用默认的double类型做除法比较好一点。 增加 if(li>=1e6) continue;判断
import java.util.Scanner;
public class Main {
public static void main(String[] args){
Scanner in = new Scanner(System.in);
int minusCount=0;
int postCount=0;
double sumPostive=0;
while(in.hasNextInt()){
int li = in.nextInt();
if(li>=1e6) continue;
if(li<0){
++ minusCount;
}else {
++ postCount;
sumPostive +=li;
}
}
System.out.println(minusCount);
System.out.printf("%.1f\n", sumPostive/postCount);
}
} 
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