可优化的代码段

      
        boolean
      
       haveApps = apps.contains(query);
      

      
        if
      
      (haveApps)
      

          app.add("apps");
      

      
        boolean
      
       haveBooks = books.contains(query);
      

      
        if
      
      (haveBooks)
      

          app.add("books");
      

      
        boolean
      
       haveMusic = music.contains(query);
      

      
        if
      
      (haveMusic)
      

          app.add("music");