checkNull(Object handle,
             String msg)
                      throws NullPointerException

public static void checkArg(boolean expr,
            String msg)
                     throws IllegalArgumentException

public static void checkArg(Object handle,
            String handleName)
                     throws IllegalArgumentException

public static void checkState(boolean expr,
              String msg)
                       throws IllegalStateException

public static void checkState(Object handle,
              String handleName)
                       throws IllegalStateException

Class CheckUtil