question about running java in Dcoder

Question

public class ExampleProgram {
public static void main(String[ ] args) {
System.out.println("Hello World");
}
}
I ran this code in Dcoder java ide,and got this output:source_file.java:1: error: class ExampleProgram is public, should be declared in a file named ExampleProgram.java
public class ExampleProgram {
^
1 error
I do save the file with the same name of the class "ExampleProgram",so did I miss something else to make it work.

Answer 1

OK,I found the answer,it should be
"class Dcoder" not "public class" ,not other class name in main

Answer 2

I saved the file as you said and it didn't work,then I intent to move the file from Dcoder work folder to somewhere like /sdcard in my phone for compiling it ,but it is not permitted

Answer 3

Save it as ExampleProgram.java this is the way it should work.