The lowest-level programming language (except for computers that utilize programmable
microcode) Machine languages are the only languages understood by computers. While
easily understood by computers, machine languages are almost impossible for humans to
So why do the GUI component classes have a prefix J? Instead of JButton, why not
name it simply Button? In fact, there is a class already named Button in the java.awt
When Java was introduced, the GUI classes were bundled in a library known
Sometimes there may be two or more possible matches for an invocation of a
method, but the compiler cannot determine the most specific match. This is referred
to as ambiguous invocation. Ambiguous invocation is a compilation error.
The String class repres
The get(int field) method defined in the Calendar class is useful to extract the date
and time information from a Calendar object. The fields are defined as constants, as
shown in the following.
Reference Introduction to Java Programming page 570.