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| <h1>Refactoring support</h1> |
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| <p>The goal of Java program refactoring is to make system-wide code changes without affecting the behavior of the |
| program. The Java tools provide assistance in easily refactoring code. |
| </p> |
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| <p>The refactoring tools support a number of transformations described in Martin Fowler's |
| book <span class="name">Refactoring: Improving the Design of Existing Code</span>, Addison Wesley |
| 1999, such as <span class="name">Extract Method</span>, <span class="name">Inline Local |
| Variable, etc.</span></p> |
| |
| <p>When performing a refactoring operation, you can optionally preview all |
| of the changes resulting from a refactoring action before you choose to carry them out. |
| When previewing a refactoring operation, you will be notified of potential |
| problems and will be presented with a list of the changes the |
| refactoring action will perform. If you do not preview a refactoring |
| operation, the change will be made in its entirety and any resultant |
| problems will be shown. If a problem is detected that does not allow |
| the refactoring to continue, the operation will be halted and a list of |
| problems will be displayed.</p> |
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| <p>Refactoring commands are available from the context menus of several Java views (e.g. Package Explorer, Outline) and editors. |
| Many "apparently simple" commands, such as <strong>Move</strong> and <strong>Rename</strong>, are |
| actually refactoring operations, since moving and renaming Java elements |
| often require changes in dependent files. |
| </p> |
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| <p><img width="159" height="27" src="../images/ngrelc.gif" alt="Related concepts" border="0"><br> |
| <a href="../concepts/concepts-1.htm">Java development tools (JDT)</a></p> |
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| <p><img border="0" width="159" height="27" src="../images/ngrelt.gif" alt="Related tasks"><br> |
| <a href="../tasks/tasks-80.htm">Refactoring</a><br> |
| <a href="../tasks/tasks-82.htm">Refactoring without preview</a><br> |
| <a href="../tasks/tasks-83.htm">Refactoring with preview</a><br> |
| <a href="../tasks/tasks-84.htm">Previewing refactoring changes</a><br> |
| <a href="../tasks/tasks-100.htm">Undoing a refactoring operation</a><br> |
| <a href="../tasks/tasks-101.htm">Redoing a refactoring operation</a><br> |
| </p> |
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| <p><img border="0" width="159" height="27" src="../images/ngrelr.gif" alt="Related reference"><br> |
| <a href="../reference/ref-menu-refactor.htm">Refactoring actions</a><br> |
| <a href="../reference/ref-117.htm">Refactoring wizard</a><br> |
| <a href="../reference/ref-23.htm">Refactoring preferences</a><br> |
| <a href="../reference/ref-154.htm">Extract Method Errors</a><br> |
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