Ëã·¨Ì⣺ȡ½üËÆÖµ

1.

 public static void main(String[] args) {
  Scanner sc = new Scanner(System.in);
     while(sc.hasNextDouble()){
            double l=sc.nextDouble();
            System.out.println(Math.round(l));
        }
 }

Math.round()ËÄÉáÎåÈë

2.

 private static void mthod2(){
   Scanner scan = new Scanner(System.in);
         while(scan.hasNext()){
             double d = scan.nextDouble();
             int dint = (int)d;
             if((d-dint)>=0.5 && (d-dint)<1)
                 dint++;
             System.out.println(dint);
         }
 }