i need help wrtingg this code in java

public class MainActivity extends AppCompatActivity $\{$

@override

protected void onCreate $($Bundle savedInstanceState$)\{$

super. on Create $($savedInstanceState$)$;

setContentView$(R.$ layout.activity$\_$main$)$;

findViewById$($R$.$ id$.$button$).$ setOnClickListener$($new

android.view.View.OnClickListener$()\{$

@override public void onClick$($android$.$view.View view$)\{$

$\}\})$;

$\}$

$\}$