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Appendix B:
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Since Java is a programming language, the SCJA exam focuses on many of the packages and classes within the core Java SE and Java EE platform distributions. Table B-1 details the Java SE packages and classes covered on the exam. Table B-2 details the Java EE packages and classes covered on the exam.
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Learning the low-level details of all the common Java packages is not needed to perform well on the SCJA exam. To a large extent, just knowing what the packages are designed for and what type of functionality they contain will help you achieve a high score. However, you only need to know a limited number of Java SE classes. These are accompanied by asterisks in Table B-1.
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tAblE b-1
SCJA Exam: Java SE Packages and Classes
Name
Java Applet API Java AWT API
Package Name
java.applet java.awt
Commonly Used Classes and Interfaces
Applet Button, CheckBox, Component, Label, Frame, Panel, TextArea, TextField,
11 1
and so on
Java Basic I/O API
java.io
File, FileDescriptor, FilenameFilter, RandomAccessFile, as well as Reader, Writer, and their subclasses Connection, Statement, SQLException Byte, *Boolean, *Character, Double, *Float, *Integer, Short CharSequence, *String, StringBuffer, StringBuilder
Java Database Connectivity (JDBC) API Java Language API
java.sql and javax.sql java.lang
10 4 3 10 1
Java Naming and Directory Interface (JNDI) API Java Networking API
javax.naming java.net and javax.net
Context, InitialContext, NamingException Socket, ServerSocket, URL, Inet4Address
SCJA Covered Packages and Classes
tAblE b-1
SCJA Exam: Java SE Packages and Classes (Continued)
Name
Java Utilities API
Package Name
java.util
Commonly Used Classes and Interfaces
Date, Calendar, TimeZone, Locale, Currency, Random, StringTokenizer, Timer Remote, RemoteException, RemoteObject, RemoteServer, UnicastRemoteObject, Naming JButton, JCheckBox, JComponent, JLabel, JFrame, JPanel, JTextArea, JTextField, and so on
Java Remote Method Invocation (RMI) API Java Swing API
java.rmi and javax.rmi javax.swing
Java EE Packages and Classes
Java EE exam coverage emphasizes the formal names of the packages and what functionality they contain. You may not see references to the package names and/or class names at all. There is value added in conceptualizing how the technologies are organized within specified packages. Table B-2 provides this information. Be aware that many of the technologies have subpackages related to the listed packages. These subpackages are not listed in the table.
tAblE b-2
Name
Enterprise JavaBeans (EJB) API Java API for XML-Based RPC (JAX-RPC) API Java Message Service (JMS) API Java Servlet API Java Web Services JavaMail API JavaServer Pages (JSP) API
Package Name
javax.ejb javax.xml.rpc javax.jms javax.servlet Web Services Developer Pack (WSDL) javax.mail javax.servlet.jsp
12 12 10 12 10 12 12
SCJA Exam: Java EE Packages and Classes
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Unicode Standard
Appendix C:
Unicode Standard
Unicode Standard Compliancy
The Unicode Standard is a character coding system designed to form a universal character set. This standard is maintained by the Unicode Consortium standards organization. The characters in this set are technically known as Unicode scalar values (in other words, hex numbers). Commonly known as Unicode characters, the characters are primarily organized into symbol and punctuation characters, as well as by script characters (for example, spoken language characters). Code charts are maintained by the consortium for easy reference. The Code Charts for Symbols and Punctuation can be accessed at the following web site address: http://unicode.org/charts/symbols.html. The Unicode Character Code Charts by Script can be accessed from http://unicode.org/charts/index.html. The Java SE 6 and J2SE 5.0 API s character information is based on the Unicode standard, version 4.0. The J2SE 1.4 API s character information is based on the Unicode standard, version 3.0. This Unicode compliancy information is found in the documentation of the Character class. Many Unicode standard groupings of characters exist, such as language characters, currency symbols, Braille patterns, arrows, and mathematical operators. The most commonly used characters are the ASCII punctuation characters.
ASCII Punctuation Characters
The first 128 characters are the same as those in the American Standard Code for Information Exchange (ASCII) character set. The Unicode Consortium references them as ASCII punctuation characters. Table C-1 represents these characters. The values \u0000 \u001F, and 0007F represent nonprintable ASCII characters. The values \u0020 \u007E represent printable ASCII characters. The character \u0020 represents a blank space. As an example, the space could also be referenced by its decimal equivalent value (that is, 32), its octal equivalent value (040), its HTML equivalent value ( ), or directly by its printable character, as in char c = ' ';.
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