Java™ Application Development on Linux - Dator

3.2 Fundamental Language Elements65permission in that directory (check the permissions with ls -ld .) then youcan run these commands:$ cd /usr/local/java$ unzip -q /tmp/j2sdk-1_4_2-doc.zipThere may be quite a pause (tens of seconds) while it unzips everything.The unzip command will spew out a huge list of filenames as it unpacks themunless you use the -q option (“quiet”) on the command line (which we did, toavoid all that). The files are all unzipped into a directory named docs. So nowyou can point your browser tofile:///usr/local/java/docs/api/index.htmlNow you have your own local copy for quick reference, regardless of howbusy the network or Sun’s Web site gets. Be sure to bookmark this page; you’llwant to reference it often. It’s your best source of information about all thestandard Java2 classes.3.2.3 StatementsThis section is not intended to be a formal presentation of Java syntacticelements. 3 Our purpose here is merely to show you the Java way to expresscommon programming constructs. You will find that these are fundamentallysimilar to the analogous statements in C and C++. For much more detail onthese subjects, see Chapter 3 of Thinking in Java by Bruce Eckel.Like C, Java has a very small set of statements. Most constructs are actuallyexpressions. Most operations are either assignments or method calls. Those fewstatements that are not expressions fall into two broad categories:• Conditional execution statements• Loop control statementsBy the way, you may have already noticed one of the two kinds ofcomments that Java supports. They are like the C/C++ comments—a pair ofslashes (//) marks a comment from there to the end of the line, and a block3. For those so inclined, Sun has a BNF language grammar (http://java.sun.com/docs/books/jls/second_edition/html/syntax.doc.html) on their Web site, and the Lewis andLoftus book, Appendix L, has a good set of syntax diagrams.