Answer:
import java.util.Scanner;
class Main{
 public static void main(String[] args){
 double temp;
 Scanner scan = new Scanner (System.in);
 System.out.println("Enter the temperature, please: ");
 temp= scan.nextDouble();
 
 if (temp>=98.6){
 System.out.println("Fever.");
 }else{
 System.out.println("No Fever.");
 } 
 }