Extract method errors

• Selected block references a local type declared outside the selection

A local type declaration is not part of the selection but is referenced by one of the statements selected for extraction. Either extend the selection that it includes the local type declaration or reduce the selection that no reference to the local type declaration is selected.
 
• A local type declared in the selected block is referenced outside the selection

The selection covers a local type declaration but the type is also referenced outside the selected statements. Either extend the selection that is includes all references to the local type or reduce the selection that the local type declaration isn't selected.
 
• Ambiguous return value: selected block contains more than one assignment to local variable

More than one assignment to a local variable was found inside the selected block. Either reduce the selection that only one assignment is selected or extend the selection that at least all reference except of one to the local variables are covered by the selection too.
 
• Ambiguous return value: expression access to local and return statement selected

The selected statement generates more than one return value. This is for example the case if an expression is selected and an expression's argument is modified as well. To remedy this problem extend the selection to cover the read access of the modified argument as well.
 
• Selection contains a break statement but the corresponding break target isn't selected

To remedy the problem either extend the selection to include the break / continue target or reduce the selection that the break / continue statement isn't covered by the selection.
 
• Selection contains a continue statement but the corresponding continue target isn't selected

To remedy the problem either extend the selection to include the break / continue target or reduce the selection that the break / continue statement isn't covered by the selection.
 
• Cannot extract new method from selection. Only statements from the body of a top level method can be extracted

This is a generic error message shown whenever the selection does not spawn a valid set of statements. Typical scenarios where this error message is shown are:
• a whole method is selected not only parts of a method body
• the selection only covers parts of a statement. Statements in the extract method sense are separated by semicolons. Below a few examples where the selection doesn't mark a set of statements and therefore can't be extracted:
• foo().bar().baz();

to remedy the problem select whole message send chain
• int i= foo();

extend the selection to cover the whole declaration
The users can extend the selection to a valid range using the Expand Selection to in the Edit menu.
 
• Selection starts inside a comment

Parts of a comment cannot be extracted. Either extend the selection that it covers the whole comment or reduce the selection that the comment isn't covered at all.
 
• Selection ends inside a comment

Parts of a comment can't be extracted. Either extend the selection that it covers the whole comment or reduce the selection that the comment isn't covered at all.
 
• Cannot extract selection that ends in the middle of a statement

Adjust selection so that it fully covers a set of statements. Statements in the extract method sense are separated by semicolons.

Java development tools (JDT)

Refactoring support

Extracting a method

Using Structured Selection

Source menu

Refactor Menu