Cannot resolve method java ошибка

Lombok is a library that reduces boilerplate code when using the Java programming language. In comparison with modern script languages such as Python or Ruby, Java tends to be overly verbose: In order to create a class with a few attributes serving as a data object, one needs to create numerous getters and setters as well as custom equals and hashCode implementations. Of course, the Java IDE landscape has reacted to this kind of problem a long time ago by equipping IDE users with several ways to generate these methods on demand.

However, maintaining such data classes can still be hassle: Just imagine a programmer quickly adding one or more attributes to a data class because a new feature needs to be implemented that relies on those. They surely will remember to generate the getters and setters because otherwise they won’t be able to access the new attributes. They might miss to update the toString method or the equals and hashCode methods, though, and what gives? All tests might pass and everything could be fine for a while. But then a bug is discovered that either might be related to the equals method not reflecting the newly added attributes that could potentially lead to overwriting data entities in collections or a crucial log message does not give a programmer the values of the added attributes because the toString method has not been updated.

Lombok deals with these problems by generating getters, setters, constructors, useful toString methods as well as equals and hashCode implementations in the build process of your app. Integrating Lombok, say, in a Gradle build, is as easy as adding

compileOnly 'org.projectlombok:lombok'

to the dependencies of your build.gradle file. Afterwards, a data class may be written as follows:

import lombok.*;

@Data
@NoArgsConstructor
@RequiredArgsConstructor
class Account {
  private @NonNull String accNumber;
  private double saldo;
}

The annotation @Data gives you getters and setters for all attributes of your class as well as a toString, a hashCode and an equals implementation. The annotations @NoArgsConstructor and @RequiredArgsConstructor give you the standard constructor as well as a constructor with all the required fields (in this case, all fields annotated as @NonNull).

Задача ‘Friends&Family’
В строке с методом nextDouble () и nextInt (), выдаёт ошибку…

причём в разжовывании работы с сканером:

всё работет норм.

Дело в — do?! Но нет! Я вставил пример из пояснения и он выдал ту же ошибку! У меня явно чего-то не хватает в идее!

*одно хорошо, пока курил, много интересного прочёл…
** работают jdk1.8.0_231 и java jre1.8.0_231

cannot resolve method ‘getParameter(java.lang.String)’

Have you ever encountered this problem?

Originally using Myeclipse, and later using IDEA, various problems can not be solved, this problem is one of them.

It also has a brother problem:

cannot resolve method ‘println(java.lang.String)’

The above picture is a screenshot of the code after the solution.

Solution:

1. Empty the cache

Click «File»—->»Invalidate Caches / Restart» in the upper left corner

A dialog box pops up, click on «Invalidate».

If this method is not good, please see the second method.

2. Add tomcat

Click on «File» in the upper left corner——>Project Structure

In the new dialog box, click on «Modules»—->»+»—->»Library or Module Dependency..»

Pop up a dialog box, select tomcat——> click «Add Selected»

Click «Apply»—->»OK»

3, the alternate method

If it can’t be solved, try to return to Method 1: «File»—-> «Invalidate Caches / Restart»—-> pop-up dialog box, click «Invalidate and Restart».

OK, my problem has been solved at this time.

note:

Operating system: win7

JDK：1.6

tomcat：1.7

Browser: Charm

Programming tool: IDEA

Time to resolve: two days

Solution: First check the problem to find the cause, and then blindly modify the continuous trial and error, while the browser search for similar problems, and finally solve.