Can a Byte object be cast to a double value?
No, an object cannot be cast to a primitive value. Read more »
Archive for May, 2007
What value does read() return when it has reached the end of a file?
The read() method returns -1 when it has reached the end of a file. Read more »
What are the high-level thread states?
The high-level thread states are ready, running, waiting, and dead. Read more »
What is the relationship between the Canvas class and the Graphics class?
A Canvas object provides access to a Graphics object via its paint() method. Read more »
How are commas used in the initialization and iteration parts of a for statement?
Commas are used to separate multiple statements within the initialization and iteration parts of a for statement. Read more »
What is the advantage of the event-delegation model over the earlier event-inheritance model?
The event-delegation model has two advantages over the event-inheritance model. First, it enables event handling to be handled by objects other than the ones that... Read more »
Name two subclasses of the TextComponent class.
TextField and TextArea Read more »
What method is invoked to cause an object to begin executing as a separate thread?
The start() method of the Thread class is invoked to cause an object to begin executing as a separate thread. Read more »
Which Java operator is right associative?
The = operator is right associative. Read more »
What is the argument type of a program’s main() method?
A program’s main() method takes an argument of the String[] type. Read more »
What is the purpose of the finally clause of a try-catch-finally statement?
The finally clause is used to provide the capability to execute code no matter whether or not an exception is thrown or caught. Read more »
How many times may an object’s finalize() method be invoked by the garbage collector?
An object’s finalize() method may only be invoked once by the garbage collector. Read more »
Which Container method is used to cause a container to be laid out and redisplayed?
validate() Read more »
What is the GregorianCalendar class?
The GregorianCalendar provides support for traditional Western calendars. Read more »