Replacing ‘public’ with ‘private’ in “main” in Java
Last Updated :
21 Aug, 2018
Consider following Java program:
class GFG {
public static void main(String args[])
{
System.out.println( "GeeksforGeeks" );
}
}
|
GeeksforGeeks
Explanation:
1)public: It is an access specifier which allows the JVM(Java Virtual Machine) to access the main method from anywhere.
2)static: static keyword allows the JVM to access the main method without any instance(object).
3)void: It specifies that the main method doesn’t return anything.
4)main: name of the method(function) configured in JVM.
5)String args[]: Command line arguments.
Now, if we replace ‘public’ with ‘private’ in “public static void main”, the above code becomes:
class GFG {
private static void main(String args[])
{
System.out.println( "GeeksforGeeks" );
}
}
|
Explanation:
The above code will be compiled successfully, but will throw a runtime error as follows:
Error: Main method not found in class GFG, please define the main method as:
public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application
Click to view output
Reason: Since the access specifier was changed from “public” to “private” JVM was unable to access/locate the main method.
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