android studio alert dialog box

import android.os.Bundle;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;

// Create the object of AlertDialog Builder class
AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setMessage("AlertDialog Message");
builder.setTitle("AlertDialog Title");
builder.setCancelable(false);

builder.setPositiveButton("Yes",, new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        Toast.makeText(AccountActivity.this, R.string.log_out_success,
                Toast.LENGTH_LONG).show();
				
		// When the user click yes button
        // then app will close
        finish();
       
    }
});

builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        dialog.cancel(); // if user click no button ,then cancel the dialog box
    }
});

// Create the Alert dialog
AlertDialog alert = builder.create();

alert.show(); // show the Alert Dialog