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18 This page generated: <strong>June 8 2004</strong></td></tr></tbody></table><table border="0" width="100%" cellspacing="0" cellpadding="5"><tr><td><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">4.3.3. Indentation</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="whitespace.html">Prev</a> </td><th width="60%" align="center">4.3. Printer</th><td width="20%" align="right"> <a accesskey="n" href="wrapping.html">Next</a></td></tr></table><hr></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="indentation"></a>4.3.3. Indentation</h3></div></div><div></div></div><p>
19 Controls the indentation settings.
20 <a class="indexterm" name="d0e2107"></a>
21 </p><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="indentation-general"></a>4.3.3.1. General</h4></div></div><div></div></div><p>Lets you change the general indentation settings.</p><div class="sect4" lang="en"><div class="titlepage"><div><div><h5 class="title"><a name="indentation-policy"></a>4.3.3.1.1. Policy</h5></div></div><div></div></div><p>
22 Lets you choose the way lines should be indented.
23 </p><div class="itemizedlist"><ul type="disc"><li><p><a name="indentation-policy-standard"></a>
26 With standard indentation, lines will be indented according to the
27 current indentation level (Note that the indentation level changes as the block
28 or parentheses level changes).
29 </p><div class="example"><a name="indentation-method-decl-standard"></a><p class="title"><b>Example 4.30. Method declaration (standard indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
30 public void severalParameters(String one, int two, String three,
31 StringObject four, AnotherObject five) {
34 </pre></td></tr></table></div><p></p><div class="example"><a name="indentation-method-call-standard"></a><p class="title"><b>Example 4.31. Method Call (standard indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
35 vector.add(new AppServerReference(
36 "RemoteApplicationManager",
37 poa.create_reference_with_id("RemoteApplicationManager".getBytes(),
38 RemoteApplicationManagerHelper.id())));
39 </pre></td></tr></table></div><p></p><div class="example"><a name="indentation-assign-standard"></a><p class="title"><b>Example 4.32. Assignment (standard indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
40 doublette[InteressentenPflegeController.GEBURTSDATUM] = versichertenResultSetRow[i].field[0]
41 .substring(0, 2) + "."
42 + versichertenResultSetRow[i].field[0].substring(2, 4) + "."
43 + versichertenResultSetRow[i].field[0].substring(4, 6);
44 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-policy-deep"></a>
47 Deep indentation means that lines will be indented relative to the current
48 parentheses or assignment offset. This way consecutive code sections are somewhat easier
49 to recognize at the downside of consuming more horizontal space.
50 </p><div class="example"><a name="indentation-method-decl-deep"></a><p class="title"><b>Example 4.33. Method declaration (deep indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
51 public void severalParameters(String one, int two, String three,
52 StringObject four, AnotherObject five) {
55 </pre></td></tr></table></div><p></p><div class="example"><a name="indentation-method-call-deep"></a><p class="title"><b>Example 4.34. Method Call (deep indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
57 new GridBagLayout(0, 1, 2, 1, 0.0, 0.0,
58 GribBagConstraints.WEST,
59 GribBagConstraints.NONE,
60 new Insets(0, GribBagConstraints.WEST,
61 GribBagConstraints.WEST,
62 GribBagConstraints.WEST), 0, 0));
63 </pre></td></tr></table></div><p></p><div class="example"><a name="indentation-assign-deep"></a><p class="title"><b>Example 4.35. Assignment (deep indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
64 doublette[Controller.GEBURTSDATUM] = versichertenResultSetRow[i].field[0]
65 .substring(0, 2) + "."
66 + versichertenResultSetRow[i].field[0]
69 + versichertenResultSetRow[i].field[0]
71 </pre></td></tr></table></div><p></p></li></ul></div></div><div class="sect4" lang="en"><div class="titlepage"><div><div><h5 class="title"><a name="indentation-sizes"></a>4.3.3.1.2. Sizes</h5></div></div><div></div></div><a class="indexterm" name="d0e2171"></a><p>
72 Lets you set different indentation sizes.
73 </p><div class="itemizedlist"><p></p><ul type="disc"><li><p><a name="indentation-sizes-general"></a>
75 <a class="indexterm" name="d0e2182"></a>
77 Specifies the number of spaces to use for general indentation (Studies have
78 found that 2 to 4 spaces for indentation is optimal)
79 </p><div class="example"><a name="ex-indentation-two-space"></a><p class="title"><b>Example 4.36. 2 space general indent</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
80 public class Preferences
82 ->private Preferences()
86 ->public static void main(String[] argv)
88 ->->de.hunsicker.jalopy.swing.PreferencesDialog.main(argv);
91 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-four-space"></a><p class="title"><b>Example 4.37. 4 space general indent</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
92 public class Preferences
94 --->private Preferences()
98 --->public static void main(String[] argv)
100 --->--->de.hunsicker.jalopy.swing.PreferencesDialog.main(argv);
103 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-sizes-leading"></a>
105 <a class="indexterm" name="d0e2207"></a>
107 Specifies the number of spaces to prepend before every line printed.
108 </p><div class="example"><a name="ex-indentation-six-leading"></a><p class="title"><b>Example 4.38. 6 space leading indent</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
109 ----->public class Preferences
111 -----> private Preferences()
115 -----> public static void main(String[] argv)
117 -----> de.hunsicker.jalopy.swing.PreferencesDialog.main(argv);
120 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-sizes-continuation"></a>
122 <a class="indexterm" name="d0e2226"></a>
124 Specifies the number of spaces that should be inserted in front of
125 continuation lines, i.e. the consecutive lines in case of a line wrap.
126 </p><div class="example"><a name="ex-indentation-two-continuation"></a><p class="title"><b>Example 4.39. 2 space continuation indent</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
127 if ((condition1 && condition2)
128 ->|| (condition3 && condition4)
129 ->|| !(condition5 && condition6)) {
130 doSomethingAboutIt();
132 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-four-continuation"></a><p class="title"><b>Example 4.40. 4 space continuation indent</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
133 if ((condition1 && condition2)
134 --->|| (condition3 && condition4)
135 --->|| !(condition5 && condition6)) {
136 doSomethingAboutIt();
138 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-sizes-trailing"></a>
139 Trailing comment indent
140 <a class="indexterm" name="d0e2251"></a>
141 <a class="indexterm" name="d0e2259"></a>
142 <a class="indexterm" name="d0e2265"></a>
144 Specifies the number of spaces to insert between trailing comments and the
146 </p><div class="example"><a name="ex-indentation-three-trailing"></a><p class="title"><b>Example 4.41. 3 space trailing comment indent</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
148 "Sunday",-->// Sunday
149 "Monday",-->// Monday
150 "Tuesday",-->// Tuesday
151 "Wednesday",-->// Wednesday
152 "Thursday",-->// Thursday
153 "Friday",-->// Friday
154 "Saturday"-->// Saturday
156 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-sizes-tab"></a>
159 Specifies the original tabular size of the source code. Some indentations
160 or alignments may fail, if you miss the correct size here.
161 <a class="indexterm" name="d0e2282"></a>
162 <a class="indexterm" name="d0e2288"></a>
163 </p></li><li><p><a name="indentation-sizes-extends"></a>
166 If enabled, specifies the whitespace to print before the <tt class="classname">extends</tt>
167 keyword in case it was printed on a new line.
168 </p><a class="indexterm" name="d0e2304"></a><div class="example"><a name="d0e2311"></a><p class="title"><b>Example 4.42. extends indentation with 6 spaces</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
169 public interface Channel
170 ------>extends Puttable, Takable
174 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-sizes-implements"></a>
177 Specifies the whitespace to print before the <tt class="classname">implements</tt>
178 keyword in case it was printed on a new line.
179 </p><a class="indexterm" name="d0e2325"></a><div class="example"><a name="d0e2332"></a><p class="title"><b>Example 4.43. implements indentation with 8 spaces</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
180 public class SynchronizedBoolean
181 ------->implements Comparable, Cloneable
185 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-sizes-throws"></a>
188 Specifies the whitespace to print before the <tt class="classname">throws</tt>
189 keyword in case it was printed on a new line.
190 <a class="indexterm" name="d0e2346"></a>
191 </p><div class="example"><a name="d0e2354"></a><p class="title"><b>Example 4.44. throws indentation with 3 spaces</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
192 private static final File getDestinationFile(File dest, String packageName,
194 -->throws IOException, FooException
198 </pre></td></tr></table></div><p></p></li></ul></div></div></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="indentation-misc"></a>4.3.3.2. Misc</h4></div></div><div></div></div><div class="itemizedlist"><ul type="disc"><li><p><a name="indentation-misc-tab"></a>
200 <a class="indexterm" name="d0e2369"></a>
202 Normally, Jalopy uses spaces to indent lines. If you prefer tabs, check this box.
204 Indent "case" from "switch"
206 The Sun Java code convention recommends a switch style where case statements
207 are not indented relative to the switch statement as a whole. However, this
208 option allows you to indent the case statements to make the entire switch
210 </p><div class="example"><a name="ex-indentation-misch-switch-un"></a><p class="title"><b>Example 4.45. Switch statement (unindented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
213 case Priority.ERROR_INT :
214 case Priority.FATAL_INT :
218 case Priority.WARN_INT :
226 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-misc-switch"></a><p class="title"><b>Example 4.46. Switch statement (indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
229 --->case Priority.ERROR_INT :
230 --->case Priority.FATAL_INT :
231 ---> color = Color.red;
234 --->case Priority.WARN_INT :
235 ---> color = Color.blue;
239 ---> color = Color.black;
242 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-misc-label"></a>
244 <a class="indexterm" name="d0e2397"></a>
246 Specifies whether lables should be indented with the current indentation level.
247 </p><div class="example"><a name="ex-indentation-misc-label-unindent"></a><p class="title"><b>Example 4.47. Unindented label</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
248 // advance to the first CLASS_DEF or INTERFACE_DEF
249 <span class="bold"><b>LOOP</b></span>:
250 for (AST child = tree.getFirstChild();
252 child = child.getNextSibling())
254 switch (child.getType())
256 case JavaTokenTypes.CLASS_DEF :
257 case JavaTokenTypes.INTERFACE_DEF :
264 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-misc-label"></a><p class="title"><b>Example 4.48. Indented label</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
265 // advance to the first CLASS_DEF or INTERFACE_DEF
266 <span class="bold"><b>LOOP</b></span>:
267 for (AST child = tree.getFirstChild();
269 child = child.getNextSibling())
271 switch (child.getType()) {
272 case JavaTokenTypes.CLASS_DEF :
273 case JavaTokenTypes.INTERFACE_DEF :
281 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-misc-first-column"></a>
282 Indent first column comments
284 Normally, all comments will be indented relative to their position in the code
285 to avoid that comments break the logical structure of the program. Some
286 developers may like to disable the indentation for first column comments
287 during the developing phase.
288 </p><div class="example"><a name="ex-indentation-misc-first-column"></a><p class="title"><b>Example 4.49. First column comment (indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
289 public static Printer create(AST node)
292 <span class="bold"><b>/*
295 return new NullPrinter();
298 return create(node.getType());
300 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-misc-first-column-unindented"></a><p class="title"><b>Example 4.50. First column comment (unindented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
301 public static Printer create(AST node)
304 <span class="bold"><b>/*
307 return new NullPrinter();
310 return create(node.getType());
312 </pre></td></tr></table></div><p></p></li></ul></div></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="indentation-align"></a>4.3.3.3. Align</h4></div></div><div></div></div><a class="indexterm" name="d0e2450"></a><a class="indexterm" name="d0e2455"></a><div class="itemizedlist"><ul type="disc"><li><p><a name="indentation-align-ident"></a>
315 If enabled, aligns the identifiers of variable declarations.
316 </p><a class="indexterm" name="d0e2464"></a><div class="example"><a name="ex-indentation-misc-align-ident"></a><p class="title"><b>Example 4.51. Variable identifiers</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
317 String text = "text";
319 History.Entry entry = new History.Entry(text);
320 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-align-ident-aligned"></a><p class="title"><b>Example 4.52. Variable identifiers (aligned)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
321 String text = "text";
323 History.Entry entry = new History.Entry(text);
324 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-align-assign"></a>
327 If enabled, aligns the assignment parts of variable declarations or, surprise, assignments.
328 </p><a class="indexterm" name="d0e2488"></a><a class="indexterm" name="d0e2495"></a><div class="example"><a name="ex-indentation-align-assign-aligned"></a><p class="title"><b>Example 4.53. Variable assignments (aligned)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
329 String text = "text";
331 History.Entry entry = new History.Entry(text);
332 </pre></td></tr></table></div><p>
333 If both variable alignment options are enabled, you can achieve a style like
335 </p><div class="example"><a name="ex-indentation-align-both"></a><p class="title"><b>Example 4.54. Variable identifiers/assignments (both aligned)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
336 String text = "text";
338 History.Entry entry = new History.Entry(text);
339 </pre></td></tr></table></div><p>
341 </p></li><li><p><a name="indentation-align-params"></a>
342 Method Def parameters
344 If enabled, aligns the parameters of method declarations. This only applies if
345 all parameters will be wrapped; either because wrapping is forced or the
346 max. line length is reached. To force aligning, you have to enable the
347 wrapping for method parameters (See <a href="wrapping.html#wrap-method-params">Method Def parameters</a>).
348 </p><a class="indexterm" name="d0e2524"></a><a class="indexterm" name="d0e2527"></a><div class="example"><a name="ex-indentation-align-params"></a><p class="title"><b>Example 4.55. Method declaration parameters</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
349 public static File create(final File file,
355 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-align-params-aligned"></a><p class="title"><b>Example 4.56. Method declaration parameters (aligned)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
356 public static File create(final File file,
362 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-align-method-chains"></a>
365 If disabled, indentation happens according to the current indentation level.
366 </p><div class="example"><a name="ex-indentation-align-call"></a><p class="title"><b>Example 4.57. Method Call chain (standard indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
367 Fachschluesselerzeugung.createService()
368 .getNeuerFachschluesselServiceService(
369 FachschluesselerzeugungService.FACHSCHLUESSEL_KZ_INTERESSENT);
370 </pre></td></tr></table></div><p>
371 Otherwise indentation is performed relative to the column offset of the first chain link.
372 </p><div class="example"><a name="ex-indentation-align-call-aligned"></a><p class="title"><b>Example 4.58. Method Call chain (aligned)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
373 Fachschluesselerzeugung.createService()
374 .getNeuerFachschluesselServiceService(
375 FachschluesselerzeugungService.FACHSCHLUESSEL_KZ_INTERESSENT);
376 </pre></td></tr></table></div><p></p></li><li><p><a name="indentation-align-ternary"></a>
379 If disabled, ternary expressions are printed according to the current
380 <a href="indentation.html#indentation-policy" title="4.3.3.1.1. Policy">indentation policy</a>.
381 </p><div class="example"><a name="ex-indentation-ternary-standard"></a><p class="title"><b>Example 4.59. Ternary operators (standard indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
382 alpha = (aLongBooleanExpression) ? beta |
384 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-ternary-deep"></a><p class="title"><b>Example 4.60. Ternary operators (deep indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
385 alpha = (aLongBooleanExpression) ? beta |
387 </pre></td></tr></table></div><p>
388 If enabled, the second operator will always be aligned relative to the first one.
389 </p><div class="example"><a name="ex-indentation-ternary-align"></a><p class="title"><b>Example 4.61. Ternary expresssions (aligned)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
390 alpha = (aLongBooleanExpression) ? beta |
392 </pre></td></tr></table></div><p>
393 Note that this switch only takes affect, if indeed a line break was inserted
394 before the second expression. You can force such line breaks with the
395 <a href="wrapping.html#wrap-ternary-colon">Wrap always before ternary expression colon</a> setting.
396 </p></li></ul></div><p></p></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="indentation-continuation"></a>4.3.3.4. Continuation</h4></div></div><div></div></div><a class="indexterm" name="d0e2597"></a><a class="indexterm" name="d0e2602"></a><p>
397 Lets you specify extra indentation for consectutive lines of certain expressions.
398 </p><div class="itemizedlist"><ul type="disc"><li><p><a name="indentation-misc-continuation-if"></a>
401 The Sun brace style could make seeing the statement body difficult. To
402 workaround this problem, you may want to use continuation indentation in case you like this
403 brace style. This setting applies for <tt class="literal">if</tt>, <tt class="literal">for</tt>, <tt class="literal">while</tt>
404 and <tt class="literal">do-while</tt> blocks.
405 </p><div class="example"><a name="ex-indentation-misc-non-continuation"></a><p class="title"><b>Example 4.62. Non-continuation indentation</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
406 if ((condition1 && condition2)
407 || (condition3 && condition4)
408 || !(condition5 && condition6)) { // BAD WRAPS
409 doSomethingAboutIt(); // MAKE THIS LINE EASY TO MISS
411 </pre></td></tr></table></div><p></p><div class="example"><a name="ex-indentation-misc-contiunation"></a><p class="title"><b>Example 4.63. Continuation indentation</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
412 if ((condition1 && condition2)
413 || (condition3 && condition4)
414 || !(condition5 && condition6)) {
415 doSomethingAboutIt();
417 </pre></td></tr></table></div><p>
418 Refer to <a href="printer.html#braces-style-styles" title="4.3.1.1.1. Styles">Section 4.3.1.1.1, “Styles”</a> for the available brace style options.
419 </p></li><li><p><a name="indentation-misc-ternary-if-else"></a>
422 If enabled, indentation will be increased before an operand will be printed.
423 </p><div class="example"><a name="ex-indentation-misc-ternary-if-else"></a><p class="title"><b>Example 4.64. Ternary expression (deep indented)</b></p><table border="0" bgcolor="#E0E0E0" class="shade"><tr><td><pre class="programlisting">
424 String comma = spaceAfterComma
427 </pre></td></tr></table></div><p></p></li></ul></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="whitespace.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="printer.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="wrapping.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">4.3.2. White Space </td><td width="20%" align="center"><a accesskey="h" href="manual.html">Home</a></td><td width="40%" align="right" valign="top"> 4.3.4. Wrapping</td></tr></table></div></td></tr></table></td></tr><tr><td bgcolor="#eeeecc" height="17" style="font-size:9px;padding-left:5px"><a href="#toppage">to top</a></td></tr><tr><td height="30"><br></td></tr><tr><td height="3"></td></tr><tr><td bgcolor="#336699" height="1"></td></tr><tr><td height="1"></td></tr><tr><td bgcolor="#336699" height="16"></td></tr><tr><td bgcolor="#ff9966" height="4"></td></tr><tr><td class="footer" align="center" height="15" valign="middle">
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