Convert Raw Types to Generics refactoring

Last modified: 29 November 2022

The Convert Raw Types to Generics refactoring is designed to transform existing code that does not use Generics, into the Generics-aware code. The refactoring analyzes existing code, and for each raw type creates safe and consistent parameter type.

Example

IntelliJ IDEA tries to generate code, which is as correct as possible from the Java point of view. In other words, each context introduces some type restrictions, and the refactoring produces the best possible type (in our case <String>) that does not contradict with the existing contexts.

Before

After

public void method() {
    List list = new LinkedList();
    list.add("string");
}
public void method() {
    List<String> list = new LinkedList<String>();
    list.add("string");
}

See also

Reference