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for(;;)-for loop; while(true)-always true, etc.

Wrapped classes are classes that allow primitive types to be accessed as objects.

The sizeof operator is not a keyword in Java Programming.

When a task invokes its yield() method, it returns to the ready state. When a task invokes its sleep() method, it returns to the waiting state.

A transient variable is a variable that may not be serialized.

Unicode requires 16 bits and ASCII require 7 bits. Although the ASCII character set uses only 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 (non-local) inner class may be declared as public, protected, private, static, final, or abstract.

The Vector class in Java Programming provides the capability to implement a growable array of objects.

A protected method may only be accessed by classes or interfaces of the same package or by subclasses of the class in which it is declared.

When a thread terminates its processing, it enters the dead state.

Heavy weight components like Abstract Window Toolkit (AWT), depend on the local windowing toolkit. For example, java.awt.Button is a heavy weight component, when it is running on the Java platform for Unix platform, it maps to a real Motif button. In this relationship, the Motif button is called the peer to the java.awt.Button. If you create two Buttons, two peers and hence two Motif Buttons are also created. The Java platform communicates with the Motif Buttons using the Java Native Interface. For each and every component added to the application, there is an additional overhead tied to the local windowing system, which is why these components are called heavyweight.

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

An abstract method is a method whose implementation is deferred to a subclass in Java Programming.

static and a non-static inner class in Java Programming

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

javax.Swing package. All components in Swing, except JApplet, JDialog, JFrame and JWindow are lightweight components in Java Programming.

The Frame class extends Window to define a main application window that can have a menu bar.