Extract Method
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| − | printOwing() { | + | Extracting a method consists of turning a fragment of a method into a method whose name explains the purpose of the method. This may need to be used in methods that show a large number of local variables within the scope of a method, to enhance comprehensibility and reduce complexity. If several of these local-scope variables are modified by the code extracted, [[Split Temporary Variable]] may also need to be used. |
| + | |||
| + | In cases where extracting a method is not feasible, replacing the method with a [[Method Object]] may be the next step. | ||
| + | |||
| + | ---- | ||
| + | '''Example:''' | ||
| + | |||
| + | printOwing() { | ||
printBanner(); | printBanner(); | ||
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printDetails(getOutstanding()); | printDetails(getOutstanding()); | ||
} | } | ||
| − | + | ||
void printDetails (double outstanding) { | void printDetails (double outstanding) { | ||
System.out.println ("name: " + _name); | System.out.println ("name: " + _name); | ||
System.out.println ("amount " + outstanding); | System.out.println ("amount " + outstanding); | ||
} | } | ||
| + | |||
| + | == See Also == | ||
| + | |||
| + | {{Refactoring}} | ||
Latest revision as of 03:23, 25 November 2010
Extracting a method consists of turning a fragment of a method into a method whose name explains the purpose of the method. This may need to be used in methods that show a large number of local variables within the scope of a method, to enhance comprehensibility and reduce complexity. If several of these local-scope variables are modified by the code extracted, Split Temporary Variable may also need to be used.
In cases where extracting a method is not feasible, replacing the method with a Method Object may be the next step.
Example:
printOwing() {
printBanner();
//print details
System.out.println ("name: " + _name);
System.out.println ("amount " + getOutstanding());
}
becomes
void printOwing() {
printBanner();
printDetails(getOutstanding());
}
void printDetails (double outstanding) {
System.out.println ("name: " + _name);
System.out.println ("amount " + outstanding);
}
See Also
