class is public should be declared in a file named.txt

Question

Problem:

When the class name and the filename of a given Java program doesn’t match I get this error. Considering an example where file name is bal.java:

public class Bal {

 public static void main(String[] args) 
{
            System.out.println("Hello, chutmarani!");
        }


}

1 error found :

File:bal.java [line 1]

Error: class Bal is public, should be declared in a file named bal.java

Can anyone help?

 

Answer 1

Since bal does not match with Bal, the code will not compile properly.
To fix this error kind of error, either we need to rename the file or change the class name as “bal.java”As the error message suggests, if we declare a class as public, It needs its bal.java file. If we don’t want to do that, we don’t define it as public.

Comments

That class name and Sysout string! Lol

Answer 2

Name of public class should match the name of .java file in which it is placed (like public class Foo{} should be placed in Foo.java file). So either:

• rename your file from Main.java to WeatherArray.java

• rename the class from public class WeatherArray { to public class Main {

The name of the public class inside a file has to be the similar as the name of that file.

Therefore in case your file declares class WeatherArray, it requires to be named WeatherArray.java

For example, I renamed my MainActivity class to MainnActivity just (!) in the code. I obtain this error instantly.

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

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

You called your file as Main.java. name your file as WeatherArray.java and compile.

Your file is called Main.java where it must be

WeatherArray.java

A Java file can just have 1 public class in it. The name of that public class should be the similar as the filename.

To the file MyClass.java must comprise a class MyClass that may or may not be public. However it should not comprise a public class with any other name.

Answer 3

Name of public class should match the name of .java file in which it is placed (like public class Foo{} should be placed in Foo.java file). So either:

• rename your file from Main.java to WeatherArray.java

• rename the class from public class WeatherArray { to public class Main {

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

Therefore in case your file declares class WeatherArray, it requires to be named WeatherArray.java

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

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

You called your file as Main.java. name your file as WeatherArray.java and compile.

Your file is called Main.java where it must be

WeatherArray.java

I had the similar problem however solved it at the time I convinced that I didn't compile it with the appropriate casing. You may have been doing

A Java file can just have 1 public class in it. The name of that public class should be the similar as the filename.

To the file MyClass.java must comprise a class MyClass that may or may not be public. however it should not comprise a public class with any other name.

From my comprehension for same question, the name of the file must be the similar as the public class, and at the time i alter the class name to R_2 (i refactored the filename to R_2.java from R 2.java), it throws this error.

error: invalid method declaration; return type required