java - 在 IntelliJ IDEA 中导航到声明、类型声明、实现之间有什么区别？

Question

The official documentation 我不清楚如何提取它们之间的真正区别。有人可以举个例子或场景以便于理解吗？

Answer 1

考虑以下示例代码。您的光标位于 m.aMethod(); 中的 m 或同一行中的 aMethod 处。

Main.java

public class Main implements MyInterface {

  public static final void main(String args []) {
    MyInterface m = new Main();
//              ^1

    m.aMethod();
//  ^ Declarations will bring you to 1, the declaration of the variable (m)
//    Type Declaration will bring you to 2, the declaration of the type of the variable (MyInterface)
    m.aMethod();
//       ^ Declaration will bring you to 3, the declaration of the method in the type (MyInterface) of the variable
//         Implementation(s) will bring you to 4, the declaration of the method implementing the interface method
  }

  public void aMethod() {
//            ^4
  }
}

MyInterface.java

public interface MyInterface {
//               ^2
  public void aMethod();
//            ^3
}