Ошибка: Caused by Android java.lang.ClassCastException: android.app.Application cannot be cast

 Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to com.example.artem.diplom.MISSQL
at com.example.artem.diplom.MainActivity.onCreate(MainActivity.java:43)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)

public class MainActivity extends AppCompatActivity {
 
    ListView listViewEMP;
    Button button_save, btn_search, btn_refresh;
    MISSQL missql;
    CustomAdapter adapter;
    ResultSet rs;
    ArrayList<HashMap<String, String>> MyArrList = new ArrayList<HashMap<String, String>>();
    HashMap<String, String> map;
    TextView txedit_search;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        if (Build.VERSION.SDK_INT> 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }
        missql=(MISSQL)getApplication();
        missql.open();

public class MISSQL extends Application {
    Connection conn = null;
    String url = "";
    String DBName = "";
    String UserName = "";
    String Password = "";
    String Servername = "";
    Statement st;
    ResultSet rs;
 
    public void open() {
        try {
            Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
            Class.forName("com.micrisift.sqlserver.jdbc.SQLServerDriver").newInstance();
            url="jdbc:jtds:sqlserver://"+Servername+";DatabaseName="
                    +DBName+";integratedSecurity=true;user="+UserName+";password="+Password;
            conn = DriverManager.getConnection(url);
        }catch (Exception e) {
            Toast.makeText(getApplicationContext(), "Error:" + e.getMessage(), Toast.LENGTH_LONG).show();
        }
    }