Problems with JAVA constructor [duplicated]

I have problems with this code. I would have to login, but when I enter the username or user name string it does not identify the object I refer to and if it returns a false. I think there is a problem with the constructor attached to both codes.

public class usuario {
    static String nombre;
    static String tipo;
    static String pass;

    public usuario(String nombre_, String tipo_,String pass_) {
        this.nombre=nombre_;
        this.tipo=tipo_;
        this.pass=pass_;
    }

    public String getNombre() {
        return this.nombre;
    }
    public String getTipo() {
        return this.tipo;
    }
    public String getPass() {
        return this.pass;
    }
}

And I try to call from this other class

import javax.swing.*;
import java.util.ArrayList;
class principal {
    public static void main(String[] args) {
        String login;
        usuario[] bd_usuario=new usuario[3];
        JPasswordField jpf = new JPasswordField();
        JLabel titulo = new JLabel ("Ingrese su password");
        bd_usuario[0]=new usuario("Javier","admin","12345");
        bd_usuario[1]=new usuario("fernando","usuario","");
        bd_usuario[2]=new usuario("juan","usuario","");
        String usr;
        int option;
        usr=JOptionPane.showInputDialog(null,"ELIGA UNA OPCION\n\t1.-Iniciar sesion ADMINISTRADOR\n\t2.-Iniciar sesion USUARIO",JOptionPane.INFORMATION_MESSAGE);
        option=Integer.parseInt(usr);
        if (option==1) {
             int cs;
             String name;
             //String contra
             name=JOptionPane.showInputDialog(null,"Ingresa tu USUARIO");

             JOptionPane.showConfirmDialog (null, new Object[]{titulo, jpf}, "Inicio de sesion", JOptionPane.OK_CANCEL_OPTION);
             char p[] = jpf.getPassword();
             String contra= new String(p);
             for(cs=0;cs<3;cs++) {
                 if(name==bd_usuario[cs].getNombre() /*&& contra==bd_usuario[cs].getPass()*/) {
                     m=v1.menu1();
                     while(m>=1 && m<=7)    {
//demas funciones