java - HashSet is empty -

why hashset<circle> empty?

    latlng currentlocation = new latlng(mcurrentlocation.getlatitude(),mcurrentlocation.getlongitude());     googlemap googlemap = msupportmapfragment.getmap();      hashset<circle> circles = new hashset<>();      if (!circles.isempty()) {         (circle circle : circles) {             toast.maketext(getactivity(), "" + circles.size(), toast.length_short).show();             if (!circle.getcenter().equals(currentlocation)) {                 circle.remove();                 circles.remove(circle);             }         }     }      log.d(tag_map, "" + circles.isempty() + " " + circles.size());      circle circle = googlemap.addcircle(new circleoptions()             .radius(constant.radius)             .strokecolor(color.parsecolor(constant.radius_color))             .strokewidth(constant.radius_border)             .center(currentlocation));      circles.add(circle); 

i mean added circle object it. don't know what's wrong. plus circle gets drawn on map

you're creating new - , empty - set each time code runs:

hashset<circle> circles = new hashset<>(); if (!circles.isempty()) {     // you'll never in here... } 

if want maintain same set across calls, you'll need field, not local variable.