NullPointerException (Java Card API, Connected Edition)
Date: 2009-12-11

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## java.lang
Class NullPointerException

    java.lang.Object
      java.lang.Throwable
          java.lang.Exception
              java.lang.RuntimeException
                  java.lang.NullPointerException

    @TransactionType(value=NOT_SUPPORTED)
    public class NullPointerException

extends RuntimeException

Thrown when an application attempts to use `null` in a case where an object is required. These include:

- Calling the instance method of a `null` object.
- Accessing or modifying the field of a `null` object.
- Taking the length of `null` as if it were an array.
- Accessing or modifying the slots of `null` as if it were an array.
- Throwing `null` as if it were a `Throwable` value.

Applications should throw instances of this class to indicate other illegal uses of the `null` object.

Direct instances of this exception class are not bound to any context and can be passed between contexts without any restrictions. Objects created and returned by the methods of this class are owned by the caller. In particular, a call to the `Throwable.getMessage()` returns a String instance bound to the owner context of the caller.

See Runtime Environment Specification for the Java Card Platform, Connected Edition, chapter 7 for details regarding transfer of ownership.

Since:
  JDK1.0, CLDC 1.0, Java Card 3.0

Constructor Summary
`NullPointerException()` Constructs a `NullPointerException` with no detail message.
`NullPointerException(String s)` Constructs a `NullPointerException` with the specified detail message.

Method Summary

Methods inherited from class java.lang.Throwable
`getMessage, printStackTrace, toString`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### NullPointerException

    public NullPointerException()

  Constructs a `NullPointerException` with no detail message.

### NullPointerException

    public NullPointerException(String s)

  Constructs a `NullPointerException` with the specified detail message.

  Parameters:
    `s` - the detail message.

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Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.