Declaring Array of a class using JFrame in Java

Question

I am just getting started in Java and I'm having issues programming a login wich needs to use a Jframe. Here's the code:

 package tp_libreria; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class menu extends JFrame { private JTextField f_usuario, f_pass; private JButton b_ingreso; private String usuario = "java", pass = "entrar"; private Usuario[] usuarios = new Usuario[5]; usuarios[0] = new Usuario("admin", "admin"); public static void main(String args[]){ menu application = new menu(); application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); } } 

The problem is that I don't know where to initialize the array usuarios, it gives me the following error.

Cannot make a static reference to a non-static field usuarios

Here's the class code:

 package tp_libreria; class Usuario { private String usuario; private String pass; // constructor public Usuario(String usuario, String pass) { this.usuario = usuario; this.pass = pass; } // getter public String getUsuario() { return usuario; } public String getPass() { return pass; } // setter public void setUsuario(String usuario) { this.usuario = usuario; } public void setPass(String pass) { this.pass = pass; } } 

Answer 1

try this

public class menu extends JFrame {
   private JTextField f_usuario, f_pass;
   private JButton b_ingreso;
   private String usuario = "java", pass = "entrar";
   private Usuario[] usuarios = new Usuario[5];


    public static void main(String args[]) {
      menu application = new menu();
      application.usuarios[0] = new Usuario("admin", "admin");
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
   }
}