Class is public should be declared in a file named java как исправить

I am trying to write a program, but I’m getting this compiler error:

Main.java:1: error: class WeatherArray is public, should be declared in a file named WeatherArray.java
public class WeatherArray {
       ^
1 error

I have checked my file names, and my public class is the same as my .java file.

How can I fix this?

Here is my code:

public class WeatherArray {
    public static void main(String[] args) {
        // ...
    }
}

The name of the public class within a file has to be the same as the name of that file.

So if your file declares class WeatherArray, it needs to be named WeatherArray.java

answered Dec 10, 2012 at 23:25

This happens when you have 1 name for the Java class on hard disk and another name of Java class in the code!!

For example, I renamed my MainActivity class to MainnActivity only (!) in the code. I got this error immediately.

There is also a visual indicator in the Project tab of Android Studio — a class inside a class, like you have nested classed, but with an error indicator.

The solution is to simply rename class name in the Project tab (SHIFT + F6) to match the name in the Java code.

answered Jul 15, 2015 at 13:05

I had the same problem but solved it when I realized that I didn’t compile it with the correct casing. You may have been doing

javac Weatherarray.java

when it should have been

javac WeatherArray.java

answered Aug 27, 2019 at 20:57

answered Dec 10, 2012 at 23:26

your file is named Main.java where it should be

WeatherArray.java

answered Dec 10, 2012 at 23:27

Yes! When you face these type of problem then try to following points

• Check Your .java file name and class name.
• If Class name and public class name are not the same then RENAME class name.

answered Jan 30, 2018 at 22:04

To avoid this error you should follow the following steps:

1) You should make a new java class

2) Name that class

3) And a new java class is made

answered May 3, 2018 at 16:18

In my case (using IntelliJ) I copy and pasted and renamed the workspace, and I am still using the old path to compile the new project.

In this case this particular error will happen too, if you have the same error you can check if you have done the similar things.

answered Jul 16, 2018 at 4:42

The terminal is not case sensitive when writing «Javac [x].java», so make sure what you write in the terminal matches the filename and class name.

My class name and file name were both «MainClass», but I was compiling using «Mainclass». Notice I forgot to make the «c» capital.

answered Jan 25, 2019 at 15:21

From Ubuntu command line:

//WeatherArray.java
public class WeatherArray {
  public static void main(String[] args) {
    System.out.println("....Hello World");
}}

ls

WeatherArray.java

javac WeatherArray.java

ls

WeatherArray.java WeatherArray.class

java WeatherArray

….Hello World

Of course if you name your java file with different name than WeatherArray, you need to take out public and it would be:

// Sunny.java
class WeatherArray {
   public static void main(String[] args) {
      System.out.println("....Hello World"); }}
// javac Sunny.java; java WeatherArray

If you make WeatherArray class from public to default.

public class WeatherArray =====> class WeatherArray

then you do not get any error and
you can easily compile your code by just writing

==> javac any_name_you_assign_to_file.java

Now a WeatherArray.class will generate.

To run your code you have to use class name

==> java WeatherArray

answered Jun 30, 2021 at 19:47

Compile WeatherArray.java instead of Main.java

This error comes if you have not saved your source code with the same name of your public class name.

answered Jul 13, 2021 at 13:01

If your class name is the same as the filename then check that it does not contain any zero width character

I accidentally copied a class name with invisible whitespace which caused this exception

Eclipse was able to build the file and Gradle was not

This can be very confusing

answered Sep 11, 2021 at 20:50

The answer is quite simple. It lies in your admin rights. before compiling your java code you need to open the command prompt with run as administrator. then compile your code. no need to change anything in your code. the name of the class need to be the same as the name of the java file.. that’s it!!

when you named your file WeatherArray.java,maybe you have another file on hard disk ,so you can rename WeatherArray.java as ReWeatherArray.java, then rename ReWeatherArray.java as WeatherArray.java. it will be ok.

R. D.

Причина написана в сообщении: «class Main is public, should be declared in a file named Main.java»
Ваш файл называется main.java, а должен называться Main.java

Юлий Афанасьев

Если рядом нет файла Main.java появляется подобное сообщение. Что делать? Win

Роман Черепанов

Переименуй main.java на Main.java