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In java, Which of the following is the more "accepted" way of dealing with possibly null references? note that a null reference does not always indicate an error...
if (reference == null) {
//create new reference or whatever
}
else {
//do stuff here
}
or
try {
//do stuff here
}
catch (NullPointerException e) {
//create new reference or whatever
}
547
In Java, the java. lang. NullPointerException is thrown when a reference variable is accessed (or de-referenced) and is not pointing to any object. This error can be resolved by using a try-catch block or an if-else condition to check if a reference variable is null before dereferencing it.
In Java programming, null can be assigned to any variable of a reference type (that is, a non-primitive type) to indicate that the variable does not refer to any object or array.
It is a good idea to check for null explicitly because: You can catch the error earlier. You can provide a more descriptive error message.
You can also throw a NullPointerException in Java using the throw keyword.
Catching exceptions is relatively expensive. It's usually better to detect the condition rather than react to it.
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