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<html><head><title></title></head><body bgcolor=#ffffff> <a href="CodeConvTOC.doc.html">[Contents]</a> <a href="CodeConventions.doc6.html">[Prev]</a> <a href="CodeConventions.doc8.html">[Next]</a> <hr><br> <a name="475"> </a><h2 align="center">8 - White Space</h2><a name="487"> </a><h3> 8.1 Blank Lines</h3><p><a name="476"> </a>Blank lines improve readability by setting off sections of code that are logically related.</p><p><a name="478"> </a>Two blank lines should always be used in the following circumstances:</p><ul><a name="477"> </a><li>Between sections of a source file<a name="479"> </a><li>Between class and interface definitions</ul><p><a name="480"> </a>One blank line should always be used in the following circumstances:</p><a name="485"> </a><ul><li>Between methods<a name="486"> </a><li>Between the local variables in a method and its first statement<a name="592"> </a><li>Before a block<a href="CodeConventions.doc4.html#680"> (see section 5.1.1)</a> or single-line<a href="CodeConventions.doc4.html#341"> (see section 5.1.2)</a> comment<a name="609"> </a><li>Between logical sections inside a method to improve readability</ul><a name="682"> </a><h3> 8.2 Blank Spaces</h3><p><a name="489"> </a>Blank spaces should be used in the following circumstances:</p><ul><a name="490"> </a><li>A keyword followed by a parenthesis should be separated by a space. Example:</ul><blockquote><pre> while (true) { ... }</pre></blockquote><ul><p>Note that a blank space should not be used between a method name and its opening parenthesis. This helps to distinguish keywords from method calls.<p></ul><ul><a name="493"> </a><li>A blank space should appear after commas in argument lists.<a name="3176"> </a><li>All binary operators except <code>.</code> should be separated from their operands by spaces. Blank spaces should never separate unary operators such as unary minus, increment ("++"), and decrement ("--") from their operands. Example:</ul><blockquote><pre> a += c + d; a = (a + b) / (c * d); while (d++ = s++) { n++; } printSize("size is " + foo + "\n");</pre></blockquote><ul><a name="496"> </a><li>The expressions in a <code>for</code> statement should be separated by blank spaces. Example:</ul><blockquote><pre> for (expr1; expr2; expr3)</pre></blockquote><ul><a name="498"> </a><li>Casts should be followed by a blank space. Examples: </ul><blockquote><pre> myMethod((byte) aNum, (Object) x); myMethod((int) (cp + 5), ((int) (i + 3)) + 1);</pre></blockquote><hr><br> <a href="CodeConvTOC.doc.html">[Contents]</a> <a href="CodeConventions.doc6.html">[Prev]</a> <a href="CodeConventions.doc8.html">[Next]</a> <hr><br><i><a href="Copyright.doc.html">Copyright</a> © 1995-1999, Sun Microsystems, Inc. All rightsreserved.</i><!-- Last updated: Thu Apr 15 09:03:50 1999 --></body></html>⌨️ 快捷键说明
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