java pdf 出血检测

public static boolean isBleed(Map<String,Float> map){
        Float left = map.get("left");
        Float right = map.get("right");
        Float top = map.get("top");
        Float bottom = map.get("bottom");
        return isAB(left,right)&&isAB(left,bottom)&&isAB(left,top);


    }
    public static boolean isAB(float a,float b){
        return Math.abs(a-b)<0.01f;
    }
    public static Map<String,Float> getBleed(Rectangle media,Rectangle trim){
        Map<String,Float> map = new HashMap<>();
        float left = media.getLeft()/Shape.pt;
        float right = media.getRight()/Shape.pt;
        float top = media.getTop()/Shape.pt;
        float bottom = media.getBottom()/Shape.pt;
        float width = media.getWidth()/Shape.pt;
        float height = media.getHeight()/Shape.pt;

        if(trim==null){
            map.put("left",left);
            map.put("right",right-width);
            map.put("top",top-height);
            map.put("bottom",bottom);


        }else{
            float leftTrim = trim.getLeft()/Shape.pt;
            float rightTrim = trim.getRight()/Shape.pt;
            float topTrim = trim.getTop()/Shape.pt;
            float bottomTrim = trim.getBottom()/Shape.pt;

            map.put("left",leftTrim);
            map.put("right",width-rightTrim);
            map.put("top",height-topTrim);
            map.put("bottom",bottomTrim);
        }

        return map;
    }