How do I rewrite if into switch with cases as strings in android app?

I m detecting which button i clicked:

public void next_page(View view){

    //if else - works:

    if( view.getId() == "fly_button")        
            Log.d(LOG, " fly button clicked");
    else if (view.getId() == "imageButton") 
            Log.d(LOG, "image button clicked");

    //switch does not work:
   // every id is a string, how to show it as integer in "case"?

    switch(  view.getId()  ){
        case "fly_button":
            Log.d(LOG, "fly button clicked");
        case "imageButton":
            Log.d(LOG, "image button clicked");
    }