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| Inferring type parameters for generic type references |
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| <h1> Inferring type parameters for generic type references </h1> |
| Eclipse can attempt to infer type parameters for all generic type references in a |
| class, package, or project. This is especially useful when migrating from Java 1.4 code |
| to Java 5.0 code, allowing you to automatically make use of the generic classes in |
| Java's collections API. |
| <ul> |
| <li> Open a class in the Java editor, or in a Java view, select a class, package, or project. </li> |
| <li> Do one of the following: |
| <ul> |
| <li> From the menu bar, select <strong>Refactor > Infer Generic Type Arguments</strong> or </li> |
| <li> From the pop-up menu, select <strong>Refactor > Infer Generic Type Arguments</strong> </li> |
| </ul> |
| </li> |
| </ul> |
| <p> |
| You will be given a dialog with two configurable options: |
| <ul> |
| <li><strong>Assume clone() returns an instance of the receiver type</strong> |
| Well-behaved classes generally respect this rule, but if you know that your |
| code violates it, uncheck the box.</li> |
| <li><strong>Leave unconstrained type arguments raw (rather than inferring <?>).</strong> |
| If there are no constraints on the elements of e.g. <code>ArrayList a</code>, unchecking this |
| box will cause Eclipse to still provide a wildcard parameter, replacing the reference with |
| <code>ArrayList<?> a</code>.</li> |
| </ul> |
| |
| Press <strong>OK</strong> or <strong>Preview</strong> to continue with the operation. |
| </p> |
| <p><strong>Note</strong>: It may in some cases be impossible to assign |
| consistent type parameters in a selection, or require deeper analysis |
| than Eclipse can perform. |
| </p> |
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