title: How to handle non static methods?
body: <p>I'm working on some code to insert a employee into a database when I do this for me I've done Database.dao().addEmployee(emp); it says non static method 'dao' cannot be referenced from a static context. If I add it to static then the addEmployee() becomes an error as well. I am unsure what this means as I am a very beginner. My dao is an interface for the database if that helps make sense of what I am trying to do. Any help would be muchly appreciated. Here is my code:</p>
  <pre><code>package com.example.a2;
  
  import androidx.appcompat.app.AppCompatActivity;
  import androidx.room.Room;
  
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.Button;
  import android.widget.EditText;
  import android.widget.Toast;
  
  
  public class MainActivity extends AppCompatActivity {
  
  public static Database database;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      database = Room.databaseBuilder(getApplicationContext(), Database.class, &quot;employeedb&quot;).allowMainThreadQueries().build();
  
      final Button logInBt = findViewById(R.id.buttonLogIn);
      final EditText userEditText = findViewById(R.id.editTextTextPersonName);
      final EditText passwordEditText = findViewById(R.id.editTextTextPassword);
  
      logInBt.setOnClickListener(new View.OnClickListener() {
          public void  onClick(View view) {
              Intent i = new Intent(getApplicationContext(), Inventory.class);
              startActivity(i);
  
              // Obtaining data from the interface
              String userName = userEditText.getText().toString();
              String password = passwordEditText.getText().toString();
  
              // Create new employee object
              Employee emp = new Employee();
              emp.setUserName(userName);
              emp.setPassword(password);
              
              //Insert customer into database
              Database.dao().addEmployee(emp);
  
              //Display a message
              Toast.makeText(getBaseContext(), &quot;Added successfully!&quot;, Toast.LENGTH_SHORT).show();
  
              // Clear the text
              userEditText.setText(&quot;&quot;);
              passwordEditText.setText(&quot;&quot;);
          }
      });
  
  }
  </code></pre>
  <p>}</p>