java - ERROR: "The method setDefaultCloseOperation(int) is undefined for the type eventMain"

Question

package test1;
import javax.swing.JFrame;

public class eventMain {
    public static void main (String[] args) {   
        eventMain evMainObject = new eventMain();
        evMainObject.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        evMainObject.setSize(350,100);
        evMainObject.setVisible(true);      
    }   
}

These are the errors that I get:

The method setDefaultCloseOperation(int) is undefined for the type eventMain

The method setSize(int, int) is undefined for the type eventMain

The method setVisible(boolean) is undefined for the type eventMain

question from:https://stackoverflow.com/questions/65923217/error-the-method-setdefaultcloseoperationint-is-undefined-for-the-type-event

Answer 1

Waitting for answers