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NullPointerException.javaAPI DocJava SE 5 API1380Fri Aug 26 14:57:02 BST 2005java.lang

NullPointerException

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.

author
unascribed
version
1.19, 12/19/03
since
JDK1.0

Fields Summary
Constructors Summary
public NullPointerException()
Constructs a NullPointerException with no detail message.

	super();
    
public NullPointerException(String s)
Constructs a NullPointerException with the specified detail message.

param
s the detail message.

	super(s);
    
Methods Summary