Unicode requires 16 bits and ASCII require 7 bits. Although the ASCII character set usesonly 7 bits, it is usually represented as 8 bits. UTF-8 represents characters using 8, 16,and 18 bit patterns. UTF-16 uses 16-bit and larger bit patterns.

A task's priority is an integer value that identifies the relative order in which it should beexecuted with respect to other tasks. The scheduler attempts to schedule higher prioritytasks before lower priority tasks.

Most of the AWT-related events of the event-delegation model are defined in thejava.awt.event package. The AWTEvent class is defined in the java.awt package.

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 generate the events (or their containers). This allows a clean separation between a component's designand its use. The other advantage of the event-delegation model is that it performs muchbetter in applications where many events are generated....

A Java source code file takes the name of a public class or interface that is defined withinthe file. A source code file may contain at most one public class or interface. If a publicclass or interface is defined within a source code file, then the source code file must takethe name of the public class or interface. If no public class or interface is defined within asource code file, then the file...

A Canvas object provides access to a Graphics object via its paint() method.

An object's lock is a mechanism that is used by multiple threads to obtain synchronizedaccess to the object. A thread may execute a synchronized method of an object only afterit has acquired the object's lock. All objects and classes have locks. A class's lock isacquired on the class's Class object.

The elements of a BorderLayout are organized at the borders (North, South, East, andWest) and the center of a container.

An object reference be cast to an interface reference when the object implements thereferenced interface.

The fractional part of the result is truncated. This is known as rounding toward zero.

A catch clause can catch any exception that may be assigned to the Throwable type. Thisincludes the Error and Exception types.

An event-listener interface defines the methods that must be implemented by an eventhandler for a particular kind of event. An event adapter provides a default implementationof an event-listener interface.

During compilation, the values of each case of a switch statement must evaluate to avalue that can be promoted to an int value.

The elements of a GridBagLayout are organized according to a grid. However, theelements are of different sizes and may occupy more than one row or column of the grid.In addition, the rows and columns may have different sizes.

Java uses layout managers to lay out components in a consistent manner across allwindowing platforms. Since Java's layout managers aren't tied to absolute sizing andpositioning, they are able to accomodate platform-specific differences among windowingsystems.

The finally clause of the try-catch-finally statement is always executed unless the threadof execution terminates or an exception occurs within the execution of the finally clause.