Null pointer exception is an “exception ... they still need an address and a pointer. An example is String. This is not a primitive type in Java, but rather a reference type: in this case ...

The reason this can become a nuisance is that some methods in Java will actually force the user to handle exceptions. This is where “try catch ... Mistake A good example would be the ...

Some exceptions in Java must be handled in the developer's code. Other exceptions can occur without any exception handling semantics at all. When an exception must be handled with try-and-catch ...

For these reasons, Java requires your try blocks to actually throw the exceptions that their catch clauses catch. For example, if you were homesick for your old operating system and wrote the ...

Using abstract types frequently requires one to manually check types, cast to specific classes and handle potential null pointer exceptions ... Java language's evolution toward more expressive and ...