26 package java.lang;
  27 
  28 /**
  29  * Thrown when an application attempts to use {@code null} in a
  30  * case where an object is required. These include:
  31  * <ul>
  32  * <li>Calling the instance method of a {@code null} object.
  33  * <li>Accessing or modifying the field of a {@code null} object.
  34  * <li>Taking the length of {@code null} as if it were an array.
  35  * <li>Accessing or modifying the slots of {@code null} as if it
  36  *     were an array.
  37  * <li>Throwing {@code null} as if it were a {@code Throwable}
  38  *     value.
  39  * </ul>
  40  * <p>
  41  * Applications should throw instances of this class to indicate
  42  * other illegal uses of the {@code null} object.
  43  *
  44  * {@code NullPointerException} objects may be constructed by the
  45  * virtual machine as if {@linkplain Throwable#Throwable(String,
  46  * Throwable, boolean) suppression were disabled}.

  47  *
  48  * @author  unascribed
  49  * @since   JDK1.0
  50  */
  51 public
  52 class NullPointerException extends RuntimeException {
  53     private static final long serialVersionUID = 5162710183389028792L;
  54 
  55     /**
  56      * Constructs a {@code NullPointerException} with no detail message.
  57      */
  58     public NullPointerException() {
  59         super();
  60     }
  61 
  62     /**
  63      * Constructs a {@code NullPointerException} with the specified
  64      * detail message.
  65      *
  66      * @param   s   the detail message.

  26 package java.lang;
  27 
  28 /**
  29  * Thrown when an application attempts to use {@code null} in a
  30  * case where an object is required. These include:
  31  * <ul>
  32  * <li>Calling the instance method of a {@code null} object.
  33  * <li>Accessing or modifying the field of a {@code null} object.
  34  * <li>Taking the length of {@code null} as if it were an array.
  35  * <li>Accessing or modifying the slots of {@code null} as if it
  36  *     were an array.
  37  * <li>Throwing {@code null} as if it were a {@code Throwable}
  38  *     value.
  39  * </ul>
  40  * <p>
  41  * Applications should throw instances of this class to indicate
  42  * other illegal uses of the {@code null} object.
  43  *
  44  * {@code NullPointerException} objects may be constructed by the
  45  * virtual machine as if {@linkplain Throwable#Throwable(String,
  46  * Throwable, boolean, boolean) suppression were disabled and/or the
  47  * stack trace was not writable}.
  48  *
  49  * @author  unascribed
  50  * @since   JDK1.0
  51  */
  52 public
  53 class NullPointerException extends RuntimeException {
  54     private static final long serialVersionUID = 5162710183389028792L;
  55 
  56     /**
  57      * Constructs a {@code NullPointerException} with no detail message.
  58      */
  59     public NullPointerException() {
  60         super();
  61     }
  62 
  63     /**
  64      * Constructs a {@code NullPointerException} with the specified
  65      * detail message.
  66      *
  67      * @param   s   the detail message.