ASCII, Unicode, UTF-8 and UTF-16

Q

How many bits are used to represent Unicode, ASCII, UTF-16, and UTF-8 characters?

✍: FYIcenter

A

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.

2007-03-03, 7152👍, 0💬

Vector and ArrayList Classes
What is the main difference between a Vector and an ArrayList? Java Vector class is internally synchronized and ArrayList is not. 2007-03-03, 6219👍, 0💬

Garbage Collection
Does garbage collection guarantee that a program will not run out of memory? No, it doesn't. It is possible for programs to use up memory resources faster than they are garbage collected. It is also possible for programs to create objects that are not subject to garbage collection. 2007-03-03, 5478👍, 0💬

Component Subclasses in Swing Package
Name Component subclasses that support painting? The Canvas, Frame, Panel, and Applet classes support painting. 2007-03-03, 5365👍, 0💬

Wrapped Classes
What are wrapped classes? Wrapped classes are classes that allow primitive types to be accessed as objects. 2007-03-03, 5323👍, 0💬

Preemptive Scheduling
What is the difference between preemptive scheduling and time slicing? Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Under time slicing, a task executes for a predefined slice of time and the... 2007-03-03, 5185👍, 0💬

Modifiers on Inner Classes
What modifiers may be used with an inner class that is a member of an outer class? A inner class may be declared as public, protected, private, static, final, or abstract. 2007-03-03, 5068👍, 0💬

Protected Methods
If a method is declared as protected, where may the method be accessed? 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. 2007-03-03, 4920👍, 0💬

NullPointerException on String Objects
What can go wrong if you replace &emp;&emp; with &emp; in the following code: String a=null; if (a!=null && a.length()>10) { ... } A single ampersand here would lead to a NullPointerException. 2007-03-03, 4784👍, 0💬

Inner Class Declared inside a Method
Can an inner class declared inside of a method access local variables of this method? It's possible if these variables are final. 2007-03-03, 4767👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.