构造函数Object（String）未定义;对于eventHandling类型，方法setLayout是未定义的？

Question

import java.awt.*;      
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JOptionPane;                 


     public class EventHandling {

private JTextField paco;
private JTextField paco2;
private JTextField paco3;
private JPasswordField passwordField;

     public EventHandling(String s, String set ) {

            super("title");                             

            setLayout(new FlowLayout());


    }

}

所以我在“super（”title“）中得到了这个错误;” - 构造函数Object（String）未定义， 然后为“setLayout（new FlowLayout（））;” - 方法setLayout（FlowLayout）未定义类型EventHandling

Answer 1

public class EventHandling extends JFrame {

...