null pointer

The bindtextdomain() function returns the directory pathname currently bound to the domain. If it fails, null pointer will be returned.

I said earlier that an empty list is a LinkedList containing a null pointer in both fields.

Instead, the error signaled at run time would be a null-pointer exception instead of a class-cast exception.

Applying the indirection operator to a null pointer results in an implementation-defined behavior.

One approach to statically determining possible null-pointer exceptions is a technique known as set-based analysis.

Notice how like our recursive programs, the definition of a linked list also contains a base case -- in this case, the NULL pointer.

The first bug pattern relating to null-pointer exceptions that we'll explore is one that I call the Dangling Composite pattern.

Unfortunately, many designers have still not learnt that the special NULL pointer or null object is an equally bad idea.

Else, it goes through the binding vector array looking for a non-NULL pointer to binding handle.

Because null-pointer exceptions are more difficult to diagnose, this "fix" would actually decrease the quality of the code.

Clearly, SOAP separating is not the same as a null pointer.

Null pointer errors are usually the result of one or more programmer assumptions being violated.

Unfortunately, automata theory tells us that no tool could ever statically determine which programs will throw null-pointer exceptions.

Because FindBugs doesn't know if the map contains "bob" or not, it will flag line 5 as a possible null pointer exception.

In many null-pointer exceptions, the true bug occurs where the variable is actually assigned to null.

This marker is usually called the null value, the null list, or the null pointer.

Symptoms: Code that uses a recursively defined datatype is signaling a null-pointer exception.

Some types of memory access errors (like using a NULL pointer) cause a program to crash outright.

If the argument is a null pointer, all open files are flushed. The stream remains open after this call.

Null pointer dereference faults are popular in C program, fault-oriented static testing method should detect these faults well.

Furthermore, it says nothing about where in the code the null pointer was actually assigned.

Accessing the null pointer is very dangerous, as it might crash your program.

Who knows how far that null pointer was passed from method to method before it was ever dereferenced?

Instead of defining a separate class for empty lists, it represents empty lists by putting a null pointer in both fields.

That means a reference type can have a null pointer, but a value type cannot have a null value.

In this example, line 6 will cause a null pointer exception because the variable actions has not been initialized.

This code clips the parameters to allowable ranges, checks for a null pointer assignment, and so on.

in particular , we ll look into bug patterns that crop up as null pointer exceptions and discuss how to minimize their occurrence.

Option so that if there is any error in allocating memory, it does not throw an exception but rather returns a NULL pointer.

Instead, it places a null pointer into the field.

NULL is defined simply as a null pointer (0) because the null pointer is invalid as a pointer anyway.

Here's what results from dereferencing a NULL pointer on a PC running Version 2. 6 of the kernel.

Make sure you are not accessing null pointer.

Sun's JSF RI expects a renderer will send a null pointer exception if your component doesn't have a renderer.

This often happens if a handle is used after it has been freed, or if the handle is the null pointer.

it can detect defects that happen in lower probability such as memory leak and null pointer dereference.

The import wizard does not open, and a Null Pointer Exception message appears in the console

An approach to statically determining possible null-pointer exceptions is a technique known as

Null pointer dereference in method on exception path

A NULL pointer argument was passed